Overview
The Dwyer Magnehelic 2215 is a robust, analog differential pressure gauge designed to measure low pressures in air and non-corrosive gas systems. Part of Dwyer’s industry-leading Series 2000 Magnehelic line, this 4-inch dial gauge combines reliable mechanical measurement with durable construction, requiring no electrical power or calibration drift issues.
Key Features
- Frictionless magnetic measurement — Samarium Cobalt magnet mounted on range spring rotates helix without mechanical linkages, eliminating friction and wear
- IP67-sealed aluminum housing — Die-cast aluminum body with O-ring seal withstands dusty, wet, and harsh environments
- ±2% accuracy — Guaranteed within 2% of full scale throughout operating range
- 4-inch dial with precision scale — Easy-to-read litho-printed scale with red-tipped aluminum pointer and shock-resistant jeweled bearings
- Built-in overpressure protection — Relief plug opens at 25 psig; designed to handle pressures from -20 inches Hg to 15 psig
- No fluids or maintenance required — Motion damped with silicone fluid; zero adjustment accessible without cover removal
Technical Specifications
The Dwyer 2215 delivers reliable performance across demanding industrial and HVAC applications:
- Pressure Range: 0–15 psi differential
- Rated Total Pressure: -20 inches Hg to 35 psig maximum
- Accuracy: ±2% of full scale
- Overpressure Relief: 25 psig
- Dial Face: 4 inches with minor divisions of 0.5 psi
- Process Connections: 1/8-inch NPT female (high and low pressure taps, back mount)
- Operating Temperature Range: 20–140°F (-6.7–60°C)
- Housing: Die-cast aluminum with IP67 enclosure rating
- Media Compatibility: Clean dry air, inert gases, non-corrosive dry gases
- Series: 2000 (Magnehelic)
Typical Applications
The Dwyer Magnehelic 2215 is the industry standard for:
- HVAC fan and blower discharge pressures
- Air filter resistance and pressure drop monitoring
- Furnace draft and air velocity measurement
- Pressure drop across orifice plates in industrial systems
- Liquid level sensing with bubbler systems
- Clean room and laboratory pressure monitoring
- Medical gas and respiratory equipment pressures
Compatibility & Replacements
Compatible With
- HVAC systems and air handling units
- Industrial pneumatic systems
- Furnace and duct pressure monitoring
- Filter banks and coil pressure sensing
- Medical and laboratory gas delivery systems
- Fluidic and pneumatic control circuits
Replaces / Drop-In Replacement For
- Earlier Dwyer 2000 series gauges with identical specifications
- Other 0-15 psi differential gauges with 1/8-inch NPT connections
Works With
- Dwyer mounting brackets (Model A-610 for 1.25–2-inch pipe)
- Standard 1/8-inch NPT pressure tubing and fittings
- Dwyer air filter gauge adapters and static pressure kits
- HVAC control systems and diagnostic equipment
