Tech Tip: How to Use a Dwyer Magnehelic Differential Pressure Gage


The Dwyer Magnehelic Differential Pressure gage has been an industry staple/standard for many years.

Available in 81 different models this simple frictionless gage movement quickly indicates low air or non-corrosive gas pressures.


These pressures can be either positive, negative (vacuum) or differential. The design resists shock, vibration, and over-pressures.


The Magnehelic is used to measure fan and blower pressures, filter resistance, air velosity, furnace draft, pressure drop accross orifice plates, liquid levels with bubbler systems, and pressures in fluid amplifier or fluidic systems.


Stromquist and Company is proud to be a authorized distributor of Dwyer products which include Mercoid, Love, W.E. Anderson, and Proximity Controls. When your needs point to Dwyer call us at 1-800-241-9471 and we will we happy to take care of those needs.




Over 35 years in the controls industry. Mr. Jones, Mr, Jones, Mr. Jones has a good thing going on... and lovin' it. Avid photographer, motorcyclist, and antique motorcycle restorer.

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  1. Jerry Forcier says

    This youTube video had nothing whatsoever to do with using your gages. I wasted my time listening to it. It would have been a fine video, if it had been called How to mount a Magnehelic Gage.

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