HR202 Humidity Sensing Sensor Module

The HR202 Humidity Sensing Sensor Module is a resistive-type humidity sensor (one that changes electrical resistance with moisture levels) that outputs an analog signal (a continuously varying voltage) readable on any microcontroller ADC pin. The hr202 humidity sensor works at 3.3V to 5V, so it connects directly to Arduino and ESP32 boards without a level shifter.

A non-obvious detail is that the HR202 measures relative humidity (the percentage of moisture in air compared to its maximum capacity at that temperature). Many beginners confuse relative humidity with absolute humidity. The honest limitation is that this sensor only outputs a raw analog value, so you need a calibration curve from the hr202 humidity sensor datasheet to convert readings into accurate percentage values.

Students and engineers using hr202 humidity sensor arduino setups can get started quickly. Connect VCC and GND, then read the analog output pin in your Arduino IDE sketch. StemVolt provides this sensor with trusted quality, ensuring reliable performance and easy usability.

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Features:

• Response time under 5 seconds catches fast humidity changes in the monitored area
• Analog signal output feeds directly into any ADC pin for simple code-based reading
• Operating temperature of -40°C to 85°C makes it usable in cold storage and outdoor builds

Technical Specifications:

Applications:

• A home weather station uses this to show indoor humidity on an LCD screen
• An hr202 humidity detection sensor reads analog output on ESP32 and sends data over WiFi
• An industrial cold storage unit monitors humidity levels and triggers a fan when values rise

Package Includes:

• 1 x HR202 Humidity Sensing Sensor Module