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this specific cartridge is strictly an electrochemical sensor for Oxygen (O2)
Integrated flow control and mesh strainer protect sensitive downstream components from waterborne contaminants
This manifold adapter for standing pilot systems is compatible with several Williams wall heaters and counterflow models
ensuring the Knight KH285 boiler operates within its designated CO2 and O2 parameters
Utica-Dunkirk 28687 Flame Sensor 321142-301 this specific cartridge is strictlyThe Utica Dunkirk 28687 Flame Sensor is a critical safety component engineered for precise flame rectification in high efficiency residential and commercial gas fired boilers and furnaces. Designed for compatibility with various Utica and Dunkirk heating systems, this OEM replacement flame sensor monitors the burner assembly's combustion process by converting AC voltage into a measurable DC microamp signal. A veteran tech knows that a reliable