Dwyer

USAMeasurement & Detection

Dwyer Instruments (USA; est. 1931) manufactures pressure, flow, level, and temperature measurement instruments for industrial HVAC, process control, and combustion applications. The Dwyer catalog is available — the Magnehelic differential-pressure gauges (Series 2000 and 2300), the Mark II inclined-vertical manometers, Photohelic pressure switch/gauges, air-velocity transmitters, and the Capsuhelic and Digihelic digital differential-pressure gauge ranges.

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General-purpose clip-on dial thermometer for direct attachment to vat or pan rims. Measures temperature in Fahrenheit from 0°F to 140°F with +/- 2% accuracy. Features an 8-inch stem length for immersion in liquids. Suitable for monitoring temperatures in food processing, commercial kitchens, and industrial liquid-holding applications.

Dwyer

Dwyer Clip-On Dial Thermometer

BrandDwyer

CategoryGeneral Purpose Vat & Pan Clip-On Dial Thermometers

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This inline paddle flow switch is designed for liquid flow detection in hazardous locations rated Class II, Div 1 and 2, Groups E, F, G. It features a 2 in NPT connection, fits 3/8 in pipe size, and has a stainless steel paddle. AC contact rating is 5 A @ 125/250V; DC contact rating is 37 A (inductive) @ 30V on CSA, ATEX, and IECEx models. Suitable for use in environments with combustible dust, such as industrial processes and grain-handling facilities.

Dwyer

Dwyer V6EPS-S-D-6-S Inline Hazardous-Location Paddle Flow Switch

BrandDwyer

CategoryInline Hazardous-Location Switches for Liquids

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Dwyer

Dwyer V10 Insertion-Style Paddle Flow Switch for Liquids

BrandDwyer

CategoryInsertion-Style Switches for Liquids

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Dwyer

Dwyer AVLV-2DA1 Air Velocity Transmitter

BrandDwyer

CategoryAir Velocity Transmitters

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Variable area flowmeter for panel-mount installation in water applications. Vertical orientation, Buna-N O-rings, FNPT connections, and flow rate adjustment knob. Accuracy ±2%, rated for water up to 130°F, measures flow in gallons.

Dwyer

Dwyer RMC-144 Variable Area Panel-Mount Flowmeter for Water

BrandDwyer

CategoryPanel-Mount Flowmeters for Water

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Inline paddle flow switch for detecting liquid flow or no-flow conditions in hazardous locations. Brass body with 1/2 in NPT connection, for 3/8 in pipe size. Rated Class II, Div 1 and 2, Groups E, F, G. AC contact rating 5 A @ 125/250V; DC contact rating 5 A resistive @ 30V (CSA, ATEX, IECEx models).

Dwyer

Dwyer V6EPB-B-D-1-B Inline Hazardous-Location Paddle Flow Switch

BrandDwyer

CategoryInline Hazardous-Location Switches for Liquids

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Dwyer

Dwyer DPMA-401 DC Current Digital Panel Meter

BrandDwyer

CategoryDC Current Digital Panel Meters

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Thread-mount transmitting dial thermometer with a 6-inch stem and male connection. Provides local dial indication and a process output signal for remote monitoring. Suitable for industrial temperature measurement in pipelines, storage tanks, and HVAC systems.

Dwyer

Dwyer BTO56071 Thread-Mount Transmitting Dial Thermometer

BrandDwyer

CategoryThread-Mount Transmitting Dial Thermometers

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Dwyer

Dwyer A-376 Replacement Ball Floats, 3-Pack

BrandDwyer

CategoryAir Velocity Meter Accessories

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This air velocity transmitter measures air flow from 250 fpm to 15,000 fpm with an accuracy of ±3% from 32°F to 122�°F. It operates in temperatures from 32°F to 140°F and provides a 4 mA to 20 mA output signal. Typical applications include HVAC duct monitoring, fume hood face velocity measurement, and clean room air flow verification. Calibration certificate not included.

