The Baso K16BT-30 Penn Thermocouple is a 30-inch flame-sensing safety device designed to ensure reliable operation of gas-fired HVAC equipment. It works by generating a millivolt signal when heated by the pilot flame, allowing the gas valve to remain open only when proper ignition is confirmed. Visit The Website: https://www.partshnc.com/k16bt-30-baso-gas-products-penn-thermocoupl... https://www.partshnc.com/k16bt-30-baso-gas-products-penn-thermocouple-30