{"title":"Soil Moisture \u0026 Water Sensors","description":"\u003cp\u003eSoil moisture and water sensors power plant-watering systems, tank alarms and leak detectors.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSoil sensors come in two kinds:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eResistive probes\u003c\/strong\u003e pass current through two bare prongs. They are cheap but corrode in the soil within weeks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCapacitive sensors\u003c\/strong\u003e (such as the v2.0 boards) measure through a coated surface, so they last far longer. They are the better choice for anything left in a pot.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBoth give an analog voltage that you must calibrate. Note the reading in dry air and in water, and do not assume which end reads higher until you have measured it.\u003c\/p\u003e\n\u003cp\u003eFor water, a \u003cstrong\u003eresistive water-level board\u003c\/strong\u003e reports wet versus dry, which is fine for a leak alarm. The \u003cstrong\u003eXKC-Y25\u003c\/strong\u003e senses water through a plastic or glass tank wall up to 20 mm thick, so nothing goes inside the tank.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow to choose:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePick capacitive for soil.\u003c\/li\u003e\n\u003cli\u003ePick a sensor plate for leaks.\u003c\/li\u003e\n\u003cli\u003ePick the XKC-Y25 for tanks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eOn an ESP32, read analog sensors on ADC1 pins (such as GPIO34 or 35), because ADC2 stops working while Wi-Fi is on. The XKC-Y25 runs from 5-24V, so its output needs a diode or level shifter before an ESP32 pin.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eCapacitive or resistive soil sensor?\u003c\/h3\u003e\n\u003cp\u003eCapacitive. Resistive probes corrode within weeks, and capacitive ones last.\u003c\/p\u003e\n\u003ch3\u003eHow do I calibrate a soil sensor?\u003c\/h3\u003e\n\u003cp\u003eRecord the reading in air and in water, then map your readings between those two values.\u003c\/p\u003e\n\u003ch3\u003eWhich ESP32 pin should I use?\u003c\/h3\u003e\n\u003cp\u003eAn ADC1 pin such as GPIO34 or 35, which keeps working with Wi-Fi on.\u003c\/p\u003e\n\u003ch3\u003eDoes the XKC-Y25 work on a metal tank?\u003c\/h3\u003e\n\u003cp\u003eNo. It senses through plastic or glass walls up to 20 mm thick.\u003c\/p\u003e\n\u003ch2\u003eGuides\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/guides\/capacitive-vs-resistive-soil-moisture-sensor\"\u003eCapacitive vs Resistive Soil Moisture Sensor: Which to Buy\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/guides\/capacitive-soil-moisture-sensor-esp32-wiring-code\"\u003eCapacitive Soil Moisture Sensor + ESP32: Pinout, Wiring Diagram and Working Code\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/guides\/xkc-y25-v-esp32-wiring-code\"\u003eXKC-Y25-V + ESP32: Wire Colours, 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\": \"Capacitive or resistive soil sensor?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Capacitive. Resistive probes corrode within weeks, and capacitive ones last.\"}}, {\"@type\": \"Question\", \"name\": \"How do I calibrate a soil sensor?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Record the reading in air and in water, then map your readings between those two values.\"}}, {\"@type\": \"Question\", \"name\": \"Which ESP32 pin should I use?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"An ADC1 pin such as GPIO34 or 35, which keeps working with Wi-Fi on.\"}}, {\"@type\": \"Question\", \"name\": \"Does the XKC-Y25 work on a metal tank?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No. It senses through plastic or glass walls up to 20 mm thick.\"}}]}\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\/xkc-y25-v\"\u003eXKC-Y25-V liquid level sensor\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/soldr.ai\/docs\/components\/crowtail-capacitive-moisture\"\u003eCrowtail capacitive moisture sensor 2.0\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/soldr.ai\/docs\/components\/xkc-y26-v\"\u003eXKC-Y26-V liquid level sensor\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/soldr.ai\/docs\/components\/xkc-y26-pnp\"\u003eXKC-Y26 PNP 24 V level sensor\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/soldr.ai\/docs\/components\/xkc-y25-npn\"\u003eXKC-Y25 NPN liquid level sensor\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":"xkc-y25-npn-non-contact-liquid-level-sensor-for-water-tanks-pipes","title":"XKC-Y25 NPN Non-Contact Liquid Level Sensor for Water Tanks \u0026 Pipes","description":"\u003ch1\u003eXKC-Y25 NPN Intelligent Non-Contact Liquid Water Level Sensor (5-24V, Non-Metal Tank Detection)\u003c\/h1\u003e\n\n\u003cp\u003eThe XKC-Y25 is a capacitive non-contact liquid level sensor that detects water presence through plastic, glass, or ceramic walls without direct fluid contact. It outputs an NPN signal (low when liquid detected) suitable for microcontrollers and control circuits. Ideal for water tanks, pipelines, and automatic water level control 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\u003e5-24V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003eNPN (active low)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSensing Distance\u003c\/td\u003e\n\u003ctd\u003eUp to 13mm through non-metal wall\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eResponse Time\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;100ms\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;5mA\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-20°C to 80°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-water-level-indicator\"\u003eWater level indicator with LED or LCD display\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eAutomatic water pump controller for overhead tanks\u003c\/li\u003e\n  \u003cli\u003eTank overflow alarm with buzzer and relay\u003c\/li\u003e\n  \u003cli\u003ePipe burst detection by monitoring flow at multiple points\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eWorks with 3.3V and 5V logic microcontrollers like Arduino, ESP8266, ESP32, Raspberry Pi (with voltage divider). Output is open-collector NPN, requires pull-up resistor to VCC. Connect signal pin to digital input.