Dwyer USA Magnehelic Gauges 0 To 4.0 Inch WC

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Dwyer USA Magnehelic Gauges 0 To 4.0 Inch WC

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Dwyer USA Magnehelic Gauges 0 To 4.0 Inch WC Specification

Outer Size
Standard 4 inch diameter

Bourdon Tube
Not Applicable (Diaphragm based)

Seal Material
Silicone rubber

Thread
1/8 NPT

Sensor Type
Diaphragm type, Mechanical

Grade
Industrial Grade

Display
Analog, Dial Gauge

Material
Case: Die cast aluminum, Window: Clear acrylic

Dial Material
White aluminum with black markings

Pointer Material
Red tipped, precision balanced aluminum

Processing Type
Precision molded housing, leak-checked

Diameter
4 inch (101.6 mm)

Glass Size
4 inch Clear Acrylic

Mount Type
Surface or Panel Mounting

Scale Range
0 to 4.0 Inches WC (Water Column)

Accuracy
2% of Full Scale

Finishing
Corrosion-resistant, black anodized finish

Measure Pressure Of
Steam, Oil, Gas

Accessories
Two 1/8 NPT plugs, mounting adapters, screws and instruction sheet

Resolution
0.1 Inch WC

Overpressure Protection
To 15 psi without damage

Ingress Protection
IP52 (resistant to dust, limited ingress)

Model Number
2004 (0-4.0" WC)

Gasket Material
Neoprene

Operating Temperature
-7C to +60C (20F to 140F)

Application
HVAC, filter monitoring, air flow measurement, clean rooms, laboratories

Maximum Pressure
15 psi (1.03 bar)

Connection Location
Back or Bottom (unthreaded top, threaded bottom)

Weight
Approx. 570 grams

Dwyer USA Magnehelic Gauges 0 To 4.0 Inch WC Trade Information

Payment Terms
Cash on Delivery (COD), Cash Advance (CA), Cash Against Delivery (CAD), Cash in Advance (CID)

Main Export Market(s)
Asia

Main Domestic Market
Himachal Pradesh, Nagaland, Haryana, South India, East India, West India, Andaman and Nicobar Islands, Assam, Arunachal Pradesh, Bihar, Chandigarh, Goa, Jammu and Kashmir, Jharkhand, Karnataka, Mizoram, Meghalaya, Manipur, Punjab, Pondicherry, Rajasthan, Sikkim, Tamil Nadu, Telangana, Tripura, West Bengal, Uttarakhand, Daman and Diu, Dadra and Nagar Haveli, Lakshadweep, Uttar Pradesh, Maharashtra, Delhi, Gujarat, Madhya Pradesh, North India, Andhra Pradesh, Kerala, Central India, Odisha, Chhattisgarh, All India

About Dwyer USA Magnehelic Gauges 0 To 4.0 Inch WC

Dwyer USA Magnehelic Gauges 0 To 4.0 Inch WC

Model	Description
2004	Differential pressure gage, range 0-4.0" w.c., minor divisions .10.

The industry standard in indicating low air or gas pressures of positive, negative, or differential pressures.

Large, easy-to-read 4" (102 mm) dial.

No manometer fluid to evaporate, freeze, or cause toxic or leveling problems.

INCLUDES

Two 1/8" NPT plugs, two 1/8" rubber tubing adapters, and three mounting adapters with screws

MORE ABOUT THIS ITEM

The Magnahelic guage 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. The gauge's motion is damped with high-viscosity silicone fluid. The zero adjustment screw is conveniently located in the plastic cover, and is accessible without removing the cover. O-ring seal provides pressure tightness. Rugged design resists shock, vibration, and overpressure.

The helix is precision-made from an alloy of high magnetic permeability. Mounted in jeweled bearings, it turns freely, following the maganetic field to move the pointer across the scale. The samarium cobalt magnet is mounted at one end of the range spring and rotates the helix without mechanical linkages.

Specifications & Description

Accuracy	±3% full-scale
Dial Size (in)	4
Dial Size (mm)	102
Min Pressure (in WC)	0
Max Pressure (in WC)	0.5
Min Temperature (° F)	20
Max Temperature (° F)	140
Min Temperature (° C)	7
Max Temperature (° C)	60
Liquid Fill	Silicone
Case	Aluminum
Lens Material	Polycarbonate
Process Connection	1/8" NPT(F)
Unit Of Measurement	" WC
Display	analog dial
Media Compatibility	Air and noncombustible, compatible gases
Description	Magnehelic Differential Pressure Gauge, 2004: 0-4.0" w.c

Purpose-Built for Industrial Applications

This Magnehelic Gauge is specifically engineered for diverse environments such as HVAC installations, laboratories, clean rooms, and filter monitoring. It is capable of measuring low differential pressures of steam, oil, and gas while reliably operating in temperatures ranging from -7C to +60C (20F to 140F). Its robust construction ensures high performance under demanding conditions.

Trusted Mechanical Performance

Using a diaphragm-based sensor, the Magnehelic gauge provides mechanical, analog readouts without electronics, ensuring low maintenance and long-term durability. Its resolution of 0.1 inch WC and an accuracy of 2% of full scale allow for nuanced adjustments and precise measurements in critical monitoring systems.

Flexible Installation and Maintenance

Designed for both surface and panel mounting, the gauge features standard 1/8 NPT threaded bottom connections for convenient plumbing. Included accessories-mounting adapters, screws, plugs, and an instruction sheet-simplify installation and servicing. The IP52 ingress protection and corrosion-resistant black anodized finish contribute to a long operational life.

FAQ's of Dwyer USA Magnehelic Gauges 0 To 4.0 Inch WC:

Q: How is the Dwyer Magnehelic Gauge Model 2004 typically used in HVAC and laboratory settings?

A: The gauge is most often installed to monitor air flow, filter status, and room pressurization within HVAC systems, clean rooms, and laboratories. Its clear analog display allows users to detect small pressure changes quickly, making it ideal for performance monitoring and maintenance.

Q: What process is involved in installing this gauge?

A: Installation is straightforward: mount the gauge on a surface or panel, connect your pressure lines to the 1/8 NPT threaded bottom ports using the provided adapters and gaskets, and follow the included instruction sheet for secure fitting. This ensures proper operation and prevents leaks.

Q: When should I use this Magnehelic Gauge instead of a digital version?

A: Choose this mechanical gauge when you require a reliable, maintenance-free instrument that does not have electronic components. It's best suited for continuous monitoring where electricity or batteries are impractical or when a direct visual analog readout is preferred.

Q: Where can the gauge be mounted for optimal performance?

A: The Model 2004 can be surface- or panel-mounted, depending on your system layout. The back or bottom pressure connection locations, along with the supplied mounting hardware, offer flexibility for integration into cabinets, control panels, or equipment housings.

Q: What benefits does the IP52 rating provide for this gauge?

A: The IP52 rating ensures the gauge is protected against dust ingress and limited dripping water, making it reliable for most indoor applications, especially in industrial and laboratory environments where conditions can vary but full waterproofing is not necessary.

Q: How does the diaphragm sensor work, and what advantage does it offer?

A: The diaphragm-based sensor flexes in response to differential pressure changes, directly moving the precision-balanced pointer for fast and accurate analog readings. This simple design increases reliability, sensitivity, and reduces the potential for mechanical failure.

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