The Keating 002567 Coaxial Thermopile is a 36-inch component designed to convert heat energy from a pilot flame into electrical voltage within a 250–750mV range. It works by using multiple thermocouples connected in series to produce sufficient power to operate gas valves without an external electrical source. This allows the system to maintain proper gas flow only when a stable flame... https://partsfe.ca/002567-keating-thermopile