The Garland 1920401 Thermocouple helps maintain safe and reliable burner operation by detecting the presence of a pilot flame in compatible GPD-48 and GPD-60 equipment. This 72-inch thermocouple generates a small electrical signal when heated by the pilot flame, allowing the connected gas safety valve to remain open while the flame is present. If the pilot flame goes out, the signal d... https://partsfe.ca/1920401-garland-thermocouple/2-1920401.html