Dungs 217-332A Differential Pressure Switch with 12" to 60" WC range. The alternate model number is 266938 and part of AA-A2-6.
The Dungs AA-A2-6 switch is designed for making and/or breaking a circuit when the medium pressure changes relative to the set point. These switches feature NPT threaded connections and also a test button in the lower housing.
The AA-A2-6 threaded version is equipped with a test button that when pressed interrupts the connection to the 1/4" NPT pressure connection and relieves the pressure below the diaphragm. The microswitch changes the pressure contact position from Normally Open to Normally Closed. When released, the pressure below the diaphragm builds again and the microswitch returns to its original position.
| 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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