Davies Craig Fan control Davies Craig fan control with relays to suit their own fans, water pumps and also other people's fans. Perfect for those of you who have not programmed the cooling fans into your ECU and want a simple but effective solution to control the fans. The sensor, a temperature probe (air or coolant connection) detects the air temperature as it passes through the radiator with the sensor placed in the radiator flange section or the sensor can also be placed directly in the coolant system in combination with a temperature sensor adapter. The cable length to the sensor is 320 cm in total (cable from switch 290 cm plus sensor connector 30 cm) The switch can drive 1 or 2 fans and be used for 12 or 24 volt applications. (Note only 12v relays included) It has an adjustable temperature range of 40ºC to 110ºC (104ºF to 230ºF) which can display Celsius or Fahrenheit. Fan #1 starts when the temperature reaches the set temperature. Fan #2 (if 2 is present) starts operation 10 sec