Magnehelic Gauge

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Magnehelic Gauge Specification

Seal Material
Neoprene

Sensor Type
Differential Pressure Sensor

Display
Analog

Thread
1/8 NPT Female

Grade
Industrial

Outer Size
110 mm Diameter

Material
Aluminum Case

Dial Material
Polycarbonate

Pointer Material
Aluminum

Processing Type
Die Cast

Diameter
110 mm

Glass Size
Full Front Face Diameter

Mount Type
Surface / Panel Mount

Scale Range
0-60 cm/h2o

Accuracy
2% of Full Scale

Finishing
Powder Coated

Measure Pressure Of
Low Air or Non-Corrosive Gas

Accessories
Mounting Screws, Instruction Manual

About Magnehelic Gauge

Magnehelic Gauge

Magnehelic gage for high accuracyguaranteed within 2% of full scaleand for the wide choice of 81 models available to suit your needs precisely. Using Dwyers simple, frictionless Magnehelic gage movement, it quickly indicates low air or non-corrosive gas pressureseither 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. Its 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.

Magnehelic Specifications

Service: Air and non-combustible, compatible gases. (Natural Gas option available.) Note:May be used with hydrogen. Order a Buna-N diaphragm. Pressures must be less than 35 psi.
Wetted Materials: Consult with us.
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 FS (3% on -0, -100PA, -125PA, -10MM and 4% on -00, -60PA, -6MM ranges), throughout range at 70F (21.1C).
Pressure Limits: -20 in Hg. to 15 psig. (-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. See Overpressure Protection note on Catalog page.
Temperature Limits: 20 to 140F.* (-6.67 to 60C).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 adapters and three flush mounting adapters with screws. (Mounting and snap ring retainer substituted for three adapters in MP & HP gage accessories.)
Agency Approval: RoHS. (Note: -SP models not RoHS approved.)
For applications with high cycle rate within gage total pressure rating, next higher rating is recommended. See Options Page.
Low temperature models available as special option.

Versatile Applications

Ideal for diverse settings, including HVAC systems, clean rooms, and filter or blower pressure monitoring, the Magnehelic Gauge excels in applications that require dependable low gas or air pressure measurement. Its industrial-grade construction and precise differential pressure sensing make it suitable for critical and general environments alike.

Reliable and Durable Design

Constructed with a die-cast aluminum body, clear acrylic cover, and powder-coated finish, this gauge ensures long-term durability and resistance to environmental stress. The IP52 classification offers moderate protection against dust and drips, increasing reliability in everyday industrial usage.

Effortless Installation and Operation

The Magnehelic Gauge is designed for either surface or panel mounting, and comes complete with all necessary screws and an instruction manual. The brass connectors (1/8 NPT female) and full-face dial ensure simple setup and straightforward reading under a variety of conditions.

FAQs of Magnehelic Gauge:

Q: How does the Magnehelic Gauge measure differential pressure?

A: The Magnehelic Gauge utilizes a differential pressure sensor to measure the difference in pressure between two points, most commonly in low air or non-corrosive gas applications. Its analog display translates this difference into a clear reading on the scale, ranging from 0 to 60 cm/h2o.

Q: What are the typical application areas for this model?

A: This gauge is extensively used in HVAC systems, clean rooms, filter monitoring, and fan or blower pressure management. Its suited for any setting where precise monitoring of low air or gas pressure is required, particularly in industrial-grade operations.

Q: When should this gauge be selected over other pressure measuring devices?

A: Choose the Magnehelic Gauge when you need accurate, visual, and rapid monitoring of low pressure differences, especially for air or non-corrosive gases. Its over-range protection and 2% accuracy make it a reliable tool in environments that demand robust performance.

Q: Where should the Magnehelic Gauge be installed?

A: Install the gauge on a flat panel or surface near the location where you wish to measure pressure differences, such as across filters or in ventilation ducts. Ensure the pressure ports are correctly connected with brass fittings for accurate results and to maintain IP52 protection.

Q: What benefits does the analog display offer for industrial users?

A: The analog display provides immediate, easy-to-read pressure values without the need for power or calibration delays common with digital instruments. It enables quick system checks and continuous monitoring, facilitating rapid response during maintenance or operational adjustments.

Q: How do I maintain optimal performance of the Magnehelic Gauge?

A: Keep the gauge free from dust and moisture, mount it securely, and periodically check the integrity of brass connectors and neoprene seals. Avoid exposing it to pressures exceeding the 172 kPa over-range limit to ensure longevity and reliable readings.

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