{"title":"Temperature \u0026 Humidity Sensors","description":"\u003cp\u003eTemperature and humidity sensors are the heart of weather stations, greenhouse monitors and smart fans.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe sensors we cover:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe \u003cstrong\u003eDHT11\u003c\/strong\u003e is the cheapest, at about ±2°C, and fine for classroom demos.\u003c\/li\u003e\n\u003cli\u003eThe \u003cstrong\u003eDHT22\u003c\/strong\u003e is far better, at about ±0.5°C over -40 to 80°C and 0-100% RH, but it can only be read once every 2 seconds.\u003c\/li\u003e\n\u003cli\u003eThe \u003cstrong\u003eAHT10 and AHT21B\u003c\/strong\u003e use I2C, so they share two wires with displays and other sensors.\u003c\/li\u003e\n\u003cli\u003eThe \u003cstrong\u003eBMP280\u003c\/strong\u003e reads pressure and temperature but not humidity.\u003c\/li\u003e\n\u003cli\u003eThe \u003cstrong\u003eBME280\u003c\/strong\u003e adds humidity.\u003c\/li\u003e\n\u003cli\u003eThe \u003cstrong\u003eBME680\u003c\/strong\u003e adds a gas (VOC) reading for indoor air quality.\u003c\/li\u003e\n\u003cli\u003eThe \u003cstrong\u003eDS18B20\u003c\/strong\u003e comes as a waterproof probe for liquids, fridges and aquariums.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eHow to choose:\u003c\/strong\u003e start with accuracy and interface. For most projects the DHT22 is the best value for accuracy. Pick an I2C sensor if your pins are limited, and a BME280 or BME680 if you want pressure or air quality too.\u003c\/p\u003e\n\u003cp\u003eAll of these work with Arduino and ESP32. On an ESP32, power them from 3.3V so the data line never sees 5V.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eDHT11 or DHT22?\u003c\/h3\u003e\n\u003cp\u003eThe DHT22. It cuts temperature error from about ±2°C to ±0.5°C and covers a wider range.\u003c\/p\u003e\n\u003ch3\u003eWhy does my DHT sensor return NaN?\u003c\/h3\u003e\n\u003cp\u003eUsually it is being read faster than once every 2 seconds, or the data line or pull-up is miswired.\u003c\/p\u003e\n\u003ch3\u003eDoes the BMP280 measure humidity?\u003c\/h3\u003e\n\u003cp\u003eNo. It measures pressure and temperature. For humidity choose the BME280; the BME680 adds VOC gas.\u003c\/p\u003e\n\u003ch3\u003eCan these sensors share pins?\u003c\/h3\u003e\n\u003cp\u003eThe I2C ones can (AHT, BMP\/BME). Each answers on its own address on the same SDA\/SCL pair.\u003c\/p\u003e\n\u003ch2\u003eGuides\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/guides\/dht11-vs-dht22-vs-aht10-accuracy-per-rupee\"\u003eDHT11 vs DHT22 vs AHT10: Accuracy per Rupee (2026)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/guides\/bmp280-vs-bme280-vs-bme680-environmental-sensors\"\u003eBMP280 vs BME280 vs BME680: Environmental Sensors Compared\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/guides\/dht22-esp32-pinout-wiring-code\"\u003eDHT22 + ESP32: Pinout, Wiring Diagram and Working Code\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"DHT11 or DHT22?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The DHT22. It cuts temperature error from about ±2°C to ±0.5°C and covers a wider range.\"}}, {\"@type\": \"Question\", \"name\": \"Why does my DHT sensor return NaN?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Usually it is being read faster than once every 2 seconds, or the data line or pull-up is miswired.\"}}, {\"@type\": \"Question\", \"name\": \"Does the BMP280 measure humidity?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No. It measures pressure and temperature. For humidity choose the BME280; the BME680 adds VOC gas.\"}}, {\"@type\": \"Question\", \"name\": \"Can these sensors share pins?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The I2C ones can (AHT, BMP\/BME). Each answers on its own address on the same SDA\/SCL pair.\"}}]}\u003c\/script\u003e\n\u003ch2\u003eReference pages on soldr.ai\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/soldr.ai\/docs\/components\/dht22\"\u003eDHT22 temperature and humidity sensor\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/soldr.ai\/docs\/components\/bme280\"\u003eBME280 (GY-BME280)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/soldr.ai\/docs\/components\/aht10\"\u003eAHT10 temperature and humidity sensor\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/soldr.ai\/docs\/components\/bmp280\"\u003eBMP280 pressure sensor\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/soldr.ai\/docs\/components\/sht30\"\u003eSHT30 temperature and humidity sensor\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/soldr.ai\/docs\/components\/htu21d\"\u003eHTU21D temperature and humidity sensor\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/soldr.ai\/docs\/components\/lm75-cjmcu-75\"\u003eLM75 temperature sensor (CJMCU-75)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/soldr.ai\/docs\/components\/lm35\"\u003eLM35 temperature sensor\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/soldr.ai\/docs\/components\/dht11\"\u003eDHT11 temperature and humidity sensor\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/soldr.ai\/docs\/components\/ds18b20\"\u003eDS18B20 temperature sensor\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eMore guides on soldr.ai\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/soldr.ai\/blog\/dht11-dht22-reads-nan\"\u003eDHT11 and DHT22 reading NaN\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/soldr.ai\/blog\/bme280-vs-bmp280-no-humidity\"\u003eBME280 vs BMP280\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eDescribe your build on \u003ca href=\"https:\/\/app.soldr.ai\"\u003eSoldr\u003c\/a\u003e and it picks the parts, writes and compiles the code, and shows how to wire them. Sign in and get 100 credits free.\u003c\/p\u003e","products":[{"product_id":"9-in-1-multi-function-sensor-board-dht11-lm35-temperature-sensor","title":"9-in-1 Multi-Function Sensor Board DHT11 LM35 Temperature Sensor","description":"\u003ch1\u003e9-in-1 Multi-Function Expansion Board with DHT11 and LM35 Temperature Sensor\u003c\/h1\u003e\n\n\u003cp\u003eThis all-in-one sensor board combines a DHT11 digital temperature and humidity sensor with a precision LM35 analog temperature sensor, along with seven additional input\/output components. Designed for rapid prototyping, it provides immediate environmental data for microcontroller projects without individual sensor wiring. The board simplifies development of weather monitors, climate controllers, and data loggers.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSensor Types\u003c\/td\u003e\n\u003ctd\u003eDHT11 (digital temp\/humidity), LM35 (analog temp), photoresistor, IR receiver, buzzer, button, LED, rotary potentiometer, RGB LED\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V–5.5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature Range (DHT11)\u003c\/td\u003e\n\u003ctd\u003e0°C to 50°C (±2°C accuracy)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHumidity Range (DHT11)\u003c\/td\u003e\n\u003ctd\u003e20% to 90% RH (±5% accuracy)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature Range (LM35)\u003c\/td\u003e\n\u003ctd\u003e-55°C to 150°C (10mV\/°C linear output)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBoard Dimensions\u003c\/td\u003e\n\u003ctd\u003e65mm x 30mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-animated-weather-station-display\"\u003eIndoor weather station with real-time display\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/smart-temperature-controlled-fan-with-arduino-kit\"\u003eTemperature-controlled fan or cooling system\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-greenhouse-climate-monitor-kit-with-arduino-uno-plus-sensors\"\u003eGreenhouse climate monitor with data logging\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eSmart home temperature alert via IoT\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eWorks directly with Arduino Uno, Mega, and Nano boards, as well as Raspberry Pi (with appropriate voltage level conversion if needed). The DHT11 uses a single digital pin, while the LM35 outputs analog voltage. All other onboard components operate at standard 3.3V\/5V logic, making them accessible via jumper wires or direct header stacking.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eSupply 5V to the VCC pin and connect GND to ground. For DHT11, connect the DATA pin to any digital I\/O (e.g., D2). For LM35, connect the OUT pin to an analog input (e.g., A0). A 4.7kΩ pull‑up resistor is often included on the board for the DHT11; verify before applying external power. Current draw is minimal, but avoid placing near heat sources for accurate readings.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno?\u003c\/summary\u003e\u003cp\u003eYes, it connects directly to Arduino Uno using female‑to‑female jumper wires or by stacking on a breadboard. All pins are labeled for easy hookup.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow accurate are the temperature readings?\u003c\/summary\u003e\u003cp\u003eThe DHT11 provides ±2°C accuracy, while the LM35 offers ±0.5°C when properly calibrated. For higher precision, use the LM35 output and compensate in software.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes this board require soldering?