The sensor is used to check humidity level. When the level set with the potentiometer is exceeded, the LED lights up and the relay contacts are switched. The device does not require additional elements such as a microcontroller or a driver. Technical data and product features High-quality sensor HR202 is used Humidity threshold adjustment potentiometer PCB dimensions: 50 x 26 mm, thickness 19 mm, 4 mounting holes convenient installation Supply voltage 5V Technical data of the sensor HR202 Working frequency: 500Hz - 2kHz Middle value: 31kOhm (at 25 degrees C, 1kHz, 1V AC, 60% RH) Operating range: Humidity: 20-95% RH Temperature: 0-60 degrees. C. Accuracy: +/- 5% RH Hysteresis: +/- 1% RH Response time: <10s https://elecena.pl/product/22620570/hr202-humidity-sensor-with-10a-250v-ac-relay 2023-02-22 https://elecena.pl/product/22620570/hr202-humidity-sensor-with-10a-250v-ac-relay 2025-10-29