The Southbend 1161521 Thermocouple 30 provides reliable flame detection and temperature control for commercial gas appliances. This thermocouple functions by producing a small voltage when heated by the pilot flame, allowing the gas valve to stay open only when a flame is present. If the flame goes out, the voltage drops, automatically shutting off the gas supply to prevent leaks or h... https://partsfe.com/hd-thermocouple-for-southbend-part-1161521