\u003c\/summary\u003e\u003cp\u003eNo soldering is needed; all components are pre‑soldered. Use standard DuPont jumper wires to connect to your microcontroller.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53444952392045,"sku":"CDN-0189","price":410.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/9-in-1-multi-function-sensor-board-dht11-lm35-temperature-sensor-5423012.jpg?v=1790780285"},{"product_id":"aht21b-temperature-humidity-sensor-module-i2c-high-accuracy","title":"AHT21B Temperature Humidity Sensor Module - I2C High Accuracy","description":"\u003ch1\u003eAHT21B Temperature and Humidity Sensor Module – I2C Interface, ±2% RH Accuracy\u003c\/h1\u003e\n\n\u003cp\u003eThe AHT21B is a digital temperature and humidity sensor module using the I2C protocol. It delivers accurate measurements with a typical accuracy of ±2% RH for humidity and ±0.3°C for temperature. Designed for low-power applications, this sensor is ideal for environmental monitoring, weather stations, and IoT data logging.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e2.2V – 5.5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHumidity Range\u003c\/td\u003e\n\u003ctd\u003e0% to 100% RH\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-40°C to +85°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHumidity Accuracy\u003c\/td\u003e\n\u003ctd\u003e±2% RH (typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature Accuracy\u003c\/td\u003e\n\u003ctd\u003e±0.3°C (typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eI2C (address 0x38)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-animated-weather-station-display\"\u003eIndoor weather station with real-time display\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-greenhouse-climate-monitor-kit-with-arduino-uno-plus-sensors\"\u003eGreenhouse or terrarium climate monitor\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eIncubator or mushroom farm humidity controller\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-server-room-temperature-monitor-kit-v4\"\u003eServer room temperature and humidity alert system\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis module works with any microcontroller supporting I2C, such as Arduino Uno, Nano, ESP32, ESP8266, and Raspberry Pi. The AHT21B runs from 2.2V to 5.5V, and its I2C pins follow its supply. Power it from the same voltage as your board's logic: 3.3V for ESP32, ESP8266 and Raspberry Pi, 5V for Arduino Uno.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC to 3.3V, GND to ground, SDA to the I2C data line (A4 on Arduino Uno), and SCL to the I2C clock line (A5 on Uno). The module includes built-in pull-up resistors, so external resistors are not required. Keep wires short and avoid noise sources for stable readings.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino?\u003c\/summary\u003e\u003cp\u003eYes, the AHT21B uses I2C and works with Arduino boards. Use the AHTxx library for easy interfacing. On a 5V Arduino, power the module from 5V so its I2C levels match.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the sampling rate?\u003c\/summary\u003e\u003cp\u003eThe sensor provides a new reading approximately every 2 seconds (0.5 Hz). It is not suitable for high-speed applications but perfect for periodic environmental logging.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan it be used outdoors?\u003c\/summary\u003e\u003cp\u003eThe bare module is not waterproof. For outdoor use, house it inside a weather-proof enclosure with a breathable membrane to allow humidity sensing while protecting from direct moisture and dust.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53444953866605,"sku":"CDN-0232","price":110.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/aht21b-temperature-humidity-sensor-module-i2c-high-accuracy-8361000.jpg?v=1790780226"},{"product_id":"aht25-temperature-humidity-sensor-i-c-digital-output","title":"AHT25 Temperature Humidity Sensor — I²C Digital Output","description":"\u003ch1\u003eAHT25 Integrated Temperature and Humidity Sensor — High Accuracy I²C Digital Output\u003c\/h1\u003e\u003cp\u003eThe AHT25 is a compact, calibrated digital temperature and humidity sensor with an I²C interface. It delivers accurate environmental data for IoT, weather stations, and automation projects. Its fully molded package and low power consumption make it reliable for battery-powered applications.\u003c\/p\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e2.2 V to 5.5 V (3.3 V typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Consumption\u003c\/td\u003e\n\u003ctd\u003e0.25 µA (sleep), 0.98 mA (measuring)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHumidity Range \/ Accuracy\u003c\/td\u003e\n\u003ctd\u003e0–100% RH; ±2% RH (typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range \/ Accuracy\u003c\/td\u003e\n\u003ctd\u003e-40°C to +80°C; ±0.3°C (typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eI²C, up to 1 MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage Dimensions\u003c\/td\u003e\n\u003ctd\u003e3.0 mm × 3.0 mm × 1.0 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-indoor-weather-station\"\u003eA local weather station that logs data to an SD card or cloud dashboard.\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-pi-4-automated-greenhouse-controller\"\u003eAn automated greenhouse controller that activates fans or misters based on humidity.\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003eA room climate monitor with an e‑paper display for egg incubators.\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-esp32-mqtt-home-sensor-network\"\u003eA smart home sensor node that reports conditions via MQTT over Wi‑Fi.\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eThe sensor operates on 3.3 V logic, making it a direct fit for Arduino boards (Uno, Nano) with a level shifter, and fully compatible with ESP32, ESP8266, Raspberry Pi Pico, and standard Raspberry Pi single‑board computers. The I²C address is 0x38 (backward‑compatible).\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eConnect SDA and SCL to the corresponding I²C pins on your microcontroller. Add 4.7 kΩ pull‑up resistors to both lines if the board lacks internal pull‑ups. Supply 2.2 V to 5.5 V (3.3 V typical), and keep the MCU supply equal to the sensor supply.\u003c\/p\u003e\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino?\u003c\/summary\u003e\u003cp\u003eYes. It works with any Arduino board running at 3.3 V, such as the Arduino Uno or Nano with an external level shifter. Use the Adafruit AHTx0 library for easy integration.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan I use it outdoors without a protective case?\u003c\/summary\u003e\u003cp\u003eThe sensor is not waterproof. For outdoor use, install it inside a weather shield that allows air flow but blocks direct rain and dust.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat accuracy can I expect compared to a DHT22?\u003c\/summary\u003e\u003cp\u003eThe AHT25 offers tighter accuracy (±0.3°C, ±2% RH) than a typical DHT22 (±0.5°C, ±2-5% RH). It also has a faster response time and lower power draw.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53444953964909,"sku":"CDN-0236","price":130.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/aht25-temperature-humidity-sensor-i2c-digital-output-8424401.jpg?v=1790780227"},{"product_id":"ds18b20-digital-temp-sensor-module-1-wire-55-to-125c","title":"DS18B20 Digital Temp Sensor Module 1-Wire -55 to +125°C","description":"\u003ch1\u003eDS18B20 Digital Temperature Sensor Module – 1-Wire, -55°C to +125°C, ±0.5°C Accuracy\u003c\/h1\u003e\n\n\u003cp\u003eThe DS18B20 is a digital thermometer that communicates over a 1-Wire bus, allowing multiple sensors to be connected using only one GPIO pin. It measures temperatures from -55°C to +125°C with ±0.5°C accuracy across a wide range, making it perfect for environmental monitoring, home automation, and industrial control. The module includes the sensor, a 4.7kΩ pull-up resistor, and a convenient 3-pin terminal for easy connection.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3.0V to 5.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-55°C to +125°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e±0.5°C (-10°C to +85°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e9-bit to 12-bit (configurable)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003e1-Wire (Dallas protocol)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePull-up Resistor\u003c\/td\u003e\n\u003ctd\u003eOnboard 4.7kΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-indoor-weather-station\"\u003eWeather station with multiple DS18B20 sensors\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eSmart thermostat for home heating\/cooling systems\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/arduino-aquarium-temperature-controller-kit-pid-precision\"\u003eAquarium or terrarium temperature controller\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-server-room-temperature-monitor-kit-v4\"\u003eServer room ambient temperature monitor\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eWorks with any microcontroller supporting digital I\/O, including Arduino Uno\/Mega, ESP8266\/ESP32, Raspberry Pi, and STM32. The 1-Wire protocol is widely supported by libraries, and the 3.0–5.5V operating range ensures direct connectivity to 3.3V and 5V logic levels.