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Magnehelic Differential Pressure Gage

Series AT22000

The popular Magnehelic® Differential Pressure Gage is now available in a flame-proof ATEX enclosure with the new ATEX approved AT22000 Series. This gage can indicate positive, negative or differential pressures and is accurate within 2%. The Magnehelic® gage is the industry standard to measure fan and blower pressures, filter resistance, air velocity, furnace draft, pressure drop across orifice plates, liquid levels with bubbler systems and pressures in fluid amplifier or fluidic systems. Optional gage construction is available for use to either 35 psig (2.42 bar) or 80 psig (5.51 bar). Flame-proof ATEX enclosures are available in aluminum and include a glass window for viewing process pressures status on gage face. 

  • 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, -100 Pa, -125 Pa, -10 mm and ±4% on -00, -60 Pa, -6 mm 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); Case: -58 to 140°F (-50 to 60°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).

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