The Cecilware F178A Thermopile is a reliable sensing component designed to generate electrical voltage from heat to support safe and consistent operation of gas-powered equipment. This two-lead thermopile converts thermal energy from a pilot flame into a 250–750 millivolt output, which is used to power safety controls and regulate gas flow. Featuring a durable 36-inch lead length, it ... https://partsfe.com/thermopile-for-cecilware-part-f178a