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC to 3.3V or 5V, GND to ground, and DATA to a digital pin. A 4.7kΩ pull-up resistor between VCC and DATA is required; this module includes it onboard. For longer cable runs, use twisted pair and consider adding a capacitor for noise filtering.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno?\u003c\/summary\u003e\u003cp\u003eYes, the DS18B20 works directly with Arduino Uno using the OneWire and DallasTemperature libraries. Connect DATA to any digital pin (e.g., D2), and power from 5V.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I connect multiple sensors on one wire?\u003c\/summary\u003e\u003cp\u003eYes, each DS18B20 has a unique 64-bit serial code, allowing multiple sensors to share the same 1-Wire bus. Simply connect all DATA lines together with a single pull-up resistor.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes it work over long distances?\u003c\/summary\u003e\u003cp\u003eIn standard mode, cable lengths up to 50 meters are possible. For longer runs, use a dedicated 1-Wire driver or lower the bus speed.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53444954259821,"sku":"CDN-0243","price":70.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/ds18b20-digital-temp-sensor-module-1-wire-55-to-125c-3010180.jpg?v=1790780226"},{"product_id":"ntc-thermistor-temperature-sensor-module-3-pin-10kω","title":"NTC Thermistor Temperature Sensor Module - 3 Pin, 10kΩ","description":"\u003ch1\u003eNTC Thermistor Temperature Sensor Module - 3 Pin, 10kΩ at 25°C\u003c\/h1\u003e\n\n\u003cp\u003eThis NTC thermistor temperature sensor module provides an analog voltage output proportional to ambient temperature. It uses a 10kΩ NTC thermistor in a voltage divider circuit, offering reliable measurement from -55°C to 125°C. Ideal for environmental monitoring, thermal protection, and DIY automation projects.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-55°C to 125°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eResistance at 25°C\u003c\/td\u003e\n\u003ctd\u003e10kΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput\u003c\/td\u003e\n\u003ctd\u003eAnalog voltage (VOUT)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e±0.5°C (typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePin Count\u003c\/td\u003e\n\u003ctd\u003e3 (VCC, GND, AOUT)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-digital-thermometer-on-lcd\"\u003eDIY digital thermometer with LCD or OLED display\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-fan-temperature-controller\"\u003eAutomatic fan or cooler trigger based on temperature threshold\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-server-room-temperature-monitor-kit-v4\"\u003eIoT room temperature monitor using ESP8266 and cloud dashboard\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eOverheat protection circuit for 3D printers, motors, or battery packs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis module works with any microcontroller that has an analog-to-digital converter (ADC). Popular choices include Arduino Uno, Nano, ESP8266, ESP32, and Raspberry Pi (with an external ADC like MCP3008). The operating voltage is 5V, making it directly compatible with 5V systems. For 3.3V ADCs, use a voltage divider or level shifter on the analog output.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC to 5V, GND to ground, and AOUT to any analog pin (e.g., A0 on Arduino). No external pull-up resistor is needed; the module includes a built-in voltage divider. Keep sensor leads short to minimize noise interference.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino?\u003c\/summary\u003e\u003cp\u003eYes, it works directly with Arduino boards. Connect AOUT to an analog input pin and read the voltage using analogRead(). The module operates at 5V, which is ideal for Arduino's 5V ADC.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow accurate is the temperature reading?\u003c\/summary\u003e\u003cp\u003eTypical accuracy is ±0.5°C over the full range. For improved precision, calibrate with a known reference temperature and adjust the conversion formula in your code.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I extend the sensor wires?\u003c\/summary\u003e\u003cp\u003eYes, but avoid lengths beyond 30cm due to noise pickup. If extension is necessary, use shielded cable and add a 0.1µF ceramic capacitor near the module's AOUT pin to filter high-frequency noise.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53444955275629,"sku":"CDN-0266","price":40.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/ntc-thermistor-temperature-sensor-module-3-pin-10ko-4126190.jpg?v=1790780167"},{"product_id":"bme680-sensor-module-temp-humidity-pressure-gas-i2cspi","title":"BME680 Sensor Module - Temp Humidity Pressure Gas, I2C\/SPI","description":"\u003ch1\u003eBME680 Digital Temperature Humidity Pressure and Gas Sensor Module\u003c\/h1\u003e\n\n\u003cp\u003eThe BME680 is an integrated environmental sensor from Bosch that combines temperature, humidity, barometric pressure, and volatile organic compound (VOC) gas sensing in a single compact module. It communicates via I2C or SPI, making it suitable for indoor air quality monitoring, weather stations, and altitude tracking projects. With ultra-low power consumption, it's ideal for battery-operated or IoT devices.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSensor Chip\u003c\/td\u003e\n\u003ctd\u003eBosch BME680\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eI2C (up to 3.4 MHz) or SPI\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V (pin tolerance 1.8–3.6V)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-40°C to +85°C (±1°C accuracy)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHumidity Accuracy\u003c\/td\u003e\n\u003ctd\u003e±3% relative humidity\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePressure Accuracy\u003c\/td\u003e\n\u003ctd\u003e±1 hPa (300 to 1100 hPa range)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/pm2-5-air-quality-monitor-kit\"\u003eIndoor air quality monitor with VOC and temperature display\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-indoor-weather-station\"\u003ePersonal weather station with data logging to an SD card\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eAltitude logger for drones, rockets, or hiking GPS trackers\u003c\/li\u003e\n  \u003cli\u003eSmart home environmental sensor for automated ventilation control\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis module operates at 3.3V, so it works directly with 3.3V microcontrollers like ESP8266, ESP32, and Raspberry Pi. For 5V boards such as Arduino Uno, use a logic level shifter or ensure the I2C pull-up resistors are connected to the 3.3V rail. It pairs well with common I2C display modules (OLED\/LCD) for standalone readouts.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eFor I2C, connect VCC to 3.3V, GND to ground, SDA to data, and SCL to clock; the breakout often includes pull-up resistors. When using SPI, connect CS to a digital pin, SDI to MOSI, SDO to MISO, and SCK to clock, keeping wiring short to avoid signal integrity issues.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno?\u003c\/summary\u003e\u003cp\u003eYes, but since Arduino Uno runs at 5V, you must use a logic level shifter for the I2C lines and power the module with 3.3V to avoid damage.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow is altitude calculated from pressure?\u003c\/summary\u003e\u003cp\u003eThe sensor provides pressure readings, and altitude is derived using the barometric formula. For accurate results, calibrate with a reference sea-level pressure value from a weather station.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan this sensor measure CO2 levels directly?\u003c\/summary\u003e\u003cp\u003eNo, the BME680 measures broad VOCs but not CO2. Some libraries estimate equivalent CO2 (eCO2) based on gas resistance, but it is not a substitute for a dedicated CO2 sensor.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53444955439469,"sku":"CDN-0265","price":780.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/bme680-sensor-module-temp-humidity-pressure-gas-i2cspi-8621781.jpg?v=1790780167"},{"product_id":"pt100-head-type-temperature-sensor-10-inch-probe-compoden","title":"PT100 Head Type Temperature Sensor 10 inch Probe – Compoden","description":"\u003ch1\u003ePT100 Head Type Temperature Sensor – 10 inch Long Probe\u003c\/h1\u003e\n\n\u003cp\u003eThe PT100 head type temperature sensor features a platinum RTD element housed in a rugged connection head with a 10-inch (254 mm) stainless steel probe. It provides precise temperature measurement from -50°C to 400°C, making it suitable for industrial process control, scientific experiments, and DIY automation. The 3-wire configuration ensures accurate readings by compensating for lead resistance, and the standard terminal block simplifies wiring.