Quick Menu Wiring What gauge wire should be used for the CIT-1? Is the CIT-1 sensor high or low voltage? Installation Installation of the CIT-1 How far from the controller can the CIT-1 sensor be placed? Miscellaneous questions At what temperature does the CIT-1 sensor activate? At what temperature does the CIT-1 sensor activate? The CIT-1 sensor activates when temperatures drop to 38 degrees or less.