Homeowners and repair technicians, this thermal coupler thermopile is exactly what you need to get your gas appliances working again! This 36-inch thermopile generates 750mV and features a metal internal resistor rated for 25°C. The construction uses glass fiber-covered wire and metal aluminum-covered wire that's completely harmless to humans. It's designed with high sensitivity and a sturdy body structure that stands up to the heat and demands of gas appliances. The 1/4-inch CCT LP burner assembly works with various furnace, fireplace, and water heater models. It comes in different resistance ranges between 1,500 mΩ and 4,500 mΩ to match your specific needs, with normal operating temperatures around 700-750°C. Weighing only about 40 grams, it's lightweight and easy to carry to job sites. This universal replacement works with multiple model numbers including 5009611, 5009622, 3509612, 5009612, 5009621, 3509611, 3509622, 3509621, 2509612, 2509611, 2509622, and 2509621. While it might look slightly different from your original part, it's functionally equivalent and will get your LP or NG ignition burner working properly again. Whether you're dealing with a faulty fireplace, furnace, or water heater, this thermopile delivers reliable performance to restore your appliance's ignition system. The quality construction ensures it will last through years of service once installed.