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect red wire to VCC (5-24V DC), black wire to GND, yellow wire to digital input pin. Add a 10kΩ pull-up resistor from yellow wire to VCC if microcontroller internal pull-up is insufficient. Ensure sensor face is tightly attached to the non-metal container wall.\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 NPN output can be read directly by Arduino digital pins. Connect with a 10kΩ pull-up resistor and detect LOW when water is present.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan it detect water through metal pipes?\u003c\/summary\u003e\u003cp\u003eNo, it works only through non-metallic materials like plastic, glass, or ceramic. Metal interferes with capacitive sensing.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the maximum sensing distance?\u003c\/summary\u003e\u003cp\u003eUp to 13mm through a non-metal barrier, but this reduces with thicker or denser materials. Ensure the sensor face is flush against the container.\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":53444951998829,"sku":"CDN-0184","price":670.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/xkc-y25-npn-non-contact-liquid-level-sensor-for-water-tanks-pipes-6296154.jpg?v=1790780286"},{"product_id":"xkc-y26-pnp-24v-non-contact-liquid-level-sensor-compoden","title":"XKC-Y26 PNP 24V Non-Contact Liquid Level Sensor – Compoden","description":"\u003ch1\u003eXKC-Y26 PNP 24V Intelligent Non-Contact Liquid Level Sensor\u003c\/h1\u003e\u003cp\u003eThe XKC-Y26 is an intelligent non-contact capacitive liquid level sensor that detects fluid levels through non-metal container walls up to 6mm thick. Operating at 24V with PNP output, it switches when liquid is present, making it ideal for industrial tanks, aquariums, and water purification systems. No direct liquid contact eliminates corrosion and contamination risks.\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\u003eDetection Method\u003c\/td\u003e\n\u003ctd\u003eCapacitive, non-contact\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e12-24V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003ePNP Normally Open\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensing Thickness\u003c\/td\u003e\n\u003ctd\u003eUp to 6mm non-metal wall\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResponse Time\u003c\/td\u003e\n\u003ctd\u003e≤ 500ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCable Length\u003c\/td\u003e\n\u003ctd\u003eApprox. 1 meter\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-water-tank-level-monitor-kit-v2\"\u003eAutomatic water tank level controller with pump shut-off\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-industrial-gas-leak-detector-kit\"\u003eNon-contact liquid leak detector for industrial spill prevention\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/aquarium-water-quality-monitor-kit-with-arduino-tds-and-temp\"\u003eSmart aquarium monitor with low-water alert\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003eChemical drum level indicator without sensor corrosion\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eDesigned for 24V industrial systems with PNP input, this sensor integrates easily with PLCs, relay modules, and microcontrollers. For Arduino or Raspberry Pi, use a voltage divider or optocoupler to convert the 24V output to logic-level signals. Common pairings include automation controllers, Sump pump switches, and SCADA systems.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eConnect brown wire to +24V, blue to GND, and black to your control input. The PNP output sources current when liquid is detected; ensure your input circuit can sink at least 10mA safely. No pull-up resistor is needed as the output is active-high.\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, but a voltage divider or optocoupler is required to step down the 24V PNP output to the 5V logic safe for Arduino pins.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan it detect liquid through glass or plastic?\u003c\/summary\u003e\u003cp\u003eAbsolutely—it works through any non-metallic material up to 6mm thick, including glass, plastic, and ceramic containers.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes it include a sensitivity adjustment?\u003c\/summary\u003e\u003cp\u003eNo, the XKC-Y26 has fixed sensitivity calibrated for common water-based liquids; proper mounting is sufficient for reliable detection.\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":53444952195437,"sku":"CDN-0186","price":770.