Dwyer

Dwyer Instruments, founded in 1931, designs pressure, flow, and level instrumentation, best known for the Magnehelic differential pressure gauge. The frictionless Magnehelic movement indicates positive, negative, or differential air and gas pressure without a manometer fluid to evaporate or freeze, and the gauge family spans 81 models with accuracy guaranteed within 2% of full scale, or down to ±1% on high-accuracy versions. WestCalibration is an authorized Dwyer dealer.

Why Choose Dwyer

• Magnehelic gauges use a frictionless magnetic movement with no manometer fluid to evaporate, freeze, or cause leveling problems
• 81 Magnehelic models and 27 options cover fan/blower pressure, filter resistance, air velocity, furnace draft, and liquid level via bubbler systems
• High-Accuracy (-HA) option improves standard Magnehelic performance to ±1% of full scale
• IP67-rated enclosures on current Series 2000 gauges withstand a 168-hour salt spray corrosion test for demanding industrial environments

Why Buy Dwyer from WestCalibration

As a stocking distributor rather than a dropshipper, we can move orders in this line quickly. Their line is available in our pressure sensors category.

Frequently Asked Questions

What does “frictionless” mean on a Magnehelic gauge? The internal movement uses a magnetic link rather than mechanical linkages, so there’s no friction-related wear or hysteresis affecting the reading over time.

Can a Magnehelic gauge measure liquid level? Yes, when paired with a bubbler system, a Magnehelic gauge can indicate liquid level by measuring the back-pressure needed to bubble air through a submerged tube.