{"product_id":"hr202-resistive-humidity-sensor-analog-output-20-95-rh","title":"HR202 Resistive Humidity Sensor – Analog Output 20-95% RH","description":"\u003ch1\u003eHR202 Resistive Humidity Sensor – Analog Output, 20-95% RH\u003c\/h1\u003e\n\n\u003cp\u003eThe HR202 resistive humidity sensor detects relative humidity by changing its resistance in response to moisture levels. It provides an analog voltage output proportional to humidity, making it easy to interface with a microcontroller’s ADC for environmental monitoring projects. This sensor is widely used in climate control, agriculture, and DIY weather stations.\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\u003eHumidity Range\u003c\/td\u003e\n\u003ctd\u003e20% – 95% RH\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e±5% RH (at 25°C, 60% RH)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003eAnalog voltage (0-3V typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eResponse Time\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;10 seconds (63% step change)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e0°C – 60°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-automated-plant-watering\"\u003eAutomated plant watering system that waters when soil moisture drops\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-animated-weather-station-display\"\u003ePortable weather station with LCD display for temperature and humidity\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eSmart bathroom exhaust fan that activates at high humidity levels\u003c\/li\u003e\n  \u003cli\u003eIoT greenhouse humidity logger using ESP8266 and cloud dashboard\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThe HR202 operates with any microcontroller that has an analog-to-digital converter (ADC). It works seamlessly with Arduino Uno, Nano, Mega, ESP32, ESP8266, and Raspberry Pi (via external ADC like MCP3008). Supply voltage of 3.3V to 5V allows direct connection without level shifting in most cases.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC to 5V (or 3.3V), GND to common ground, and the analog output pin to any analog input on your microcontroller (e.g., A0 on Arduino). No pull-up resistor is needed for standard modules. For bare sensor elements, use a 10kΩ resistor in a voltage divider configuration.\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 3-5 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 HR202 outputs an analog signal that can be read by any Arduino board's analog input pin (A0-A5). Simply connect VCC to 5V, GND to GND, and OUT to A0, then use analogRead() in your sketch.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow can I convert the analog reading to humidity percentage?\u003c\/summary\u003e\u003cp\u003eThe sensor’s datasheet provides a conversion curve, but a common approach is to calibrate it against a known humidity source and map the ADC values to 0-100% RH using linear or polynomial approximation in your code.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan this sensor detect condensation or dew?\u003c\/summary\u003e\u003cp\u003eThe HR202 is not designed for condensation; direct water contact may damage it or cause inaccurate readings. It works best in air where humidity stays below 95% RH without condensation.\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":53444956881261,"sku":"CDN-0282","price":40.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_9cf3d297-0dcd-4b9e-b7c1-80660e81dee9.jpg?v=1781512395","url":"https:\/\/compoden.com\/products\/hr202-resistive-humidity-sensor-analog-output-20-95-rh","provider":"Compoden","version":"1.0","type":"link"}