Humidity Sensor Controlled Relay Module

 

Humidity Sensitive Relay Module 5V can automatically control a load such as a fan or misting pump based on the humidity level.  It is a standalone switching module that turns on/off a relay based on Just add 5V power and connect the load you want to control and adjust the potentiometer to set the humidity level you want the relay to switch ON/OFF.

  

Humidity value in greenhouse or aquarium room It can be used for applications such as automatically turning on a fan when it rises above a preset level, or turning on a steam system for orchids when the humidity drops below a preset level.