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSensor Type\u003c\/td\u003e\n\u003ctd\u003ePT100 RTD\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eProbe Length\u003c\/td\u003e\n\u003ctd\u003e10 inches (254 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eProbe Diameter\u003c\/td\u003e\n\u003ctd\u003e6 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-50°C to 400°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e±0.3°C at 0°C (Class B)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eConnection\u003c\/td\u003e\n\u003ctd\u003e3-wire terminal block in head\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e316 stainless steel probe\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMounting Thread\u003c\/td\u003e\n\u003ctd\u003eM8x1.25\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/esp8266-d1-mini-data-logging-project-kit\"\u003eIndustrial temperature monitoring and data logging system\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eDIY PID controller for ovens, kilns, or soldering stations\u003c\/li\u003e\n  \u003cli\u003ePrecision 3D printer hotend temperature sensing\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/arduino-weather-logger-kit-for-hiking-trails-log-and-plot-data\"\u003eAmbient temperature logger for weather stations\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis sensor works with any RTD input module, such as the MAX31865 amplifier, which is widely available for Arduino, ESP32, and Raspberry Pi. It also connects directly to industrial PID controllers and PLCs. The recommended excitation current is 1 mA maximum to avoid self-heating, and supply voltage depends on the amplifier used (typically 3.3V or 5V). Pair with a MAX31865 for digital output via SPI, or with an analog front-end for direct ADC reading.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eInside the connection head, three terminals are provided: two carry the PT100 element signal, and the third is a compensation lead for 3-wire measurement. Connect all three to your RTD amplifier or instrument, matching the wiring diagram carefully. Keep lead wire runs as short as possible, and use shielded cable in electrically noisy environments. Always tighten terminal screws securely to prevent intermittent readings.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino?\u003c\/summary\u003e\u003cp\u003eYes, when used with a MAX31865 RTD amplifier module, this sensor connects easily to Arduino, ESP32, or Raspberry Pi through the SPI or I2C interface of the amplifier.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use this to measure liquid temperature?\u003c\/summary\u003e\u003cp\u003eThe probe is sealed and can be immersed in non-corrosive liquids. For aggressive chemicals or pressurized systems, install it inside a thermowell for protection.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the difference between a thermocouple and a PT100 RTD?\u003c\/summary\u003e\u003cp\u003ePT100 RTDs offer higher accuracy and long-term stability compared to most thermocouples. This sensor uses a platinum resistance element, whereas thermocouples generate a voltage, so wiring and interfacing differ.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53444957045101,"sku":"CDN-0291","price":630.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/pt100-head-type-temperature-sensor-10-inch-probe-compoden-4083681.jpg?v=1790780166"},{"product_id":"ds18b20-waterproof-temperature-sensor-probe-55c-to-125c","title":"DS18B20 Waterproof Temperature Sensor Probe -55°C to +125°C","description":"\u003ch1\u003eDS18B20 Waterproof Temperature Sensor Probe -55°C to +125°C\u003c\/h1\u003e\n\n\u003cp\u003eThe DS18B20 is a digital temperature sensor encased in a waterproof stainless steel probe. It communicates over a 1-Wire bus, requiring only one data line (plus ground) for communication, and provides 9-bit to 12-bit Celsius temperature measurements. With an operating range of -55°C to +125°C and ±0.5°C accuracy from -10°C to +85°C, it’s perfect for environmental monitoring, aquariums, soil temperature, and industrial applications.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-55°C to +125°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e±0.5°C (-10°C to +85°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e9-bit to 12-bit (programmable)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e3.0V to 5.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003e1-Wire (Maxim Integrated)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCable Length\u003c\/td\u003e\n\u003ctd\u003e1 meter (3.2 ft)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-aquarium-temperature-monitor-kit-v2\"\u003eAquarium or terrarium temperature monitor\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eSoil temperature probe for smart gardening\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-home-brewing-temperature-monitor-kit-with-arduino-mega-plus-servo\"\u003eHome brewing fermentation temperature controller\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-indoor-weather-station\"\u003eMulti-sensor weather station with Arduino or ESP32\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis sensor works with any microcontroller that supports the 1-Wire protocol, including Arduino (Uno, Nano, Mega), ESP8266, ESP32, Raspberry Pi, and STM32. It operates from 3.0V to 5.5V and can be used in parasitic power mode. Common pairings include Arduino with the OneWire library, or Raspberry Pi with DS18B20 kernel module support.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC (red) to 3.3V or 5V, GND (black) to ground, and DQ (yellow) to a digital pin. A 4.7kΩ pull-up resistor from DQ to VCC is required. For cables longer than 5 meters, use a stronger pull-up (2.2kΩ) and consider shielded cable to minimize noise.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino?\u003c\/summary\u003e\u003cp\u003eYes, the DS18B20 works with Arduino using the OneWire and DallasTemperature libraries. Connect DQ to any digital pin with a 4.7kΩ pull-up resistor.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I extend the probe cable?\u003c\/summary\u003e\u003cp\u003eYes, you can extend the cable up to 100m with proper pull-up and power supply. For long runs, use twisted pair or shielded cable to maintain signal integrity.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow many sensors can I connect to one pin?\u003c\/summary\u003e\u003cp\u003eThe 1-Wire bus supports multiple sensors on a single pin. Each DS18B20 has a unique 64-bit serial code, so you can connect dozens by reading their addresses.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53444959732077,"sku":"CDN-0357","price":75.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/ds18b20-waterproof-temperature-sensor-probe-55c-to-125c-7295819.jpg?v=1790780106"},{"product_id":"dht11-temperature-humidity-sensor-digital-output-0-50c","title":"DHT11 Temperature Humidity Sensor – Digital Output, 0-50°C","description":"\u003ch1\u003eDHT11 Temperature and Humidity Sensor – Reliable Digital Sensor for Environmental Monitoring\u003c\/h1\u003e\u003cp\u003eThe DHT11 is a basic, low-cost digital temperature and humidity sensor. It uses a capacitive humidity sensor and a thermistor to measure the surrounding air, providing a calibrated digital signal on a single data pin. Ideal for maker projects, weather stations, and home automation, the DHT11 delivers stable readings with update rates up to 1 Hz.\u003c\/p\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V to 5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e0°C to 50°C (±2°C accuracy)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHumidity Range\u003c\/td\u003e\n\u003ctd\u003e20% to 80% RH (±5% accuracy)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSampling Rate\u003c\/td\u003e\n\u003ctd\u003e1 Hz (once per second)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput\u003c\/td\u003e\n\u003ctd\u003eDigital signal (single-wire protocol)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e15.5mm x 12mm x 5.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-indoor-weather-station\"\u003eIndoor weather station displaying temperature and humidity on an LCD\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-fan-temperature-controller\"\u003eAutomated fan control based on room temperature\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/esp32-greenhouse-monitoring-kit-soil-and-climate-sensor-network\"\u003eGreenhouse monitoring system with alerts\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/10-sensor-environmental-data-logger-kit-for-arduino-mega\"\u003eData logger for environmental conditions using a microcontroller\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eThe DHT11 works with any microcontroller capable of digital I\/O. Commonly paired with Arduino Uno, Nano, ESP8266, ESP32, and Raspberry Pi (with 3.3V or 5V tolerance). The single-wire protocol is supported by standard libraries, making integration straightforward.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eConnect VCC to 3.3V–5V, GND to ground, and the DATA pin to a digital pin on your microcontroller. A pull-up resistor (4.7kΩ–10kΩ) between DATA and VCC is required for signal stability. Avoid long cable runs to prevent noise.\u003c\/p\u003e\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno?\u003c\/summary\u003e\u003cp\u003eYes, the DHT11 can be directly connected to any digital pin on an Arduino Uno. Use the DHT library for easy reading.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat is the maximum sampling rate?\u003c\/summary\u003e\u003cp\u003eThe DHT11 updates readings at most once per second (1 Hz). Faster polling may return stale data or cause errors.