Dwyer

Dwyer 641-24 Air Velocity Transmitter, 250-15000 fpm, 4-20 mA Output

BrandDwyer

CategoryAir Velocity Transmitters

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About Dwyer

The Magnehelic gauge is the industry-standard instrument for measuring combustion air-filter differential pressure, fan-discharge static pressure, and clean-room pressurisation on industrial sites globally. Maintenance engineers specify the Magnehelic by part number — the Series 2000 (0–0.5" w.c. through 0–100" w.c.) covers over 80% of combustion-air and HVAC filter-monitoring installations. The most-requested Magnehelic ranges plus matching static-pressure probes and mounting accessories are available for prompt supply.

Beyond the Magnehelic, Dwyer's Capsuhelic (Series 4000) and Digihelic (Series DH3) digital gauges serve higher-accuracy and remote-monitoring requirements — the Digihelic provides 4–20 mA output for BMS integration. The Photohelic (Series 3000) combines gauge and switch in a single instrument, commonly used for fan-failure and filter-blockage alarms on commercial air-handling units. The highest-turnover Dwyer SKUs are in stock; less-common ranges and custom-scale variants have a factory lead time on request.

Common Applications

Combustion air-filter monitoring — Magnehelic Series 2000 on burner air-intake filter banks
Clean-room and pharmaceutical pressurisation — Magnehelic / Capsuhelic differential-pressure gauges
HVAC fan-discharge static pressure — Mark II inclined-vertical manometers on AHU test points
Filter-blockage alarms — Photohelic Series 3000 combined gauge/switch on air-handling units
BMS-integrated pressure monitoring — Digihelic DH3 with 4–20 mA output for building management

Product Lines

Magnehelic Series 2000 differential-pressure gaugesMark II inclined-vertical manometersPhotohelic Series 3000 switch/gaugesCapsuhelic Series 4000 precision gaugesDigihelic DH3 digital gaugesAir-velocity transmitters

Origin: Manufactured in USA

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Guides & Resources

Dwyer Spare Parts & Components: Complete Buyer's Guide

Frequently asked questions

Common questions about Dwyer from 3G Electric.

Are Dwyer products available?

Yes. We carry the Dwyer Instruments portfolio — Magnehelic gauges, Mark II manometers, Photohelic switch/gauges, Capsuhelic and Digihelic digital gauges, and air-velocity transmitters.

Which Dwyer Magnehelic gauge ranges are available?

The most-requested Series 2000 ranges (0–0.5", 0–1", 0–2", 0–5", 0–10", 0–25" w.c.) are typically available on shorter lead times. Extended-range, dual-scale (Pa/w.c.), and high-pressure Magnehelic variants have a factory lead time on request.

What is the difference between a Dwyer Magnehelic and a Capsuhelic?

The Magnehelic (Series 2000) is a mechanical diaphragm gauge with ±2% full-scale accuracy — the industry standard for visual monitoring. The Capsuhelic (Series 4000) uses a precision capsule element for ±1% accuracy and is suited for higher-precision applications. Both mount identically.

Can a Dwyer Photohelic replace a separate gauge and pressure switch?

Yes. The Photohelic Series 3000 combines a Magnehelic-type gauge with high and low set-point switches in a single instrument, eliminating the need for separate gauge and switch installations on fan-failure and filter-blockage alarm circuits.

Does Dwyer offer gauges with electronic output for BMS integration?

Yes. The Digihelic Series DH3 provides 4–20 mA analog output and dual set-point relay contacts for building-management integration. Dwyer also offers standalone differential-pressure transmitters (Series 616, Series 629) for process-control loops.

Does 3G Electric supply Dwyer products?

Yes — 3G Electric (S) Pte. Ltd. supplies Dwyer products. We stock the Dwyer catalog and supply genuine factory-original products with full manufacturer warranty and technical support.