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/xkc-y26-pnp-24v-non-contact-liquid-level-sensor-compoden-1114091.jpg?v=1790780285"},{"product_id":"xkc-y25-v-non-contact-liquid-level-sensor-5v-digital-output","title":"XKC-Y25-V Non-Contact Liquid Level Sensor | 5V Digital Output","description":"\u003ch1\u003eXKC-Y25-V Intelligent Non-Contact Liquid Water Level Sensor with 5V Digital Output\u003c\/h1\u003e\n\n\u003cp\u003eThe XKC-Y25-V is a capacitive non-contact liquid level sensor that detects water and other liquids through non-metallic container walls, up to 20mm thick, without any direct fluid contact. It outputs a simple digital high\/low signal when liquid is present, making it perfect for automated tank monitoring, overflow prevention, and IoT water management 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\u003e5–24V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput Signal\u003c\/td\u003e\n\u003ctd\u003eDigital (High when liquid detected, Low otherwise)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSensing Distance\u003c\/td\u003e\n\u003ctd\u003eUp to 20mm through non-metallic walls\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eResponse Time\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;500ms\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-10°C to +70°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-water-tank-level-monitor-kit-v2\"\u003eAutomatic water tank level controller with pump shut-off\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-hydroponic-water-level-monitor\"\u003eNon-invasive aquarium water level monitor\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eIoT overflow alarm system for overhead tanks\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-automated-plant-watering\"\u003eAutomated plant watering system with soil moisture detection via container\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eIt needs a 5–24V supply. On a 5V supply it works directly with 5V boards such as Arduino Uno and Mega. On 3.3V boards (ESP32, NodeMCU, Raspberry Pi) never connect the output straight to a GPIO: use a Schottky diode with the pin's internal pull-up, or a logic level converter.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eThe sensor has a four-wire cable: brown to 5–24V, blue to ground, yellow is the output, and black (M) sets the mode (leave it unconnected for a HIGH output when liquid is present; tie it to ground to invert). On a 5V Arduino, yellow goes to a digital input. On 3.3V boards, connect yellow through a Schottky diode (band toward the sensor) to a GPIO set to INPUT_PULLUP, or use a logic level converter.\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. Powered from 5V, its output can be read directly by a 5V Arduino digital pin.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan it detect water through a plastic container?\u003c\/summary\u003e\u003cp\u003eYes, it works through common plastics, glass, and ceramic up to 20mm thick. Ensure the container is non-metallic and the sensor is flush against the outer wall.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes it work with metal tanks?\u003c\/summary\u003e\u003cp\u003eNo, this sensor requires a non-metallic barrier or direct contact with the liquid. Metal containers block the capacitive field.\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":53444952293741,"sku":"CDN-0188","price":630.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/xkc-y25-v-non-contact-liquid-level-sensor-5v-digital-output-2544542.jpg?v=1790780285"},{"product_id":"anti-corrosion-rated-water-level-sensor-with-ball-float-switch","title":"Anti-Corrosion Rated Water Level Sensor with Ball Float Switch","description":"\u003ch1\u003eAnti-Corrosion Rated Water Level Sensor with Ball Float Switch\u003c\/h1\u003e\n\n\u003cp\u003eThis water level sensor uses a ball float switch mechanism to detect liquid levels. Designed with corrosion-resistant contacts, it is ideal for water tanks, sumps, and industrial liquid containers. It provides reliable on\/off switching for automatic pump control or level alarms.\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\u003eContact Rating\u003c\/td\u003e\n\u003ctd\u003e10W \/ 50W max\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMax Switching Current\u003c\/td\u003e\n\u003ctd\u003e0.5A\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMax Switching Voltage\u003c\/td\u003e\n\u003ctd\u003e100V AC \/ DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e0°C to 60°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBody Material\u003c\/td\u003e\n\u003ctd\u003eCorrosion-resistant PP plastic\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCable Length\u003c\/td\u003e\n\u003ctd\u003e1 meter (customizable)\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-water-tank-level-monitor-kit-v2\"\u003eAutomatic overhead tank water level controller with pump cutoff\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eSump pump control to prevent dry run or overflow\u003c\/li\u003e\n  \u003cli\u003eLiquid level alarm system using a buzzer and microcontroller\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-automatic-plant-watering-system\"\u003eDIY automatic pet water dispenser or plant watering system\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis float switch works with any microcontroller including Arduino, ESP8266, ESP32, and Raspberry Pi. Use a digital input pin with internal pull-up to detect the switch state. It is compatible with both 5V and 3.3V logic boards when configured correctly.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect one wire to a digital I\/O pin with an internal pull-up resistor enabled, and the other to ground. When liquid level rises, the internal reed switch closes, pulling the pin low. Avoid switching high inductive loads directly; use a relay module for pump control.