TheHHC-2 controller is used for the control of Humidifying and Dehumidifying equipment. It has a 0-10VDC direct acting output and a 0-10VDC reverse acting signal as well as Humidifying and Dehumidifying ON/OFF relays. TheHHC-2 uses a two wire 4-20 mA type Humidity Sensor and derives its power supply for this sensor from terminals G1 & B. Switch on points for all outputs are fully adjustable on the controller fascia.