Product: Gas Thermopile Temperature Sensor (pilot‑type) Key benefits Reliable flame sensing and safety: generates the necessary voltage to confirm pilot flame presence and keep gas controls operating safely. Wide compatibility: designed for use with gas fireplaces, water heaters and fryers; commonly installed with a pilot light assembly for proper operation. Durable, long-lasting construction: robust body resists wear from regular use while maintaining sensitivity and measurement accuracy. Straightforward replacement: functionally equivalent to original components even if the external appearance differs, ensuring seamless integration and consistent performance. What it does (function and performance) Thermopile sensor that converts pilot flame heat into electrical output used by gas control systems. Minimum output requirement: produces at least 750 mV when functioning correctly. Start-up requirement: the thermopile must be heated to at least 700 C during initial ignition; voltage should then increase gradually during normal operation until the system reaches the required running voltage. Compatibility and fit Intended for a broad range of gas appliances including but not limited to gas fireplaces, tank-type water heaters and commercial or residential fryers. Typically installed as part of a pilot assembly; compatible with control valves and safety circuits that accept a thermopile-type flame sensor. Note: replacement units may look different externally but are manufactured to match the functional specifications of original components. Durability and quality Constructed with a stable body designed to withstand regular thermal cycling and mechanical handling without loss of sensitivity or accuracy. Built to provide reliable, repeatable voltage output over extended service life under typical operating conditions. Typical use scenarios 1) Gas fireplace pilot replacement: restores flame-detection and safety interlock function so the fireplace will hold gas flow only when the pilot is lit. 2) Water heater pilot assembly repair: replaces a failing thermopile to re-enable pilot sensing and reliable ignition control on gas hot-water systems. 3) Fryer pilot/safety maintenance: used in commercial or home fryers where a pilot‑type flame sensor is required for safe operation and gas control. Installation and troubleshooting notes Install in the pilot assembly per appliance manufacturer instructions. Verify pilot flame heats the thermopile to the specified temperature so it can produce the minimum 750 mV output. If the voltage does not reach 750 mV after the sensor is heated, check pilot flame size and position, wiring and control valve compatibility. This thermopile temperature sensor provides a durable, compatible and functionally equivalent replacement for pilot‑based gas appliance flame sensing, ensuring continued safe operation when installed and operated according to appliance requirements.