\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, connect the float switch to any digital pin with internal pull-up enabled. It acts as a simple switch, giving a HIGH\/LOW signal for water level detection.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow does the anti-corrosion feature work?\u003c\/summary\u003e\u003cp\u003eThe anti-corrosion rating comes from the sealed reed switch and corrosion-resistant PP plastic body, preventing rust and ensuring long life in water.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the maximum current this switch can handle?\u003c\/summary\u003e\u003cp\u003eThe switch can handle up to 0.5A of current. For higher loads, use a relay to control the pump or device.\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":53444953899373,"sku":"CDN-0231","price":140.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/anti-corrosion-rated-water-level-sensor-with-ball-float-switch-5416311.jpg?v=1790780226"},{"product_id":"xkc-y26-v-non-contact-liquid-level-sensor-5-24v-compoden","title":"XKC-Y26-V Non-Contact Liquid Level Sensor 5-24V | Compoden","description":"\u003ch1\u003eXKC-Y26-V Non-Contact Water Level Sensor – 5 to 24V DC Capacitive Switch\u003c\/h1\u003e\u003cp\u003eThe XKC-Y26-V is a non-contact capacitive liquid level sensor that detects water and other conductive liquids through the wall of a non-metallic container. Operating from 5V to 24V DC, it outputs a digital switch signal when liquid is present, making it ideal for automated fluid control, tank monitoring, and DIY projects.\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\u003e5–24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003eNPN (open collector)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDetection Distance\u003c\/td\u003e\n\u003ctd\u003eUp to 5 mm through non‑metallic walls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResponse Time\u003c\/td\u003e\n\u003ctd\u003e~100 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-20 to 80 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e30×20×8 mm (approx.)\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\u003eAutomatic water level controller for overhead tanks\u003c\/li\u003e\n\u003cli\u003eNon‑invasive liquid presence detector for coffee machines\u003c\/li\u003e\n\u003cli\u003eAquarium sump overflow alarm system\u003c\/li\u003e\n\u003cli\u003eIndustrial coolant level monitoring for CNC machines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eWorks with any 5–24V microcontroller or PLC. Directly interfaces with Arduino (5V), ESP32, Raspberry Pi (with level shifting), and industrial controllers. The open‑collector output requires a pull‑up resistor (10kΩ) to your logic voltage. Not suitable for metallic containers or sensing through thick walls (\u0026gt;5 mm).\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eConnect VCC (red) to 5–24V, GND (black) to ground, and OUT (yellow) to a digital input with a 10kΩ pull‑up to VCC. The sensor triggers when liquid is detected—OUT goes low. Ensure the sensing pad is firmly pressed against the clean, dry, non‑metallic surface.\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 Nano?\u003c\/summary\u003e\u003cp\u003eYes, it works directly with Arduino Nano at 5V. Connect OUT to a digital pin with a pull‑up resistor, and monitor the pin for a LOW signal when liquid is detected.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan it detect diesel or oil?\u003c\/summary\u003e\u003cp\u003eThis sensor is optimized for water and conductive liquids. Diesel and oils are non‑conductive; detection is unreliable. For such fluids, consider optical or float‑based sensors.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat if my container wall is thick?\u003c\/summary\u003e\u003cp\u003eThe maximum detection distance is about 5 mm for standard plastic or glass. For thicker walls, you may need a sensor with longer range or a different mounting method.\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":53444980638061,"sku":"CDN-0563","price":800.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/xkc-y26-v-non-contact-liquid-level-sensor-5-24v-compoden-5741043.jpg?v=1790779987"},{"product_id":"capacitive-soil-moisture-sensor-v20-corrosion-resistant-analog-probe","title":"Capacitive Soil Moisture Sensor V2.0 – Corrosion-Resistant Analog Probe","description":"\u003ch1\u003eCapacitive Soil Moisture Sensor V2.0 – Corrosion-Resistant Analog Output\u003c\/h1\u003e\u003cp\u003eThe Capacitive Soil Moisture Sensor V2.0 measures soil moisture by detecting changes in capacitance, not resistance, making it resistant to corrosion. It outputs an analog voltage that corresponds to the moisture level, suitable for microcontrollers with ADC inputs. This sensor is ideal for automated irrigation, plant monitoring, and smart agriculture projects.