Dwyer Series AT22000 Magnehelic® Differential Pressure Gage

Part Number: Series AT22000 Category:

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The popular Series AT22000 Magnehelic® Differential Pressure Gage is now available in a flame-proof enclosure with the new ATEX/IECEx approved AT22000 Series. This gage can indicate positive, negative or differential pressures and is accurate within 2%. 

Product Applications

  • Fan and blower pressures
  • Filter resistance
  • Air velocity
  • Furnace draft
  • Liquid levels with bubbler systems
  • Pressure in fluid amplifier or fluidic systems

Service : Air and non-combustible, compatible gases.

Wetted Materials : Consult factory.

Magnehelic® Housing : Die cast aluminum case & bezel with acrylic cover; Exterior finish is coated gray to withstand 168 hour salt spray corrosion test.

Accuracy : ±2% of FS (±3% on -0, -100PA, -125PA, -10MM and ±4% on -00, -60PA, -6MM ranges), throughout range at 70°F (21.1°C).

Pressure Limits : -20 in Hg to 15 psig (-0.677 bar to 1.034 bar); MP option; 35 psig (2.41 bar), HP option; 80 psig (5.52 bar).

Overpressure : Relief plug opens at approximately 25 psig (1.72 bar), standard gages only. See overpressure protection note on Magnehelic® Gage catalog page.

Temperature Limits : 20 to 140°F (-6.67 to 60°C); Low temperature option: -20°F (-28.8°C); (Note: Product temperature limits are less than case limits).

Mounting Orientation : Diaphragm in vertical position.

Enclosure Rating : IP66. IP65 with option OPV, overpressure relief valve.

Housing material : Aluminum.

Finishing : Texture epoxy coat RAL7038.

Pressure Connections : 1/8″ NPT female brass (SS optional). In presence of acetylene it is necessary to use SS.

Weight : 8.6 lb (3.9 kg).

ATEX Certificate : BVI 14ATEX0072.

Agency Approvals : ATEX Compliant CE 1370 Ex II 2G Ex d IIC T6 Gb / II 2D Ex tb IIIC T85°C Db, -60°C=Tamb=+60°C IECEx Compliant: Ex d IIC T6 Gb / Ex tb IIIC T85°C Db

  • ATEX housing provides all the capabilities and value of the Magnehelic® in a flame & explosion proof enclosure
  • Quick response to pressure changes means no delay in assessing critical situations
  • Durable and rugged housing and high-quality components combined provides long-service life and minimized down-time
  • High impact strength and high temperature rated for applications where hazardous environments exist

Product Literature


Catalog Pages

Product Data Sheet


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