The Comstock Castle COM17005 Thermocouple 18" is designed to support the safe and reliable operation of compatible commercial gas cooking equipment. It works by sensing the heat from the pilot flame and producing a small electrical current that keeps the gas valve open while the flame is burning. If the pilot flame goes out, the thermocouple stops generating the signal, causing the ga... https://partsfe.com/com17005-comstock-castle-thermocouple