\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 – 5.5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Signal\u003c\/td\u003e\n\u003ctd\u003eAnalog (0V – 3.0V at 3.3V supply)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensor Type\u003c\/td\u003e\n\u003ctd\u003eCapacitive (non-corrosive)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003e3-pin header (VCC, GND, AOUT)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e98mm × 23mm × 6mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e15g\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-automatic-plant-watering-system\"\u003eAutomatic plant watering system with Arduino and pump\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003eSoil moisture monitoring dashboard with ESP32 and Blynk\u003c\/li\u003e\n\u003cli\u003eSmart garden with Raspberry Pi and relay control\u003c\/li\u003e\n\u003cli\u003eLow-power wireless sensor node for agriculture\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eThis sensor works with any microcontroller that supports analog input, such as Arduino Uno, Nano, Mega, ESP32, ESP8266, and STM32 boards. For Raspberry Pi, pair it with an external ADC like the MCP3008. It operates at both 3.3V and 5V logic levels, with no level shifting required.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eConnect VCC to 3.3V or 5V, GND to ground, and AOUT to an analog input pin. For Raspberry Pi, use an MCP3008 ADC and connect the sensor output to one of its analog channels. No pull-up resistor is needed; the analog signal directly corresponds to moisture.\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, connect AOUT to any analog pin (A0-A5 on Uno) and read the voltage using analogRead(). The output voltage changes with moisture; calibrate it with a dry and a wet reading.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan this sensor be left in soil permanently?\u003c\/summary\u003e\u003cp\u003eIts capacitive design resists corrosion, but avoid submersion in water. For long-term deployment, protect the electronics with conformal coating and ensure the PCB edge is not continuously wet.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eHow accurate is the moisture reading?\u003c\/summary\u003e\u003cp\u003eThe sensor provides a relative measurement; the analog value changes with moisture, and which end reads higher depends on the board, so measure it first. For absolute accuracy, calibrate by taking readings in completely dry and saturated soil, then map the range in your code.\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":53445016224109,"sku":"CDN-0699","price":55.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/capacitive-soil-moisture-sensor-v20-corrosion-resistant-analog-probe-3320522.jpg?v=1790779926"},{"product_id":"rain-drop-sensor-module-digital-analog-output-compoden","title":"Rain Drop Sensor Module – Digital \u0026 Analog Output | Compoden","description":"\u003ch1\u003eRain Drop Sensor Module with Analog and Digital Output\u003c\/h1\u003e\n\n\u003cp\u003eThe rain drop sensor module detects rain or water droplets by measuring changes in resistance on its nickel-coated sensing pad. It provides both a digital signal (triggered when moisture exceeds a set threshold) and an analog output proportional to the amount of water. Ideal for automatic weather stations, irrigation controllers, and water leak detectors, it connects easily to microcontrollers and single-board computers.\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 - 5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003eDigital (DO) + Analog (AO)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eComparator Chip\u003c\/td\u003e\n\u003ctd\u003eLM393\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSensing Pad Dimensions\u003c\/td\u003e\n\u003ctd\u003e54mm x 40mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eModule Dimensions\u003c\/td\u003e\n\u003ctd\u003e32mm x 14mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eConnector\u003c\/td\u003e\n\u003ctd\u003e4-pin (VCC, GND, DO, AO)\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\u003eAutomatic rain alarm that buzzes when precipitation starts\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-soil-moisture-auto-watering\"\u003eSmart irrigation system that pauses watering when soil moisture is high\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eDIY automatic car windshield wiper control\u003c\/li\u003e\n  \u003cli\u003eRoof leak detector with remote notification via Arduino and Wi‑Fi\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThe module works with all 3.3V and 5V microcontrollers that have digital GPIO and analog input pins, including Arduino Uno, Nano, Mega, ESP8266, ESP32, and Raspberry Pi (with external ADC). Its onboard comparator makes digital readout straightforward even on boards without analog inputs, while the analog pin gives detailed moisture levels for threshold‑based projects.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC to 5V or 3.3V and GND to common ground. Use the DO pin on a digital input for simple rain\/no‑rain detection, adjusting the blue potentiometer to set the trigger threshold. For moisture level measurement, connect the AO pin to an analog input. Avoid submerging the entire sensing pad underwater; it is intended for surface rain detection.\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 5V Arduino boards. Connect DO to a digital pin and AO to an analog pin for full rain detection and level monitoring.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I adjust the rain sensitivity?\u003c\/summary\u003e\u003cp\u003eThe module has a potentiometer; turn it clockwise to reduce sensitivity (requires more water to trigger) or counterclockwise to increase sensitivity.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan the sensing pad be left outside permanently?\u003c\/summary\u003e\u003cp\u003eWhile designed for outdoor use, prolonged exposure to UV and dust can degrade the nickel coating. Cover or remove when not in use to extend sensor life.\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":53445024874861,"sku":"CDN-0773","price":45.