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan it be used outdoors?\u003c\/summary\u003e\u003cp\u003eThe DHT11 is not waterproof and is rated for 0–50°C, 20–80% RH. For outdoor use, place it in a sheltered enclosure to avoid direct exposure.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53444960452973,"sku":"CDN-0378","price":59.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/dht11-temperature-humidity-sensor-digital-output-0-50c-2590664.jpg?v=1790780106"},{"product_id":"lm35-precision-analog-temperature-sensor-to-92","title":"LM35 Precision Analog Temperature Sensor (TO-92)","description":"\u003ch1\u003eLM35 Precision Centigrade Temperature Sensor - Analog Output\u003c\/h1\u003e\u003cp\u003eThe LM35 is a precision integrated-circuit temperature sensor that outputs an analog voltage linearly proportional to the Celsius temperature. No external calibration or trimming is required, achieving typical accuracies of ±0.5°C at room temperature. It is widely used in Arduino, AVR, and PIC projects for reliable temperature monitoring.\u003c\/p\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e4V to 30V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Scale\u003c\/td\u003e\n\u003ctd\u003e10 mV\/°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-55°C to 150°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e±0.5°C (typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003eAnalog voltage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage\u003c\/td\u003e\n\u003ctd\u003eTO-92 (3-pin)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-digital-thermometer-on-lcd\"\u003eDigital thermometer with Arduino and a 16x2 LCD display\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-fan-temperature-controller\"\u003eAutomatic fan speed controller based on ambient temperature\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003eOverheat alarm for batteries, motors, or enclosed electronics\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-cold-chain-temperature-data-logger\"\u003eTemperature data logger for greenhouse or laboratory monitoring\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eThe LM35 operates from a single supply (4V–30V) and draws only 60 µA, making it compatible with any microcontroller having an analog input, such as Arduino Uno, Nano, ESP32, and Raspberry Pi Pico. It outputs a linear voltage, easily read by 10-bit or 12-bit ADCs. Often paired with 7-segment displays or serial plotters for real-time visualization.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eConnect the VCC pin to 5V (or 3.3V for reduced self-heating), GND to ground, and the output pin directly to an analog input channel. No pull-up resistors or external components are required. For accurate readings, keep the sensor away from PCB heat sources and provide slight air circulation if measuring ambient air.\u003c\/p\u003e\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino?\u003c\/summary\u003e\u003cp\u003eYes, the LM35 works directly with Arduino boards by connecting its output to an analog pin, then using analogRead(). Convert the ADC value to Celsius with: temperature = (analogValue * 5.0 \/ 1024.0) * 100.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes it need external calibration?\u003c\/summary\u003e\u003cp\u003eNo, the LM35 is factory-calibrated to produce 10 mV per degree Celsius with ±0.5°C accuracy. For most hobbyist and educational projects, no recalibration is necessary.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat is the difference between LM35 and LM34?\u003c\/summary\u003e\u003cp\u003eThe LM35 outputs temperature in Celsius, while the LM34 outputs in Fahrenheit. Both are analog sensors, but the LM35 is more common for metric-based projects and easier integration with Celsius-referenced software.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53444960813421,"sku":"CDN-0391","price":70.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/lm35-precision-analog-temperature-sensor-to-92-9153084.jpg?v=1790780106"},{"product_id":"cjmcu-75-lm75-i2c-digital-temperature-sensor-module","title":"CJMCU-75 LM75 I2C Digital Temperature Sensor Module","description":"\u003ch1\u003eCJMCU-75 LM75 I2C Temperature Sensor Module (±2°C Accuracy)\u003c\/h1\u003e\n\n\u003cp\u003eThe CJMCU-75 is a compact breakout board for the LM75 digital temperature sensor, communicating over I2C. It provides accurate temperature readings with ±2°C accuracy, ideal for environmental monitoring, HVAC systems, and automation projects. The module operates from 2.8V to 5.5V and includes pull-up resistors, making it easy to connect directly to 3.3V or 5V microcontrollers.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSensor Chip\u003c\/td\u003e\n\u003ctd\u003eLM75\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eI2C (up to 400 kHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-25°C to +100°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e±2°C (max)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e0.125°C (11-bit)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e2.8V – 5.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-arduino-digital-thermometer-kit\"\u003eBuild a digital room thermometer with an OLED display and Arduino Uno.\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-cold-chain-temperature-data-logger\"\u003eCreate a Wi-Fi enabled temperature logger using ESP32 that uploads data to the cloud.\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-fan-temperature-controller\"\u003eDesign a smart fan controller that adjusts speed based on ambient temperature.\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eDevelop an over-temperature alarm system with a buzzer and LED indicator for machinery.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis module works with any microcontroller supporting I2C, including Arduino (Uno, Nano, Mega), ESP32, ESP8266, Raspberry Pi, and STM32. The onboard pull-up resistors allow direct connection to 3.3V or 5V logic levels. The default I2C address is 0x48, but you can chain up to 8 modules by configuring the A0-A2 pins.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC to 3.3V\/5V, GND to GND, SDA to A4 (Arduino Uno) or GPIO21 (ESP32), SCL to A5 (Arduino Uno) or GPIO22 (ESP32). No external pull-up resistors are needed as they are included on the module.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Raspberry Pi?\u003c\/summary\u003e\u003cp\u003eYes, the CJMCU-75 works with Raspberry Pi via I2C. Enable the I2C interface in raspi-config, and you can read temperature using Python's smbus library.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use multiple sensors on the same I2C bus?\u003c\/summary\u003e\u003cp\u003eYes, by connecting the A0, A1, and A2 pins to different logic levels, you can set up to 8 unique addresses (0x48 to 0x4F). The module defaults to all grounded (0x48).\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the measurement update rate?\u003c\/summary\u003e\u003cp\u003eThe sensor updates temperature data roughly every 100 milliseconds, providing a balance between speed and power consumption.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53444999774573,"sku":"CDN-0618","price":95.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/cjmcu-75-lm75-i2c-digital-temperature-sensor-module-4641499.jpg?v=1790779986"},{"product_id":"htu21d-temperature-and-humidity-sensor-module-i2c-compoden","title":"HTU21D Temperature and Humidity Sensor Module I2C — Compoden","description":"\u003ch1\u003eHTU21D Temperature and Humidity Sensor Module I2C\u003c\/h1\u003e\n\n\u003cp\u003eThe HTU21D is a digital temperature and humidity sensor module with I2C interface, providing accurate environmental readings in a compact breakout board. It is commonly used in weather stations, smart home systems, and industrial monitoring for real-time climate data. With factory calibration and low power consumption, it ensures reliable performance in battery-powered projects.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSensor Chip\u003c\/td\u003e\n\u003ctd\u003eHTU21D\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCommunication Interface\u003c\/td\u003e\n\u003ctd\u003eI2C (address 0x40)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e1.5V – 3.6V (3.3V typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-40°C to +125°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHumidity Range\u003c\/td\u003e\n\u003ctd\u003e0% to 100% RH\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e±0.3°C (temp), ±2% RH\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-indoor-weather-station\"\u003ePersonal weather station with real-time data logging\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eSmart thermostat or humidity controller for home automation\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/esp32-greenhouse-monitoring-kit-soil-and-climate-sensor-network\"\u003eGreenhouse climate monitoring system\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/10-sensor-environmental-data-logger-kit-for-arduino-mega\"\u003ePortable environmental data logger for field research\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis module operates at 3.3V logic, making it directly compatible with 3.3V boards like ESP32, ESP8266, and Raspberry Pi. For 5V microcontrollers such as the Arduino Uno, use a logic level converter or ensure I2C pull-up resistors are connected to 3.3V to prevent damage. Common libraries like Adafruit HTU21D simplify integration.