The B39 controller is both a humidistat and a dehumidistat. It can be changed from humidify to dehumidify and back with the flip of a switch. In Humidify mode, it can be used to turn on a device like a hydrofogger or control valve to a misting system when the humidity level drops below the level you select. In Dehumidify mode, the controller can turn on a circulation fan, exhaust fan, or dehumidifier when the humidity level rises above the selected level. No wiring is necessary. Simply plug the device you want to control into the plug on the B39 controller, and select the percentage of humidity you want to maintain. Comes with 6' power cord. 30% - 100% humidity range. 

Direct plug in: Fans, Humidifiers, Misting systems, Heaters

Operates on 110/120 voltage up to 15 amps. 1/2Hp

Storage Temperature: -40 to 120 F.
Operating Temperature: 40 to 110 F.

Selector:  Humidifier or Dehumidifier Mode

Adjustable range 30 to 100% RH   Accuracy 3%

Delivery of this item min. 8 days