What is it

The XH-W3005 is a digital hygrometer / humidity control switch. It reads the current relative humidity (RH) and can turn a load (humidifier, dehumidifier, fan, etc.) ON or OFF depending on what RH thresholds you set.

Key Specifications

How to Use / Basic Operation

• Setting humidity thresholds: There are usually two settings: a “start” humidity and a “stop” humidity. When humidity drops below the start threshold, the controller can turn something on; when it exceeds the stop, it turns off (or vice versa depending on wiring / your load). 

• The “UP” and “DOWN” buttons are used to adjust the thresholds. Long pressing (≈3 seconds) allows the value to flash and then be changed. 

• Reset to factory settings by pressing both UP + DOWN together until the display shows “888”, then it returns to detection mode. 

Limitations / Cautions

• Because it’s direct-output, the load must not exceed the maximum current/power rating. Otherwise it can overheat, damage the controller, or be unsafe.

• The output end should be properly connected before powering on; if there’s no load or it’s improperly wired, there could be arcing or sparks.

  The sensor accuracy (±2%) means you may see small errors; for very tight humidity control you might need calibration or a better sensor.

• The environment (heat, dust, water, etc.) around the sensor and controller should be controlled to avoid damage or false readings.