The Garland 4523505 Range SIT Thermocouple (18") provides dependable flame sensing and gas control for commercial kitchen ranges, ensuring safe and efficient operation. This thermocouple works by producing a small voltage when heated by a pilot flame, which keeps the gas valve open; if the flame goes out, the voltage stops, automatically shutting off the gas flow to prevent leaks. Des... https://partsfe.com/metric-thermocouple-18-for-garland-part-4523505