The spark plug should not only bear the rapid change of temperature shock, pressure shock and chemical corrosion in the combustion chamber, but also be able to withstand at least 30 thousand volts of high pressure ignition pulse. Therefore, the spark plug
EGT thermocouple sensor is mainly for Auto industry and testing temperature of exhaust gas.The common used mark is K type, with different sheath material, it could test temperature up to 1000C.