HR202 Humidity Detection Sensor Module for Arduino & IoT
HR202 Humidity Detection Sensor Module for Arduino & IoT
The HR202 is a resistive humidity sensor module that detects ambient moisture levels. It outputs an analog signal proportional to humidity, making it perfect for weather stations, greenhouse controls, and smart home automation. Its compact design integrates easily into microcontroller projects.
Key Specifications
| Specification | Value |
|---|---|
| Operating Voltage | 3.3V ā 5V DC |
| Humidity Range | 20% ā 90% RH |
| Accuracy | Ā±5% RH |
| Response Time | <10 seconds |
| Output Type | Analog resistance signal |
| Dimensions | 32mm x 22mm |
What You Can Build With This
- Indoor digital hygrometer
- Greenhouse climate monitor
- Smart bathroom mirror with fog alert
- Remote weather station node
Compatibility
This sensor works with any microcontroller that has an analog-to-digital converter (ADC), such as Arduino Uno, ESP32, and ESP8266. It can also interface with Raspberry Pi using an external ADC module like MCP3008. Operating voltage of 3.3Vā5V matches most development boards.
Wiring Notes
Connect VCC and GND to the board's power, and the analog output to an ADC pin. No pull-up resistor is needed; the sensor acts as a variable resistor. Keep the sensor exposed to air for accurate readings and avoid physical contact with the sensing element.
Why Buy from Compoden
Every 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.
Is this compatible with Arduino?
Yes, wire the analog output to any analog pin (A0āA5 on Uno) and read the voltage. Use a voltage divider if needed to scale the output.
How do I calibrate the HR202 for accurate readings?
Place the sensor in a sealed container with saturated salt solutions of known humidity (e.g., NaCl for 75% RH) and map the output voltage to those reference points.
Can I use it to measure soil moisture?
No, the HR202 is designed for ambient atmospheric humidity. For soil moisture, use a dedicated soil moisture sensor.
š¦ Free Setup Handoff Document Included
Every Compoden order includes a free setup handoff document ā 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.
Ask Soldr above what you can build with this ā it knows every Compoden kit this part appears in.
Shipping Information
- Prepaid Orders: ā¹75 for orders up to ā¹999, FREE shipping above ā¹999
- COD Orders: ā¹125 shipping + ā¹50 COD fee = ā¹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items