266911 – Dungs AA-A2-4-3 Air Pressure Switch, 0.4-4″ W.C.

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Dungs AA-A2… Differential Air Pressure Switches are field adjustable, compact pressure switches for automatic burner controls. Available with hose or NPT threaded connections.

The AA-A2-4… differential pressure switches are suitable for making and/or breaking a circuit when the medium pressure changes relative to the setpoint.  The AA-A2-4… versions feature hose connections.

Differential pressure monitoring in firing, ventilation and air-conditioning systems. The AA…A2/A4 can be used as a pressure, vacuum or differential pressure switch for air and nonaggressive gases. Not suitable for natural gas, propane, butane and other combustible gases.