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Magnehelic Differential Pressure Gauges

Series 2000

The Magnehelic® gauge 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. It also checks gas-air ratio controls and automatic valves, and monitors blood and respiratory pressures in medical care equipment.

Select the Magnehelic® gauge for high accuracy, guaranteed within 2% of full scale. Designed for air and non-corrosive gases, 81 models are available to suit any requirement. Using Dwyer's simple, frictionless Magnehelic® gauge movement, this range of products quickly indicates low air or non-corrosive gas pressures - positive, negative (vacuum) or differential. These gauges resist shock, vibration and over-pressures and contain no manometer fluid to evaporate, freeze or cause toxic or leveling problems. They are very budget friendly as well!

Design features include a breakage resistant glass, easy-to-see red tipped pointer, near frictionless movement of internal mechanisms, a zero adjustment screw that can be accessed without removing the cover, resistance to overpressures, O-ring seal and die-cast iridite-dipped aluminium cases that have passed a 168 hour salt spray corrosion test.

  • Bezel with flange for flush mounting in panel
  • Breakage resistant clear plastic face
  • Precision litho-printed scale
  • Shock-resistant jeweled bearings
  • Easy access to zero-adjustment screw
  • Motion dampening with high viscosity silicone fluid
  • Corrosion resistant die-cast aluminium case


  • Pressure Measurement



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