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC to 3.3V, GND to ground, SDA to A4 (Arduino) or GPIO 21 (ESP32), and SCL to A5 (Arduino) or GPIO 22 (ESP32). If your board lacks built-in pull-ups, add 4.7kΩ resistors between SDA and 3.3V, and SCL and 3.3V.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno?\u003c\/summary\u003e\u003cp\u003eThe HTU21D is a 3.3V sensor. For Arduino Uno (5V), use a logic level shifter or pull I2C lines up to 3.3V to avoid damage. A dedicated 3.3V–5V level converter module is recommended.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes this sensor require calibration?\u003c\/summary\u003e\u003cp\u003eNo manual calibration is needed. The HTU21D is factory-calibrated and delivers digital data directly, maintaining accuracy over its lifespan.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan it be used outdoors?\u003c\/summary\u003e\u003cp\u003eYes, it can be deployed outdoors if housed in a weatherproof enclosure to protect against rain, dust, and direct moisture. Avoid exposing the sensor element to liquid water.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445001281901,"sku":"CDN-0622","price":160.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/htu21d-temperature-and-humidity-sensor-module-i2c-compoden-3086912.jpg?v=1790779986"},{"product_id":"gy-sht30-d-temperature-humidity-sensor-module-i2c-high-accuracy","title":"GY-SHT30-D Temperature Humidity Sensor Module - I2C, High Accuracy","description":"\u003ch1\u003eGY-SHT30-D Digital Temperature and Humidity Sensor Module — I2C, ±0.3°C Accuracy\u003c\/h1\u003e\n\n\u003cp\u003eThe GY-SHT30-D is a precision digital sensor module for measuring temperature and relative humidity. It communicates via I2C, offering high accuracy of ±0.3°C for temperature and ±2%RH for humidity. Ideal for environmental monitoring, weather stations, and home automation projects.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e2.4V to 5.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-40°C to +125°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHumidity Range\u003c\/td\u003e\n\u003ctd\u003e0% to 100% RH\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTypical Accuracy\u003c\/td\u003e\n\u003ctd\u003e±0.3°C, ±2%RH\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eI2C Address\u003c\/td\u003e\n\u003ctd\u003e0x44\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eModule Dimensions\u003c\/td\u003e\n\u003ctd\u003e15 × 12 × 5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-animated-weather-station-display\"\u003eIndoor weather station with LCD display\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eGreenhouse environmental monitor\u003c\/li\u003e\n  \u003cli\u003eHumidity-controlled exhaust fan for electronics enclosure\u003c\/li\u003e\n  \u003cli\u003eData logger for mushroom cultivation or wine cellar\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eWorks with Arduino, ESP32, Raspberry Pi, and any microcontroller with I2C. Logic-level compatible with both 3.3V and 5V systems. Libraries available for Arduino and CircuitPython.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC to 3.3V or 5V, GND to GND, SDA and SCL to corresponding I2C pins. Most breakout boards include pull-up resistors; if not, add 4.7kΩ resistors to VCC. Keep sensor away from heat sources for stable readings.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno?\u003c\/summary\u003e\u003cp\u003eYes, connect SDA to A4 and SCL to A5. Use the Adafruit SHT31 or Sensirion SHT3x library for quick integration.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan it be used outdoors?\u003c\/summary\u003e\u003cp\u003eThe module is not waterproof. Use in sheltered enclosures; protect from rain and direct sunlight for accurate long-term readings.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the typical measurement frequency?\u003c\/summary\u003e\u003cp\u003eThe sensor can output data at up to 10 Hz in high-speed mode. Most example code reads at 1 Hz for a balance of speed and power.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445002723693,"sku":"CDN-0630","price":190.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/gy-sht30-d-temperature-humidity-sensor-module-i2c-high-accuracy-6746686.jpg?v=1790779927"},{"product_id":"ds18b20-original-temperature-sensor-accurate-digital-thermometer","title":"DS18B20 Original Temperature Sensor – Accurate Digital Thermometer","description":"\u003ch1\u003eDS18B20 Original Temperature Sensor – Digital Thermometer IC\u003c\/h1\u003e\n\n\u003cp\u003eThe DS18B20 is a digital temperature sensor from Maxim Integrated that communicates over a 1-Wire interface. It provides 9-bit to 12-bit Celsius temperature measurements and has a wide operating range from -55°C to +125°C with ±0.5°C accuracy from -10°C to +85°C. Its unique 64-bit serial code allows multiple sensors to be connected on the same data line, making it ideal for distributed sensing applications.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e3.0V to 5.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-55°C to +125°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAccuracy (-10°C to +85°C)\u003c\/td\u003e\n\u003ctd\u003e±0.5°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e9 to 12 bits (user configurable)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003e1-Wire (Maxim\/Dallas protocol)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePackage Type\u003c\/td\u003e\n\u003ctd\u003eTO-92 (original through-hole)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-indoor-weather-station\"\u003eDIY weather station with multiple outdoor sensors\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eHome thermostat using Arduino and a relay\u003c\/li\u003e\n  \u003cli\u003eIndustrial process monitoring with Raspberry Pi\u003c\/li\u003e\n  \u003cli\u003eTemperature logger with SD card storage\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThe DS18B20 works with any 3.3V or 5V microcontroller board, including Arduino Uno, Mega, Nano, ESP8266, ESP32, and Raspberry Pi. It requires only one digital pin for communication and can share the bus with other 1-Wire devices. The sensor is often used with the DallasTemperature or OneWire libraries in Arduino IDE.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect the VDD pin to 3.3V or 5V, GND to ground, and the DQ (data) pin to any digital I\/O on your microcontroller. A 4.7kΩ pull-up resistor between DQ and VDD is required for reliable operation. For long cable runs, consider using a shielded twisted-pair cable and a lower resistance value.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino?\u003c\/summary\u003e\u003cp\u003eYes, the DS18B20 is fully compatible with Arduino boards. Simply connect it to a digital pin, use a 4.7k pull-up resistor, and install the DallasTemperature library. Multiple sensors can share the same pin.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use this sensor without external power?\u003c\/summary\u003e\u003cp\u003eThe DS18B20 supports parasitic power mode where it draws power from the data line. However, for temperatures above 100°C or when using long wires, external power is recommended to ensure stable operation.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs this the waterproof version?\u003c\/summary\u003e\u003cp\u003eThis is the original TO-92 package sensor, not the pre-assembled waterproof probe. You can easily waterproof it yourself using heat shrink tubing and silicone sealant if needed for wet environments.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445023203693,"sku":"CDN-0751","price":40.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/ds18b20-original-temperature-sensor-accurate-digital-thermometer-6611483.jpg?v=1790779868"},{"product_id":"lm35d-analog-temperature-sensor-module-precision-centigrade-sensor","title":"LM35D Analog Temperature Sensor Module – Precision Centigrade Sensor","description":"\u003ch1\u003eLM35D Analog Temperature Sensor Module\u003c\/h1\u003e\n\u003cp\u003eThe LM35D is a precision integrated-circuit temperature sensor whose output voltage is linearly proportional to Celsius temperature. This module provides a simple breakout for the sensor, requiring only a single analog input pin to read temperature. With 10mV per degree Celsius scaling, it’s plug-and-play for microcontrollers and ideal for environmental monitoring, HVAC prototypes, and educational projects.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput Scale\u003c\/td\u003e\n\u003ctd\u003e10 mV per °C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e0°C to 100°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAccuracy (25°C)\u003c\/td\u003e\n\u003ctd\u003e±0.5°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e4V to 30V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003eAnalog voltage\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCurrent Drain\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;60 µA\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-server-room-temperature-monitor-kit-v4\"\u003eRoom temperature monitor with LCD display\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eArduino-based thermostat with relay control\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-indoor-weather-station\"\u003eMulti-sensor weather station for ambient logging\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-sd-card-data-logger\"\u003eBattery-powered temperature data logger with SD card\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThe LM35D module works with any board having an analog input. Use it with Arduino Uno, Nano, or Mega by connecting the output to A0. ESP8266 and ESP32 require an ADC pin (ESP32 ADC is 12-bit). Raspberry Pi needs an external ADC like MCP3008. The sensor outputs 0–1V for 0–100°C, so 5V tolerant ADCs read directly without level shifting.