Dwyer DM-002 DigiMag Differential Pressure Transmitter, 0.25 inWC

Dwyer DM-002 DigiMag Differential Pressure Transmitter, 0.25 inWC

  • Model: DM-002

Senses the pressure of air and compatible gases, this differential pressure transmitter features a pressure range of 0.25 inWC and has a 4 to 20 mA output. Fast and easy to set up, this transmitter is suitable for fan control, static pressures in ducts or buildings, room pressurization monitoring, and differential pressure across filters.

Dwyer DM-002 Offers

Specifically designed to mount in a standard Magnehelic® gauge cutout, this pressure transmitter features a polycarbonate molded housing with integral pressure connections, reducing installation time. In addition, the digital push-button zero and span simplify calibration over typical turn-potentiometers, and a single push-button allows field selection of multiple engineering units.


  • 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® gauge, as both use the same diameter cutout


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

Dwyer DM-002 Specifications

Service Air and non-combustible, compatible gases
Pressure Range 0.25 inWC
Accuracy ±2% FSO
Stability <±1%/year FSO
Limits Pressure: 3.6 psi maximum operation, 6 psi burst
Temperature: -4 to 158°F (-20 to 70°C)
Thermal Effect 0.02% FS/°F (0.036% FS/°C)
Output Signal 4 to 20 mA (2-wire)
Zero and Span Adjustments Push-button
Loop Resistance 0 to 1250 Ω maximum
Current Consumption 21 mA maximum
Connections Electrical: Screw-type terminals
Process: Male ports on side for ⅛”, 316“, ¼”, 0.2″ (5 mm), 0.23″ (6 mm) ID flexible tubing
Power Requirements 10 to 35 V DC (2-wire)
Enclosure Rating NEMA 4X (IP66)
Mounting Orientation Not sensitive to position
Agency Approvals CE
Housing Material Polycarbonate
Dimensions Ø5 x 1.9″ (Ø127 x 48.2 mm)
Weight 7.04 oz (200 g)

What’s included with the Dwyer DM-002

  • Dwyer DM-002 DigiMag Differential Pressure Transmitter, 0.25 inWC