Overview
The Dwyer 2100 Magnehelic pressure gauge is part of Dwyer’s Series 2000 family of differential pressure gauges designed for accurate, reliable low-pressure measurement. With a 0–100 inches of water column (INH2O) range, this gauge measures positive, negative (vacuum), or differential pressures in HVAC systems, laboratory clean rooms, industrial process control, and pneumatic applications. The frictionless Magnehelic movement eliminates the accuracy drift and maintenance issues inherent in fluid-filled manometers.
Key Features
- Frictionless Magnehelic movement – Resists shock, vibration and over-pressures
- High accuracy – ±2% accuracy across the full 0–100 INH2O range
- No manometer fluid – No fluid to evaporate, freeze or cause toxic or leveling problems
- Quick response – Rapid indication of pressure changes for real-time system monitoring
- Easy-to-read dial – Large, easy-to-read 4″ (102 mm) dial with clearly marked scale
- Durable construction – Die cast aluminum body suitable for industrial and outdoor environments
Technical Specifications
- Pressure range: 0–100 inches of water column (INH2O)
- Accuracy: ±2% of full scale
- Process connection: 1/8″ NPT
- Body material: Die cast aluminum
- Dial face: 4″ (102 mm) diameter
- Operating temperature: 20–140°F
- Motion damping: High-viscosity silicone fluid
- Overpressure protection: Relief plug set at approximately 25 psig
- Mounting: Flush or surface mount with standard hardware included
Typical Applications
The Magnehelic gauge 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. It also checks gas-air ratio controls and automatic valves, and monitors blood and respiratory pressures in medical care equipment. Additional applications include HVAC filter clogging indicators, clean room differential pressure monitoring, and laboratory gas pressure measurement.
Compatibility & Replacements
Compatible With
- HVAC and air handling systems
- Clean room monitoring and environmental chambers
- Pneumatic control systems
- Industrial process monitoring
- Furnace and combustion air systems
- Laboratory gas distribution networks
Replaces / Drop-In Replacement For
The Dwyer 2100 is a standard Series 2000 Magnehelic gauge. Verify compatibility with your system integrator before ordering for any legacy equipment replacements.
Works With
- Dwyer accessory mounting brackets (A-300 flush mount, A-368 surface mount, pipe mounting kits)
- Standard 1/8″ NPT tubing and fittings (plastic or aluminum recommended)
- Dwyer A-310A vent valves for secure tubing connection
- Non-corrosive dry gases and clean compressed air media
