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मूल्य सूची: Retail Price (B2C) मूल्य सूची
HR202 Humidity Sensor Module Analogue/Digital Hygrometer for Arduino Projects

HR202 Humidity Sensor Module Analogue/Digital Hygrometer for Arduino Projects

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ComponentSpecification
Operating Voltage3.3V – 5V DC
Sensor TypeResistive Humidity Sensor (HR202)
Output TypeDigital Output (DO)
Detection Range20% – 95% RH
Response Time< 5 Seconds
Operating Temp-40°C to +85°C
Comparator ICLM393
AdjustmentOnboard Potentiometer
Price
₹ 55.08 ₹ 55.08
(Tax included)

Product Description

Monitor environmental conditions with precision using the HR202 Humidity Detection Sensor Module. This module utilizes an organic macromolecule resistance-type humidity sensor, making it highly sensitive to changes in air moisture levels. At Robogears, we recommend the HR202 for automated climate control systems due to its integrated LM393 voltage comparator, which provides a clean and stable digital signal. The board features dual output capability: a Digital Output (DO) for simple "on/off" triggering based on a set threshold and an Analog Output (AO) for more detailed humidity measurements. Whether you are building an automated greenhouse or a smart home weather station at your Pimpri facility, this compact sensor provides reliable humidity data with minimal power consumption.

Detailed Key Features

  • Dual-Output Flexibility: Offers both a digital trigger for high/low humidity alerts and an analog signal that can be mapped to precise percentage values via a microcontroller's ADC.

  • Adjustable Sensitivity: Features an on-board multi-turn potentiometer to manually set the humidity threshold for the digital switching output.

  • High-Stability HR202 Element: Uses a reliable resistance-type sensor that offers consistent performance across a wide 20% to 95% RH range.

  • Real-Time Status Monitoring: Equipped with dual LEDs—one for power status and another that illuminates when the detected humidity exceeds the set threshold.

  • Broad Compatibility: Operates on standard 3.3V to 5V logic, ensuring it works seamlessly with Arduino, Raspberry Pi, and ESP8266/ESP32 platforms.

All Technical Details

  • Interfacing: Standard 4-pin header (VCC, GND, DO, AO) for easy connection using female-to-female jumper wires.

  • Digital Logic: Output stays HIGH by default; drops to LOW when the humidity exceeds the potentiometer's setpoint.

  • Mounting: Includes a 3mm fixed bolt hole for secure installation in enclosures or on robot chassis.

  • Applications: Dehumidifier control, smart agriculture, laboratory environmental monitoring, and HVAC automation.

Prototyping & Engineering Tips (Robogears Exclusive)

  • Calibration Protocol: At our Pimpri lab, we suggest calibrating the sensor by placing it in a known environment (like a bathroom after a shower for high humidity) and adjusting the potentiometer until the signal LED just turns on.

  • Analog Mapping: When using the AO pin, remember that the output voltage is inversely proportional to humidity. You will need to create a mapping function in your code to convert the 0-1023 ADC values into actual RH% percentages.

  • Response Time: Resistance-type sensors like the HR202 can take a few seconds to stabilize after a sudden change in humidity. Avoid rapid "if-else" logic in your code; instead, use a 1-second delay between readings for better accuracy.

  • Contamination Warning: Avoid touching the HR202 sensor element directly with your fingers. Skin oils and salts can contaminate the macromolecule layer, leading to permanent measurement drift.

Package Includes

  • 1 x HR202 Humidity Detection Sensor Module

Image Disclaimer

Product images are shown for illustrative purposes only. The color of the PCB (typically blue) or the specific manufacturer markings may vary between batches, but the HR202 technical performance and dual-output functionality remain as described.