Karl Dungs AA-A4 Series air pressure switches are used for differential pressure monitoring in firing, ventilation and air-conditioning systems. It can be used as a pressure, vacuum, or differential pressure switch for air and non-aggressive gases, though they are not suitable for natural gas, propane, butane or other combustable gases.
These switches are field adjustable and are compact, and are generally used for automatic burner controls. They are available with hose or NPT threaded connections.
The AA-A4-4 switch is suitable for making or breaking a circuit when the medium pressure changes relative to the set point, and it features a hose connection.
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| Maximum Operating Pressure | 7 PSI (500 mbar) |
|---|---|
| Enclosure Rating | NEMA Type 4 |
| Ambient Temperature Rating | -40 °F to +140 °F (-40 °C to +60 °C) |
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