Home / Wiring / CIT-1 Is the CIT-1 sensor high or low voltage? CIT-1 The CIT Sensor is LOW voltage. Underfloor Heating Thermostats Heated Floors Further Questions? Installation How far from the controller can the CIT-1 sensor be placed? Installation of the CIT-1 Miscellaneous questions At what temperature does the CIT-1 sensor activate? Wiring What gauge wire should be used for the CIT-1? Is the CIT-1 sensor high or low voltage?