DWYER Series DM DigiMag® Differential Pressure Transmitter

RM 0.00


Series DM DigiMag® Differential Pressure Transmitter

Same Size as Standard Magnehelic® Differential Pressure Gage

The Series DM DigiMag® Differential Pressure Transmitter senses the pressure of air and compatible gases and sends a standard 4-20 mA output signal. The DM housing is specifically designed to mount in the same diameter cutout as a standard Magnehelic® gage. A wide range of models are available factory calibrated to specific ranges. The polycarbonate molded housing features integral pressure connections, which reduces installation time. Digital push-button zero and span simplify calibration over typical turn-potentiometers. A single push-button allows field selection of 4 to 6 engineering units, depending on the range.

Product Applications

  • Differential pressure across filters
  • Fan control
  • Static pressures in ducts or buildings
  • Room pressurization monitoring



  • Reduced installation time through zero and span controls that provides quick and easy calibration
  • Fast and easy setup and calibration with push-button zero and span controls
  • Immediate corrective action can be taken by local alerts via the easy-to-read LCD display
  • Reduces upgrade installation costs and simplifies field upgrade from a Magnehelic® gage, as both use the same diameter cutout



  • Service: Air and non-combustible, compatible gases.
  • Wetted Materials: Consult factory.
  • Housing Material: Polycarbonate.
  • Accuracy: ±1% FSO for all ranges except 0.25 in w.c. @ ±2% FSO, and ranges at or below ±0.1 in w.c. @ ±4% FSO.
  • Stability: < ±1%/year FSO.
  • Pressure Limits: Ranges > 1 in w.c.: 6 psi max operation, 6 psi burst; Ranges = 1 in w.c.: 3.6 psi max operation, 6 psi burst.
  • Temperature Limits: -4 to 158°F (-20 to 70°C).
  • Thermal Effect: 0.036% FS/°C (0.02% FS/°F).
  • Power Requirements: 10-35 VDC (2-wire).
  • Output Signal: 4-20 mA (2-wire).
  • Zero and Span Adjustments: Push-button.
  • Loop Resistance: 0 to 1250 Ω max.
  • Current Consumption: 21 mA max.
  • Electrical Connections: Screw-type terminals.
  • Process Connections: Male ports on side for 1/8″, 3/16″, 1/4″, 5 mm, 6 mm ID flexible tubing.
  • Enclosure Rating: NEMA 4X (IP66).
  • Mounting Orientation: Not sensitive to position.
  • Size: 5″ OD (127 mm) x 1.9″ (48 mm) deep.
  • Weight: 7.04 oz (200 g).
  • Agency Approvals: CE.