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/rain-drop-sensor-module-digital-analog-output-compoden-6272815.jpg?v=1790779868"},{"product_id":"soil-moisture-sensor-module-analogdigital-output-adjustable-threshold","title":"Soil Moisture Sensor Module — Analog\/Digital Output, Adjustable Threshold","description":"\u003ch1\u003eSoil Moisture Sensor Module — Analog\/Digital Output with Adjustable Threshold\u003c\/h1\u003e\n\n\u003cp\u003eThe Soil Moisture Sensor Module detects water content in soil by measuring resistance between two probes. It provides both analog and digital outputs, making it suitable for simple threshold-based alerts or precise moisture monitoring in automated irrigation systems. The onboard LM393 comparator and potentiometer let you set a trigger level for the digital output, while the analog output connects directly to a microcontroller ADC pin for real-time readings.\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 – 5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003eAnalog (0 – VCC) and Digital (0 \/ VCC)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eComparator\u003c\/td\u003e\n\u003ctd\u003eLM393 with threshold adjustment\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eProbe Material\u003c\/td\u003e\n\u003ctd\u003eNickel-plated copper with protective coating\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePCB Dimensions\u003c\/td\u003e\n\u003ctd\u003e36 mm x 15 mm x 7 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eProbe Length\u003c\/td\u003e\n\u003ctd\u003e65 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-smart-garden-watering-kit-with-arduino-mega-plus-sensor\"\u003eAutomatic garden watering system that activates a pump when soil is dry\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/esp32-indoor-plant-monitor-kit-predict-yield-with-ai\"\u003eIndoor plant monitor with LED or alert when moisture drops below a set point\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eIoT soil tracker that logs moisture data to the cloud using an ESP8266\u003c\/li\u003e\n  \u003cli\u003eAgriculture automation prototype for greenhouse irrigation management\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 input, such as Arduino Uno, Nano, ESP32, ESP8266, and Raspberry Pi Pico. For Raspberry Pi boards without analog pins, use an external ADC like the MCP3008. It runs on 3.3V or 5V logic, and the analog output scales with the supply voltage—calibrate accordingly in your code.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC to 3.3V or 5V, GND to ground. For analog monitoring, wire AOUT to an analog pin. For digital threshold, use DOUT and adjust the on‑board potentiometer until the indicator LED switches at your desired moisture level. Keep the electronics away from direct water contact; use the included jumper wires to mount the sensor remotely.\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 AOUT to A0 for analog readings. The digital output can go to any digital pin.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I calibrate the digital threshold?\u003c\/summary\u003e\u003cp\u003eTurn the potentiometer while the probes are in dry soil until the DOUT LED just lights up; insert into wet soil and adjust so the LED turns off. Repeat for precision.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWill the probes corrode over time?\u003c\/summary\u003e\u003cp\u003eNickel-plated probes resist corrosion, but constant wet soil can eventually degrade them. For long-term use, consider capacitive sensors or intermittent power to reduce electrolysis.\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":53445025038701,"sku":"CDN-0778","price":35.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/soil-moisture-sensor-module-analogdigital-output-adjustable-threshold-8742012.jpg?v=1790779868"},{"product_id":"elecrow-crowtail-capacitive-moisture-sensor-v20-for-arduino-iot-0039","title":"Elecrow Crowtail Capacitive Moisture Sensor V2.0 for Arduino \u0026 IoT","description":"\u003ch1\u003eElecrow Crowtail Capacitive Moisture Sensor V2.0\u003c\/h1\u003e\n\u003cp\u003eThe Elecrow Crowtail Capacitive Moisture Sensor V2.0 measures soil moisture by capacitance rather than resistance, avoiding electrode corrosion and delivering stable readings over time. Designed for Arduino, ESP8266, and other microcontrollers, it outputs an analog voltage proportional to moisture level, making it a reliable choice for automatic plant watering systems, greenhouse monitoring, and IoT agriculture 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\u003e3.3V – 5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput Signal\u003c\/td\u003e\n\u003ctd\u003eAnalog (0 – VCC)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eProbe Material\u003c\/td\u003e\n\u003ctd\u003eFR‑4 with capacitive traces\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eConnector Type\u003c\/td\u003e\n\u003ctd\u003eCrowtail (compatible with Grove)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e99mm × 20mm × 5mm (probe)\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\u003eAutomatic plant irrigation triggered by dry soil\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/arduino-soil-monitor-kit-with-ds18b20-and-sd-logger-greenhouse-ready\"\u003eLow‑power IoT soil monitor using ESP8266 and cloud logging\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eDIY smart greenhouse with multi‑zone moisture mapping\u003c\/li\u003e\n  \u003cli\u003eEducational kit for teaching analog sensor integration\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThe sensor works with any development board that accepts an analog input, including Arduino UNO, Mega, Nano, ESP32, ESP8266, and Raspberry Pi (via external ADC). Its 3.3V\/5V tolerance makes it safe for both logic levels. Pair it with Crowtail base shields or standard Grove‑compatible converters for plug‑and‑play wiring.