Tekmar Controls 069 Boiler Flue Sensor

The Tekmar Controls 069 Boiler Flue Sensor measures exhaust gas temperatures within boiler venting passages. Inserted directly into the boiler flue pipe or exhaust manifold of high-efficiency heating systems, the high-temperature sensing probe monitors thermal conditions of exiting combustion gases. The sensor outputs real-time resistance readings to the boiler reset control board to track continuous combustion performance and heat exchanger thermal efficiency in HVAC systems. Monitoring flue temperatures enables heat exchanger protection, assists rapid system fault detection, and supports safe boiler activation sequences.