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC to 5V (or 3.3V if within supply range) and GND to ground. The OUT pin connects to an analog input. For stable readings, add a 100nF capacitor between VCC and GND near the sensor. Avoid long wires in noisy environments to prevent parasitic oscillations.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno?\u003c\/summary\u003e\u003cp\u003eYes, connect VCC to 5V, GND to GND, and OUT to pin A0. The analogRead value converts to Celsius by multiplying by (5.0\/1024)*100.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the accuracy of the LM35D?\u003c\/summary\u003e\u003cp\u003eTypical accuracy is ±0.5°C at 25°C. Over the full 0–100°C range, error can be up to ±2°C, but linearity remains excellent.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use this sensor outdoors or in humid conditions?\u003c\/summary\u003e\u003cp\u003eThe bare sensor is not waterproof. For outdoor use, place it inside a weatherproof enclosure or use a stainless steel probe version. Direct moisture may cause corrosion and reading drift.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445102076269,"sku":"CDN-0303","price":90.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/lm35d-analog-temperature-sensor-module-precision-centigrade-sensor-3766046.jpg?v=1790779566"},{"product_id":"dht22-temperature-humidity-sensor-module-accurate-readings","title":"DHT22 Temperature Humidity Sensor Module - Accurate Readings","description":"\u003ch1\u003eDHT22 Temperature and Humidity Sensor Module\u003c\/h1\u003e\n\u003cp\u003eThe DHT22 (also known as AM2302) is a digital temperature and humidity sensor that outputs calibrated readings over a single-wire interface. It offers higher accuracy and a wider measurement range than the DHT11, making it suitable for projects that need reliable environmental monitoring.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V – 5.5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-40°C to +80°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature Accuracy\u003c\/td\u003e\n\u003ctd\u003e±0.5°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHumidity Range\u003c\/td\u003e\n\u003ctd\u003e0 – 100% RH\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHumidity Accuracy\u003c\/td\u003e\n\u003ctd\u003e±2% RH (typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSampling Rate\u003c\/td\u003e\n\u003ctd\u003e0.5 Hz (every 2 seconds)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-animated-weather-station-display\"\u003eIndoor weather station with LCD display\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-greenhouse-climate-monitor-kit-with-arduino-uno-plus-sensors\"\u003eGreenhouse or terrarium climate monitor\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eHome automation thermostat and humidity logger\u003c\/li\u003e\n  \u003cli\u003eIncubator or server room environmental alarm\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThe DHT22 works with any microcontroller that supports digital I\/O, including Arduino Uno, Mega, Nano, ESP32, ESP8266, and Raspberry Pi. The module includes an onboard 4.7kΩ pull-up resistor, so you can connect it directly to a 3.3V or 5V logic board. Recommended libraries are the Adafruit DHT sensor library and the simple DHT22 library for Arduino.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC to 3.3V–5V, GND to ground, and DATA to a digital pin. The module already has a pull-up, so no external resistor is needed. Avoid cables longer than 1 metre, and never request readings faster than once every 2 seconds to get valid data.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino?\u003c\/summary\u003e\u003cp\u003eYes, the DHT22 works with all Arduino boards. Use the DHT sensor library by Adafruit on any digital pin.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the difference between DHT11 and DHT22?\u003c\/summary\u003e\u003cp\u003eThe DHT22 has a much wider temperature range (-40°C to 80°C vs 0–50°C) and better accuracy (±0.5°C vs ±2°C). Humidity readings are also more precise with the DHT22.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use it outdoors?\u003c\/summary\u003e\u003cp\u003eThe bare module is not weatherproof. For outdoor use, place it in a weatherproof enclosure with ventilation to protect from rain and direct moisture.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445107220845,"sku":"CDN-0364","price":122.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/dht22-temperature-humidity-sensor-module-accurate-readings-9611691.jpg?v=1790779508"},{"product_id":"bmp280-barometric-pressure-temperature-sensor-module-compodenin","title":"BMP280 Barometric Pressure \u0026 Temperature Sensor Module - Compoden.in","description":"\u003ch1\u003eBMP280 Pressure and Temperature Sensor Module (Barometer)\u003c\/h1\u003e\n\u003cp\u003eThe BMP280 is a digital barometric pressure and temperature sensor module based on Bosch's BMP280 chip. It measures atmospheric pressure from 300 hPa to 1100 hPa and temperature from -40°C to +85°C, providing accurate altitude estimation. Ideal for weather monitoring, drone altitude hold, and indoor navigation systems.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V – 5V DC (onboard regulator)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePressure Range\u003c\/td\u003e\n\u003ctd\u003e300 – 1100 hPa\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-40°C to +85°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eI2C (0x76\/0x77) and SPI\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e0.16 Pa (pressure), 0.01°C (temperature)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e±1 hPa (relative pressure), ±0.5°C\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-indoor-weather-station\"\u003eDIY Weather Station\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eDrone Altitude Hold System\u003c\/li\u003e\n  \u003cli\u003eIndoor Air Pressure Monitor\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/arduino-water-level-sensor-kit-measure-tank-level-on-lcd\"\u003eSmart Water Level Sensor\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThe BMP280 module works with Arduino, ESP32, Raspberry Pi, and any microcontroller supporting I2C or SPI. It operates at 3.3V logic but accepts 5V on Vin when using the onboard regulator, with I2C pull-up resistors typically included. Compatible libraries such as Adafruit BMP280 and SparkFun BMP280 simplify integration.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC to 3.3V (or 5V if the module supports), GND to GND, SCL to I2C clock, and SDA to I2C data. If using SPI, wire CSB, SCK, SDI, and SDO. The sensor draws under 1 mA, so a stable supply is sufficient. Avoid exceeding 3.6V on data pins without level shifting. The default I2C address is 0x76; check the solder jumper on the back of the module to change to 0x77.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino?\u003c\/summary\u003e\u003cp\u003eYes, it works with all Arduino boards that have I2C, such as Uno, Nano, and Mega. Use the Adafruit BMP280 library for quick setup.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the difference between BMP280 and BME280?\u003c\/summary\u003e\u003cp\u003eThe BMP280 measures pressure and temperature only. The BME280 adds humidity sensing. If you only need pressure and temperature, BMP280 is a cost-effective choice.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan this sensor be used outdoors?\u003c\/summary\u003e\u003cp\u003eYes, with a weatherproof enclosure. The operating range of -40°C to +85°C covers most outdoor conditions. Keep the sensor shielded from direct moisture and dust for reliable readings.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445107319149,"sku":"CDN-0366","price":40.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/bmp280-barometric-pressure-temperature-sensor-module-compodenin-7046715.jpg?v=1790779508"},{"product_id":"pt100-temperature-sensor-probe-platinum-rtd-for-precision-sensing","title":"PT100 Temperature Sensor Probe - Platinum RTD for Precision Sensing","description":"\u003ch1\u003ePT100 Temperature Sensor Probe\u003c\/h1\u003e\n\u003cp\u003eThe PT100 is a platinum resistance temperature detector (RTD) that offers high accuracy and stability over a wide temperature range. It is widely used in industrial, laboratory, and DIY automation projects where precise temperature monitoring is essential. The 3‑wire probe design simplifies integration with microcontroller‑based systems.