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect the sensor’s VCC and GND to your board’s power, then attach the analog signal pin to any analog input (A0 on Arduino). Avoid submerging the top edge of the probe in water to keep the connector dry. Insert the probe fully into the soil for consistent 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 VCC to 5V, GND to GND, and the analog output to any analog pin such as A0. No additional libraries are needed—simply read the analog value.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow does capacitive moisture sensing differ from resistive sensors?\u003c\/summary\u003e\u003cp\u003eCapacitive sensors measure changes in dielectric constant rather than electrical resistance between electrodes. This eliminates direct current path through the soil, dramatically reducing probe corrosion and extending sensor life.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat output values represent dry vs. wet soil?\u003c\/summary\u003e\u003cp\u003eIn dry soil, the output voltage is high (close to VCC). As moisture increases, voltage drops. Actual thresholds vary; it’s recommended to calibrate by reading serial values when the probe is in dry soil and in water–logged soil.\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":53445084479853,"sku":"CDN-0039","price":220.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/elecrow-crowtail-capacitive-moisture-sensor-v20-for-arduino-iot-7142156.jpg?v=1790779626"},{"product_id":"float-sensor-switch-for-water-level-controller-compoden","title":"Float Sensor Switch for Water Level Controller - Compoden","description":"\u003ch1\u003eFloat Sensor Switch For Water Level Controller\u003c\/h1\u003e\n\u003cp\u003eA magnetic reed float switch that detects liquid levels in tanks and reservoirs. It closes a circuit when the float rises with water level, making it ideal for automatic pump control, overfill prevention, and level monitoring with microcontrollers like Arduino.\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\u003eSwitch Type\u003c\/td\u003e\n\u003ctd\u003eMagnetic Reed (Normally Open)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMaximum Voltage\u003c\/td\u003e\n\u003ctd\u003e100V DC\/AC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMaximum Current\u003c\/td\u003e\n\u003ctd\u003e0.5A\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-10°C to +85°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCable Length\u003c\/td\u003e\n\u003ctd\u003e30 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFloat Material\u003c\/td\u003e\n\u003ctd\u003ePolypropylene (PP)\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-water-tank-level-monitor-kit-v2\"\u003eAutomatic overhead tank pump controller that starts and stops based on water level.\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-water-level-alarm\"\u003eSump overflow alarm system using an Arduino to send alerts when water reaches a danger level.\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-aquarium-auto-top-off\"\u003eAquarium auto top-off device to maintain water level by triggering a small pump.\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-rainwater-harvesting-controller\"\u003eRainwater harvesting monitor that logs tank levels to the cloud via ESP32.\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis float switch outputs a simple closed\/open signal, working with any microcontroller that reads digital inputs, such as Arduino Uno, ESP8266, and Raspberry Pi Pico. Use a 5V–12V DC supply for signal circuits. Always add a 10kΩ pull-down resistor from the input pin to GND to prevent floating readings when the switch is open.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect one wire of the float switch to a digital input pin and the other to GND. Place a 10kΩ pull-down resistor between the input pin and GND so the pin reads LOW when the switch is open. When the float rises and closes the circuit, the pin goes HIGH. The switch is rated for signals only—use a relay module if you need to drive a pump or motor.\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, connect one wire to a digital pin with a 10kΩ pull-down resistor to GND, and the other wire to GND. Use digitalRead() to detect water level—HIGH means the float is up and the switch is closed.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan this switch directly control a water pump?\u003c\/summary\u003e\u003cp\u003eNo, the contacts are rated for 0.5A maximum, which is too low for most pumps. It should be used as a sensor to trigger a relay, MOSFET, or motor driver that handles the pump’s current.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs the switch normally open or normally closed?\u003c\/summary\u003e\u003cp\u003eThis float sensor is normally open (NO). The circuit closes when the float rises with water level. If you need a normally closed behavior, you can invert the logic in your code or wire a pull-up resistor instead.\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":53445102535021,"sku":"CDN-0329","price":110.