Series

Magnehelic^® Differential Pressure Gages

2000

Indicate Positive, Negative or Differential, Accurate within 2%

Select the Dwyer^®  Magnehelic^® gage for high accuracy – guaranteed within 2%

of full scale – and for the wide choice of 81 models available to suit your needs

precisely. Using Dwyer’s simple, frictionless Magnehelic^® gage 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.

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. It also

checks gas-air ratio controls and automatic valves, and monitors blood and

respiratory pressures in medical care equipment.

SPECIFICATIONS

Service: Air and non-combustible, compatible gases. (Natural Gas option available.)

Wetted Materials: Consult factory.

Housing: Die cast aluminum case and bezel, with acrylic cover. Exterior finish is coated

gray to withstand 168 hour salt spray corrosion test.

Accuracy: +/-2% of full scale (+/-3% on -0, -100 Pa, -125 Pa, 10MM and +/-4% on

- 00, -60 Pa, -6MM ranges), throughout range at 70^๐F (21.1^๐C)

Pressure Limits: -20 Hg to 15 psig.t (-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.

Temperature Limits: 20 to 140^๐F (-6.67 to 60^๐C).

Size: 4” (101.6 mm) Diameter dial face.

Mounting Orientation: Diaphragm in vertical position. Consult factory for other position

orientations.

Process Connections: 1/8” female NPT duplicate high and low pressure taps – one pair

side and one pair back.

Weight: 1 lb 2 oz (510 g), MP & HP 2 lb 2 oz (963 g).

Standard Accessories: Two 1/8” NPT plugs for duplicate pressure taps, two 1/8” pipe thread

to rubber tubing adapter and three flush mounting adapters with screws. (Mounting and

snap ring retainer substituted for 3 adapters in MP & HP gage accessories.)