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  • Air and non-combustible, compatible gases
  • Ranges: 0.25 up to 100 inH2O
  • ±0.5% accuracy
  • NEMA 4 (IP66) housing
  • 4 digit backlit LCD 0.6" display
  • Square root output for flow
  • Aluminum, glass housing materials
  • 1/8" female NPT process connection
  • Modbus RTU, RS485, 9600 baud communications
  • CE and UL agency approvals


The Dwyer Digihelic II Differential Pressure Controller combines the 2 SPDT control relays, 4-20 mA process output and Modbus communications with a large, brightly backlit 4 digit LCD display that can easily be seen from long distances. The electrical wiring has also been enhanced in the DHII with its detachable terminal blocks. The removable terminals allow the installer to easily wire the terminal block outside the housing and then attach to the circuit board, reducing wiring difficulties and installation time in the process.

The Digihelic II Differential Pressure Control in the new NEMA 4 (IP66) enclosure enables this product to be the perfect choice when mounting pressure controls outdoors in such applications as rooftop air handlers. This housing also makes it the ideal solution for surface mounting in clean rooms or facilities where water or a cleaning solution is utilized in maintaining plant cleanliness.