Dwyer 2005D Magnehelic Differential Pressure Gauge

About Dwyer 2005D Magnehelic Differential Pressure Gauge

Select the Magnehelic gage for high accuracy--guaranteed within 2% of full scale--and for the wide choice of 81 models available to suit your needs precisely. Using Dwyer's simple, frictionless Magnehelic gage movement, it quickly indicates low air or non-corrosive gas pressures--either positive, negative (vacuum) or differential. The design resists shock, vibration and over-pressures. No manometer fluid to evaporate, freeze or cause toxic or leveling problems. It's inexpensive, too. The Magnehelic gage 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.

Product Highlights

Blowout plug is comprised of a rubber plug on the rear which functions as a relief valve by unseating and venting the gage interior when over pressure reaches approximately 25 PSIg (1.7 bar). To provide a free path for pressure relief, there are four spacer pads which maintain 0.023" clearance when gage is surface mounted. Do not obstruct the gap created by these pads. The blowout plug is not used on models above 180" of water pressure, medium or high pressure models, or on gages which require an elastomer other than silicone for the diaphragm. The blowout plug should not be used as a system overpressure control. High supply pressures may still cause the gage to fail due to over pressurization, resulting in property damage or serious injury. Good engineering practices should be utilized to prevent your system from exceeding the ratings or any component.

O-ring seal for cover assures pressure integrity of case. Samarium Cobalt magnet mounted at one end of range spring rotates helix without mechanical linkages.

Versatile Performance for Air and Gas Monitoring

The Dwyer 2005D Magnehelic Gauge is designed for use across a range of industries, including HVAC, pharmaceuticals, and clean room monitoring. Its mechanical diaphragm sensor enables accurate measurement of differential air pressure within a scale range of 0-0.5 inches w.c. This industrial-grade instrument ensures reliable performance and meets RoHS compliance standards, ensuring safety and sustainability.


Robust Build and Flexible Installation

Constructed from die-cast aluminum with a textured black finish, the 2005D is engineered to endure demanding environments. Its IP54 rating provides dust and splash resistance, while dual connection locations (side and back) allow seamless integration into surface or flush mounting setups. The external zero adjustment screw offers easy calibration for precise pressure measurement.