The control mode options include factory selected combinations of ON/ OFF, time proportioning, PI using manual reset and full PID. Input for the Series 160 is a relative humidity/ temperature sensor. Features include mechanical relay outputs, remote setpot, optional remote digital displays, and various cable lengths to accommodate remote sensor location. The Series 160 is also available as a RH/Temperature signal conditioner only, that can be interfaced to other Watlow controls. Specifications