Dual Electric Fan Adjustable Controller Thermatic Switch RelayNew Davies Craig digital thermatic fan switch kit for single or dual fans. The digital thermatic fan switch kits sense air temperature as it passes through the radiator with the sensor placed in the fin section. The sensor can also now be placed directly into the coolant systemin combination with a temperature sensor adapter kit. These fan switch assemblies are compatible with 12 or 24 V applications, and feature an adjustable range of 40 to 110 C, or