Magnehelic Differential Gauge
Magnehelic Differential Gauge

Magnehelic gauges are commonly used for measuring the differential pressure across applications such as blower pressure, air velocity, differential room pressures, Heating, Ventilation and Air Conditioning (HVAC) Systems. The simple, frictionless gauge movement quickly indicates low air or non-corrosive gas pressures – either positive, negative (vacuum) or differential. The design resists shock, vibration and over-pressures.


  • Diameter: 120mm
  • Ranges: Wide selection from -3000 up to +8000 Pascals
  • Accuracy: ±2% to ±4% FSD (subject to range)
  • Connection: Side & Rear – 1/8″ NPT Pipe Fitting
  • Mounting: Panel Mount
  • Case Filling: N/A – Dry
  • Case Material: Alloy
  • Wetted Parts: Silicone Rubber Diaphragm
  • Window: Plastic with Zero Adjust


  • Custom Ranges/Dials
  • Customer Logo
  • Alternative Mounting Options:
  • Flush Mounted
  • Surface Mount
  • 2″ Pipe Mount
  • 3 Hole Front Flange
  • Flexible Tubing
  • Set Point Indicator
  • Over-Pressure

Calibration Notes

  • Traceable to National Standards

If you have any questions, please contact us on +44 (0) 117 965 4615 or visit our enquiry page and submit the form.

We can also customise our products to your specific needs.

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Leading industry standards

NQA ISO9001 Accredited and Achilles Affiliated

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  • NQA UKAS logo
  • BEMA logo
  • QAS International ISO 14001:2025 logo

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