Dwyer USA Model 2250 Magnehelic Gage Range 0-250 Inch WC

About Dwyer USA Model 2250 Magnehelic Gage Range 0-250 Inch WC

Dwyer USA Model 2250 Magnehelic Gage Range 0-250 Inch WC

Dwyer 2250 Differential pressure gage, range 0-250" w.c. (inches of water), minor divisions 5.

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 and Reliability for Pressure Measurement

The Model 2250 Magnehelic Gage delivers high-accuracy measurements for differential, positive, and negative pressure applications involving air and non-corrosive gases. Engineered for industrial settings, its diaphragm-actuated mechanism ensures reliable performance even under rigorous working conditions. The external zero adjustment screw allows calibration adjustments without dismantling, adding to its convenience and reliability.


Versatile Installation and Rugged Construction

Designed for flexible mounting, the Magnehelic gage accommodates both surface and flush installations, suiting diverse industrial setups. Its die-cast aluminum body, paired with a clear acrylic front, assures durability and clear visibility of readings. Essential accessories accompany the gage, streamlining the installation process and supporting long-term operation within harsh environments.