The Davies Craig digital fan switch (#0444) can be used with electric fans or electric water pumps. The sensor, a temperature probe (for air or coolant) senses air temperature as it passes through the radiator with the sensor placed in the radiator fin section or the sensor can also be placed directly into the coolant system
*Note: If using this switch for use with DC EWP's, it will not vary the speed of the pump in response to engine temperature but rather turn the pump on and off at your set temperature. For EWP control, we would recommend part number 8002 which can manage both the EWP and your thermatic fans