Home / Wiring / CIT-1 At what temperature does the CIT-1 sensor activate? CIT-1 The CIT-1 sensor activates when temperatures drop to 38 degrees or less. Underfloor Heating Thermostats Heated Floors Further Questions? Preparing for your project What kind of heating is the 7iE compatible with? What is the maximum load of the 7iE Thermostat? What are the dimensions of the 7iE Thermostat? Wiring What is the maximum load of the 7iE Thermostat? Can I upgrade to the 7iE? What gauge wire should be used for the CIT-1? Is the CIT-1 sensor high or low voltage? Installation Can I upgrade to the 7iE? How far from the controller can the CIT-1 sensor be placed? Installation of the CIT-1 Miscellaneous questions Can I upgrade to the 7iE? At what temperature does the CIT-1 sensor activate?