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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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About Dwyer

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.

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

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.