Dwyer Series 605 Magnehelic® Differential Pressure Indicating Transmitter

The Series 605 Magnehelic® Indicating Transmitter provides for both visual monitoring and electronic control of very low differential pressure. The Series 605 is ideal for control applications in building HVAC systems where local indication is desired during routine maintenance checks or necessary when trouble shooting the system. The easily read dial gage is complimented by the two-wire, 4 to 20 mA control signal utilizing the time-proven Dwyer® Magnehelic® gage mechanical design and Series 600 transmitter technology. The two-wire design with terminal strip on the rear simplifies connection in any 4 to 20 mA control loop powered by a 10 to 35 VDC supply.

Please see Series AT2605 for ATEX approved.

Product Applications

  • Monitor pressures in ducts, rooms, or total building pressures
  • Filter monitoring
  • Local indication of clean room pressures with process signal sent to control room


Service : Air and non-combustible, compatible gases.

Wetted Materials : Consult factory.

Accuracy : See Ordering page.

Stability : ±1% FS/yr.

Pressure Limits : See Ordering page.

Temperature Limits : 20 to 120°F (-6.67 to 48.9°C).

Process Connections : 1/8″ female NPT.

Size : 4″ (101.6 mm) dial face, 5″ (127 mm) OD x 2-11/16″ (68.3 mm).

Weight : 1 lb, 12.6 oz (811 g).

Agency Approvals : CE.


Accuracy : See Ordering page (includes linearity, hysteresis, and repeatability).

Temperature Limits : 20 to 120°F (-6.67 to 48.9°C).

Compensated Temperature Range : 32 to 120°F (0 to 48.9°C).

Thermal Effect : ±0.025% FS/°F (0.045% FS/°C).

Power Requirements : 10 to 35 VDC (2-wire).

Output Signal : 4 to 20 mA.

Zero and Span Adjustments : Protected potentiometers.

Loop Resistance : DC: 0 to 1250 Ω maximum.

Current Consumption  :DC: 38 mA maximum.

Electrical Connections : Screw terminal block.

Mounting Orientation : Diaphragm in vertical position. Consult factory for other position orientations.

  • Easy to read gage permits viewing from far away
  • Patented design provides quick response to pressure changes means no delay in signaling and alerting to critical situations
  • Durable and rugged housing and high-quality components combined provides long-service life and minimized down-time
  • Optional stainless steel bezel is the same installation diameter as Magnehelic® gage and simplifies field upgrade to 605 indicating transmitter

Product Literature


Catalog Pages

Product Data Sheet


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