1、This air pressure controller is used for the differential pressure control of positive pressure air supply system. 2、With high accuracy, the differential pressure controller enables sensitive sensing as well as real time control. 3、Not only has zero point, full scale and temperature compensation, but also has passive switch output control. 4、Ensures secure and stable working under 24V DC power, and the simple wiring makes the installation easier. 5、Use optional two bus power supply and communication or 485 communication mode, very easy to operate. 1 x Differential Pressure Controller1 x Hose1 x Accessory2 x Screw2 x Bolt Item Type: Differential Pressure ControllerPressure Range: -100~+100 paAccuracy: ± 1.0%F.SPower Supply: 24Vdc ± 2.4VOperating Temperature: -10-60℃Ambient Temperature: -20℃-85℃Air Pipe Connection: (+) high pressure end, (-) low pressure end; adopt 3.5mm / 0.1in(approx.) inner diameter hose. Instruction: Green status, red alarm indicator. Display Mode: With display. Measuring Medium: For air and non corrosive gas. Control Signal: SwitchCommunication Mode: Two bus (two wire system). Protection Grade: IP30Withstand Pressure: 1000Pa.