Key Benefits Precise Switchover Control: Maintains consistent performance within the 11 to 15 psig range for accurate pneumatic air switching

reducing labor time during field mounting

Always verify your serial number and fuel type before installation

The GN series utilizes updated materials for better thermal resistance and longevity compared to the discontinued GF series while maintaining identical mounting dimensions

Lochinvar & A.O. Smith 100112678 Flame Sensor 323613-751 Key Benefits Precise Switchover Control:The Lochinvar & A. O. Smith 100112678 Flame Sensor is a critical OEM safety component engineered for precise flame rectification in high efficiency boilers and water heaters. Designed for Lochinvar Knight and A. O. Smith B4940, B5930, B5940, and B7930 series units, this sensor monitors the burner's ionized path to ensure the gas valve remains energized only when a stable flame is present. Constructed with a high grade Kanthal or equivalent alloy rod