Easy Low Cost Humidity Control

Made in the USA

Sentry Humidistat 101 

Programmable options built in but not needed for basic operation.


In Stock  


Fully integrated humidity control for switching 120VAC power to an alarm, heater, fan, pump, motor, lamp, or other device.


                Comes with a 3' AC power input cord
  2 line LCD backlit display 
  3 button (UP, DOWN, and ENTER) input panel
  Mounting flange
  Comes with factory presets (no programming needed)
  Programming options (if desired)
  • Hysteresis
  • Averaging
  • Alarm delay
  • Calibration
  • Password
  • Fan on/off
  • Relay on over/under
  • Default reset




  Ground and Neutral pass through

Switched "Hot" lead




Design Considerations

The Humidistat 101 is a low cost way to switch on or off a humidifier, de-humidifier, fan, blower, heater, or other device based on ambient humidity.

The Sentry Humidistat is self-contained and fully integrated.  

The Sentry Humidistat should not be used as a sole control element in applications of safety or critical function. These applications should always be designed with redundancy.

Caution: Putting a short or greater than a 5A load on the output may damage the unit.



EMS  47745 - 193rd St. Toronto SD 57268 USA (605) 794-2072 (P)     (605) 794-2073 (F)  email