Specifications: Length 24” Rating: 750 mv The thermopile is used with 750 millivolt pilot systems. This system is generally found on gas fireplaces and gas logs that use wall switches or remote controls. This equipment is a kind of cobination type thermocouple, provides power for 250/750 millivolt self-generation control systems. a. Internal resistance (25°C), varies with specifications and length between 1,500 mΩ and 4,500 mΩ. b. Normal working temperature 700-750°C. c. Connecting type: spiral type and two-pole plug-in type. d. Lengths: 24 inches （609mm） 750 Millivolt Replacement Thermopile Generators have long been used in self-powered heaters and hot water equipment. It has been proven in millions of appliances as the contractor's preferred thermopile and are found in many of today's self powered gas fireplaces. From the Manufacturer Millivolt Replacement Thermopile Generators have long been used in self-powered heaters and hot water equipment. The Honeywell CQ200A has been proven in millions of appliances as the contractor's preferred thermopile and are found in many of today's self powered gas fireplaces. from shop METER STAR COMPONENTS STORE