Exhaust Gas Temperature Probe (EGT)Extreme Duty Fast Response EGT Temperature Probe Type K thermocouple probe Exposed sensing junction for fastest response Includes 316 SS adjustable compression fitting Stainless steel protected wires Designed for extreme engine test & racing environments When using this with an ECU other than the Thunder, you will need to use an amplifier. SpecificationsThermocouple type: KRange: 148 to 2372F ( 100 to 1300C)Accuracy: + 0. 4% of reading or about + 1.