This Stack electronic,professional exhaust gas temperature gauge combines digital microprocessor accuracy with a high precision stepper motor movement to provide excellent accuracy and reliability. White LED back lighting and an illuminated needle ensure the 270 degree dial is easy to read both day and night. An exhaust gas temperature gauge is a very useful tool for engine tuning as it can highlight fueling problems, especially on turbo charged cars.Fast, smooth and accurate stepper motor needle driveLED white back light with illuminated needle for excellent night time visibilityIntegrated EGT thermocouple sensor probe52mm gauge diameterChoice of dial face colour and °C or °F scalesThe Stack professional exhaust gas temperature gauge is supplied with a wiring harness and a thermocouple sensor probe and adaptor with a 1/8" NPT male thread. Adaptors for other thread types are available to purchase separately.