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/float-sensor-switch-for-water-level-controller-compoden-7712358.jpg?v=1790779566"},{"product_id":"water-level-sensor-module-liquid-detection-for-arduino-esp32","title":"Water Level Sensor Module – Liquid Detection for Arduino \u0026 ESP32","description":"\u003ch1\u003eWater Level Sensor Module – Liquid Detection for Arduino \u0026amp; ESP32\u003c\/h1\u003e\n\n\u003cp class=\"product-lede\"\u003eThe Water Level Sensor Module detects liquid depth via a simple resistive trace, outputting a voltage proportional to water level, compatible with Arduino, ESP32, and Raspberry Pi for DIY and IoT projects.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable class=\"specs-table\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V – 5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003eAnalog (0 – 4.2V when powered at 5V)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSensing Area\u003c\/td\u003e\n\u003ctd\u003e40 mm × 16 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e62 mm × 20 mm × 8 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e3 g\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePin Count\u003c\/td\u003e\n\u003ctd\u003e3 (VCC, GND, OUT)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eFR4 with immersion gold coating\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDry Resistance\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;20 MΩ\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-water-level-indicator\"\u003e\n\u003cstrong\u003eWater Tank Level Indicator:\u003c\/strong\u003e Build a simple LED bar graph to show water level using Arduino Uno and this sensor.\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-hydroponic-water-level-monitor\"\u003e\n\u003cstrong\u003eSmart Water Level Monitor:\u003c\/strong\u003e Connect to ESP32 and Blynk to get real-time water level alerts on your phone.\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-automatic-plant-watering-system\"\u003e\n\u003cstrong\u003eAutomatic Plant Watering System:\u003c\/strong\u003e Use Raspberry Pi to control a pump based on soil moisture interpreted from this sensor.\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCBSE Physics Project:\u003c\/strong\u003e Demonstrate liquid-level sensing and analog data acquisition for CBSE practicals or ATL Tinkering Lab.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eB.Tech Final Year Project:\u003c\/strong\u003e Create a water pump automation system for agricultural use under Smart India Hackathon themes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003ctable class=\"compat-table\"\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003ePlatform\u003c\/th\u003e\n\u003cth\u003eCompatible\u003c\/th\u003e\n\u003cth\u003eConnection\u003c\/th\u003e\n\u003cth\u003eLibrary \/ Method\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eOUT to A0\u003c\/td\u003e\n\u003ctd\u003eanalogRead()\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Nano\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eOUT to A0\u003c\/td\u003e\n\u003ctd\u003eanalogRead()\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Mega 2560\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eOUT to any A pin\u003c\/td\u003e\n\u003ctd\u003eanalogRead()\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eESP8266 NodeMCU\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eOUT to A0\u003c\/td\u003e\n\u003ctd\u003eanalogRead()\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eESP32 Dev Board\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eOUT to any ADC pin\u003c\/td\u003e\n\u003ctd\u003eanalogRead()\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRaspberry Pi Pico\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eOUT to GP26 (ADC0)\u003c\/td\u003e\n\u003ctd\u003emachine.ADC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRaspberry Pi 4 \/ 5\u003c\/td\u003e\n\u003ctd\u003eYes with condition\u003c\/td\u003e\n\u003ctd\u003eVia MCP3008 ADC\u003c\/td\u003e\n\u003ctd\u003egpiozero or MCP3008 library\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWiring and Interface Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC to 5V (or 3.3V for 3.3V logic boards) and GND to ground, then link OUT to any analog input pin. The output withstands 5V logic but for 3.3V systems, power with 3.3V to get full-scale readings. Avoid leaving the sensor submerged for long periods, as moisture can cause corrosion on the exposed copper traces.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"faq\"\u003e\n  \u003cdiv class=\"faq-item\"\u003e\n    \u003ch3\u003eHow does this water level sensor detect liquid depth?\u003c\/h3\u003e\n    \u003cp\u003eIt uses a series of exposed copper traces that act as a variable resistor; when water touches more of the trace, resistance drops, creating a higher analog voltage output proportional to the wetted area.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"faq-item\"\u003e\n    \u003ch3\u003eCan I use this sensor to measure water level in a large tank?\u003c\/h3\u003e\n    \u003cp\u003eYes, but only within the sensing area; for deep tanks, mount it at the desired height and calibrate. It is not sealed against high pressure, so avoid full immersion beyond the marked sensing zone.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53454858617197,"sku":"CDN-0979","price":45.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/water-level-sensor-module-liquid-detection-for-arduino-esp32-2012175.jpg?v=1790779327"}],"url":"https:\/\/compoden.com\/collections\/soil-moisture-water-sensors.oembed","provider":"Compoden","version":"1.0","type":"link"}