The Photohelic series A3000 is a versatile 2-in-1 instrument combining a time-proven magnehelic differential pressure gage with low and high pressure switches. It's designed to measure and control positive, negative and differential pressure of air or other non-combustible, non-corrosive gases. Gage reading is unaffected by switch operation. Switch set points are easily adjusted with knobs located on gage face. Applied pressure and switch set points are fully visible at all times. Deadband is one pointer width less 1 percent of full scale. Each set point controls a DPDT relay and both relays can be interlocked to provide variable deadband control.

 

Temperature limits: 20 degrees to 120 Fahrenheit