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSensor Type\u003c\/td\u003e\n\u003ctd\u003ePlatinum RTD (PT100)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eResistance at 0°C\u003c\/td\u003e\n\u003ctd\u003e100 Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e‑50°C to +500°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003eClass B (±0.3°C at 0°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eProbe Material\u003c\/td\u003e\n\u003ctd\u003eStainless Steel 304\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCable Length\u003c\/td\u003e\n\u003ctd\u003e1.5 metres (shielded)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eHigh‑precision laboratory incubator temperature controller\u003c\/li\u003e\n  \u003cli\u003eIndustrial oven or furnace temperature monitoring system\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-indoor-weather-station\"\u003eRaspberry Pi weather station with outdoor temperature sensing\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e3D printer heated bed or hotend thermal regulation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThe PT100 sensor requires an RTD amplifier or a precise analog front‑end. It works with Arduino and ESP32 boards using the MAX31865 module. It can also be read directly by high‑resolution ADCs on microcontrollers like the Raspberry Pi Pico. For Raspberry Pi single‑board computers, use a dedicated RTD HAT or SPI module.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eUse a 3‑wire or 4‑wire connection to eliminate lead resistance errors. With the MAX31865 breakout, connect the two red wires to RTD+ and RTD−, and the white wire to the FORCE or RTD− reference. Ensure the reference resistor matches 430 Ω for optimal measurement. Avoid running sensor cables near high‑voltage lines.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino?\u003c\/summary\u003e\u003cp\u003eYes, it works with Arduino using a MAX31865 RTD amplifier board. The PT100 probe's 3‑wire output connects to the module, and libraries are available for straightforward temperature reading.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes it come with an amplifier?\u003c\/summary\u003e\u003cp\u003eNo, the sensor probe is supplied without an amplifier. You will need an external RTD‑to‑digital converter such as the MAX31865 to interface with microcontrollers.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the maximum cable length?\u003c\/summary\u003e\u003cp\u003eThe probe has a 1.5‑metre shielded cable, but you can extend it up to 10 metres using a 4‑wire configuration without significant accuracy loss.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445107745133,"sku":"CDN-0379","price":140.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/pt100-temperature-sensor-probe-platinum-rtd-for-precision-sensing-6186535.jpg?v=1790779508"},{"product_id":"aht10-temperature-humidity-sensor-module-compoden","title":"AHT10 Temperature \u0026 Humidity Sensor Module – Compoden","description":"\u003ch1\u003eAHT10 High Precision Digital Temperature And Humidity Sensor Module\u003c\/h1\u003e\n\u003cp\u003eThe AHT10 is a digital temperature and humidity sensor with factory‑calibrated output. It communicates over I2C and provides accurate readings for environmental monitoring and automation. Ideal for Arduino, ESP32, and Raspberry Pi projects.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSensor Chip\u003c\/td\u003e\n\u003ctd\u003eAHT10\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eI2C (up to 400 kHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e1.8V–3.6V (module: 3.3V\/5V via onboard LDO)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature Accuracy\u003c\/td\u003e\n\u003ctd\u003e±0.3°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHumidity Accuracy\u003c\/td\u003e\n\u003ctd\u003e±2% RH\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMeasurement Range\u003c\/td\u003e\n\u003ctd\u003e-40°C to +85°C, 0–100% RH\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/wifi-weather-station-with-esp8266-oled-display-kit\"\u003eIndoor weather station with OLED display\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eSmart greenhouse humidity controller\u003c\/li\u003e\n  \u003cli\u003eMushroom grow tent climate monitor\u003c\/li\u003e\n  \u003cli\u003eServer room environment data logger\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eCompatible with any 3.3V or 5V microcontroller that supports I2C, including Arduino Uno, Mega, ESP8266, ESP32, Raspberry Pi Pico, and STM32. The module’s onboard regulator lets you power it directly from a 5V rail while maintaining 3.3V logic levels.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC to 3.3V or 5V, GND to ground, and SDA\/SCL to your board’s I2C pins (A4\/A5 on Arduino Uno, GPIO21\/GPIO22 on ESP32). Add 4.7kΩ pull-up resistors on SDA and SCL if your board lacks them. Keep the sensor away from condensing humidity and direct heat sources.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino?\u003c\/summary\u003e\u003cp\u003eYes, it works with Arduino Uno, Nano, Mega, and others using the popular AHT10 library. Connect SDA to A4, SCL to A5, and include the library in your sketch.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes it need calibration before use?\u003c\/summary\u003e\u003cp\u003eNo, the AHT10 is factory-calibrated. It delivers compensated temperature and humidity readings directly over I2C without any user calibration.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I power the module directly from a 5V supply?\u003c\/summary\u003e\u003cp\u003eYes, the onboard regulator accepts 5V and supplies 3.3V to the sensor. Just connect VCC to 5V and GND to ground.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445124587885,"sku":"CDN-0659","price":120.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/aht10-temperature-humidity-sensor-module-compoden-4067811.jpg?v=1790779506"},{"product_id":"bme280-sensor-module-temp-humidity-pressure-i2cspi","title":"BME280 Sensor Module (GY-BME280, 5V) - Temp Humidity Pressure, I2C","description":"\u003ch1\u003eBME280 Temperature, Humidity and Pressure Sensor Module (GY-BME280, 5V)\u003c\/h1\u003e\n\n\u003cp\u003eThe BME280 is a Bosch environmental sensor that measures temperature, relative humidity and barometric pressure in one chip. This GY-BME280 module adds an onboard 3.3V regulator and level shifting, so it runs from a 5V Arduino Uno as well as a 3.3V ESP32. It has a 4-pin I2C header (address 0x76). Use it for weather stations, room climate monitors and altitude estimation.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSensor Chip\u003c\/td\u003e\n\u003ctd\u003eBosch BME280\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V – 5V DC (onboard 3.3V regulator)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLogic Level\u003c\/td\u003e\n\u003ctd\u003e3.3V and 5V (onboard level shifting)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eI2C only (address 0x76)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePins\u003c\/td\u003e\n\u003ctd\u003e4 pins: VIN, GND, SCL, SDA\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature\u003c\/td\u003e\n\u003ctd\u003e-40°C to +85°C, ±1°C (typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHumidity\u003c\/td\u003e\n\u003ctd\u003e0% to 100% RH, ±3% RH (typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePressure\u003c\/td\u003e\n\u003ctd\u003e300 – 1100 hPa, ±1 hPa (typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eWeather station with an OLED or LCD readout\u003c\/li\u003e\n  \u003cli\u003eRoom or greenhouse climate monitor\u003c\/li\u003e\n  \u003cli\u003eWi-Fi weather node that logs to a dashboard (ESP32 \/ ESP8266)\u003c\/li\u003e\n  \u003cli\u003eBarometric altitude and pressure-trend logger\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThe onboard regulator and level shifting let this module connect directly to 5V boards (Arduino Uno, Nano, Mega) and 3.3V boards (ESP32, ESP8266, Raspberry Pi Pico, Raspberry Pi). Libraries such as Adafruit BME280 and SparkFun BME280 support it. The BME280 is the BMP280 plus humidity; it is not the same chip, so use a BME280 library.\u003c\/p\u003e\n\n\u003ch2\u003eWiring and Code\u003c\/h2\u003e\n\u003cp\u003eWant the wiring and working code for your exact board and build? \u003ca href=\"https:\/\/soldr.ai\"\u003eSoldr\u003c\/a\u003e generates them for you.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eShips from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eDoes this work with a 5V Arduino Uno?\u003c\/summary\u003e\u003cp\u003eYes. This GY-BME280 module has an onboard 3.3V regulator and level shifting, so it can be powered from 5V and connected to a 5V board's I2C pins.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the difference between BME280 and BMP280?\u003c\/summary\u003e\u003cp\u003eThe BMP280 measures pressure and temperature only. The BME280 also measures relative humidity.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat I2C address does it use?\u003c\/summary\u003e\u003cp\u003eIt ships at address 0x76. The module has no SDO pin on its header, so the address is set on the board rather than from a pin.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":67709994369389,"sku":"CDN-4413","price":350.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/bme280-sensor-module-gy-bme280-5v-temp-humidity-pressure-i2c-9180206.jpg?v=1792248682"}],"url":"https:\/\/compoden.com\/collections\/temperature-humidity-sensors.oembed","provider":"Compoden","version":"1.0","type":"link"}