The Vulcan Hart 00-920325 Thermocouple MGB/MGCB is a flame-sensing system that is available in gas-powered commercial cooking apparatus. It is mounted close to the pilot burner on ranges and griddles to sense the presence of heat and send a millivolt signal which keeps the gas valve open when the system is operating normally. In case the pilot flame is extinguished, the signal is term... https://partsfe.com/thermocouple-for-vulcan-part-00-920325