Dwyer DH3 Digihelic Differential Pressure Controller

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Combines gauge, switch, and transmitter in a single unit. Displays pressure, velocity, volumetric flow operation in your choice of engineering units. Two SPDT control relays with adjustable deadbands, 4-20 mA output, and square root output for flow. Ranges from 0"-0.25" WC to 0"-100" WC. Accuracy ±0.5% to 1.5% depending on pressure range. CE approved. 

Discontinued and no longer available for sale.

Dwyer DH3 Digihelic differential pressure instrument combines a digital display gage, control relay switches, and a transmitter with current output packed in a Photohelic gauge-style housing. Reducing several instruments with one product, saves inventory, installation time, and money.

  • Typical applications: SCFM flow in ducts, filter status, static pressures in ducts or buildings, damper control, and fan control
  • Ranges from 0"-0.25" WC to 0"-100" WC. Bidirectional ranges also available
  • 4-20 mA output
  • For pressure, velocity and flow applications for air and non-combustible gases
  • Accuracy ±0.5% to 1.5% depending on pressure range
  • Diecast aluminum case and bezel
  • Backlit 4-digit LCD and LED indicators for setpoint and alarm status
  • 1/8" NPTF side or back process connections
  • CE approval

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