 Select the Dwyer Magnehelic gage for high accuracy guaranteed within
2% of full scale and for the wide choice of 81 ranges available to suit
your needs precisely. Using Dwyer's simple, frictionless Magnehelic movement,
it quickly indicates low air or non-corrosive gas pressures either positive,
negative (vacuum) or differential. The design resists shock, vibration
and over-pressures. No manometer fluid to evaporate, freeze or cause
toxic or leveling problems. It's inexpensive, too.
Widely used 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.
Mounting. A single case size is used for most ranges of
Magnehelic gages. They can be flush or surface mounted with standard
hardware supplied. With the optional A-610 Pipe Mounting Kit
they may be conveniently installed on horizontal or vertical
1 1/4" - 2" pipe. Although calibrated for vertical
position, many ranges above 1 inch may be used at any angle by
simply re-zeroing. However, for maximum accuracy, they must be
calibrated in the same position in which they are used. These
characteristics make Magnehelic gages ideal for both stationary
and portable applications. A 4 9/16" hole is required for
flush panel mounting. Complete mounting and connection fittings
plus instructions are furnished with each instrument.
Vent valves
In applications where pressure is continuous and the Magnehelic gage
is connected by metal or plastic tubing which cannot be easily removed,
we suggest using Dwyer A-310A vent valves to connect gage. Pressure
can then be removed to check or re-zero the gage.
 Related Product: The Venturi Flowmeter with Magnehelic® Gage is fabricated from aluminum and has a gradual Venturi profile to reduce pressure losses through the meter. Flexible connections enable the meter to be used in vertical or horizontal applications. The Magnehelic® gage provides a large, clear and accurate display of your differential pressure reading. Each meter is calibrated at standard atmospheric conditions. The dual scale reads in SCFM and in w.c. The meter is supplied with easy to read reference charts for various flow conditions. It is available in line sizes from 1" to 4" and can handle vacuum and pressure applications. Model VFLO Magnehlic Flowmeter
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