The Vulcan Hart VH20040 Thermocouple helps support safe and reliable burner operation by monitoring the presence of a flame in compatible gas-powered equipment. This 24-inch thermocouple is designed for 1980 Series snap-fit applications and generates a small electrical signal, typically between 20 and 30 millivolts, when heated by the burner flame. That signal helps keep the gas valve... https://partsfe.ca/vh920040-vulcan-hart-thermocouple