The Imperial 30030 Thermocouple helps monitor burner flame conditions and support reliable gas equipment operation. This replacement thermocouple measures 18 inches and produces approximately 20–30 mV when heated by the pilot flame. During operation, the heated thermocouple generates a small electrical signal that helps keep the gas safety valve open when sufficient flame is present. ... https://partsfe.ca/thermocouple-for-imperial-part-30030