AEM offers both RTD and K-Type Thermocouple exhaust gas temperature(EGT) sensors.PN 30-2050 is a RTD type EGT sensor with an inconel body, M14 x 6H. It includes an RTD temp sensor with male thread, a weld-on bung with female thread, connector and pins.PN 30-2065 is a K-Type, closed tip thermocouple sensor. It includes a closed tip TC sensor with an inconel sheath, 1/8" NPT compression fitting, and ring and terminal harness. NOTE: For the most accurate readings using a K-Type thermocouple sensor, see our 4-Channel K-Type Thermocouple Amplifier, PN 30-2204.http://www.aemelectronics.com/files/instructions/30-2050%20RTD%20Temperature%20Sensor%20Kit.pdf