Dwyer USA Model 2120 Magnehelic Gage Range 0-120 Inch WC

About Dwyer USA Model 2120 Magnehelic Gage Range 0-120 Inch WC

Dwyer USA Model 2120 Magnehelic Gage Range 0-120 Inch WC

Dwyer 2120 Differential Pressure Gage, range 0-120" w.c. (inches of water), minor divisions 2.0.

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.

Note:  May be used with Hydrogen. Order a Buna-N diaphragm. Pressures must be less than 35 psi.

Features

Bezel provides flange for flush mounting in panel.

Clear plastic face is highly resistant to breakage. Provides undistorted viewing of pointer and scale.

Precision litho-printed scale is accurate and easy to read.

Red tipped pointer of heat treated aluminum tubing is easy to see. It is rigidly mounted on the helix shaft.

Pointer stops of molded rubber prevent pointer over-travel without damage.

"Wishbone" assembly provides mounting for helix, helix bearings and pointer shaft.

Jeweled bearings are shock-resistant mounted; provide virtually friction-free motion for helix. Motion damped with high viscosity silicone fluid.

Zero adjustment screw is conveniently located in the plastic cover, and is accessible without removing the cover. O-ring seal provides pressure tightness.

Helix is precision made from an alloy of high magnetic permeability. Mounted in jeweled bearings, it turns freely, following the magnetic field to move the pointer across the scale.

Samarium Cobalt magnet mounted at one end of range spring rotates helix without mechanical linkages.

Calibrated range spring is flat spring steel. Small amplitude of motion assures consistency and long life. It reacts to pressure on diaphragm. Live length adjustable for calibration.

Silicone rubber diaphragm with integrally molded O-ring is supported by front and rear plates. It is locked and sealed in position with a sealing plate and retaining ring. Diaphragm motion is restricted to prevent damage due to overpressures.

Die cast aluminum case is precision made and iridite-dipped to withstand 168 hour salt spray corrosion test. Exterior finished in baked dark gray hammerloid. One case size is used for all standard pressure options, and for both surface and flush mounting.

Blowout plug of silicone rubber protects against overpressure on 15 psig rated models. Opens at approximately 25 psig.

O-ring seal for cover assures pressure integrity of case.

Precision Measurement for Industrial Airtightness

Engineered for reliable performance, the Model 2120 Magnehelic Gage measures differential pressure up to 120 inches of water column, essential for HVAC balancing, air velocity checks, and filter resistance assessments. Its mechanical diaphragm sensor is highly sensitive to pressure fluctuations, ensuring both accuracy and immediate feedback across applications.


Durable Design Ensures Longevity

Manufactured with a die-cast aluminum body and anodized finish, the gage withstands harsh industrial conditions. The dust and splash-resistant cover protects the internal mechanisms, while the silicone rubber seal guarantees lasting operation, even in environments with airborne particulates or moisture.


Effortless Installation and Use

The panel-mounted design, with side housing ports and included mounting accessories, simplifies setup. The analog display provides clear, direct readings with 1 Inch WC resolution, and the external zero adjustment screw allows quick calibration without disassembly, streamlining maintenance routines in any facility.