Select this Magnehelic gage for high accuracy - guaranteed within 2% of full scale. We have 81 models available to suit your needs preciscely. Using simple, frictionless Magnehelic 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 Magnahelic 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 ration controls and automatic valves, and monitors blood and respiratory pressures in medical care equipment.

Mounting
A single case size is used for most models of Magnehelic gages. They can be flush or surface mounted with standard hardware supplied. With the optional A-610 Pipe Mountint Kit they may be conveniently installed on horizontal or verticle 1-¼" - 2" pipe. Although calibrated for vertical position, many ranges above 1" may be used at any angle by simply re-zeroing. However, for maximum accuracy, they must be calibrated in the same position in which they are used. These characteristics make Magnehelic gauges ideal for both stationary and portable applications. A 4-9/16" hole is required for flush panel mounting. Complete mounting and connection fittings plus instructions are furnished with each instrument.

Indicate Positve, Negative
or Differential
Accurate within 2%

Large easy-to-read 4" dial
81 Models Available!

Flush, Surface, or Pipe Mounted

	Vent Valves In applications where pressure is continuous and the magnehelic gage is connected by metal or plastic tubing which cannot be easily removed, we suggest using A-310A vent valves to connect the guage. Pressure can then be removed to check or re-zero the gauge.
	High and Medium Pressure Models Installation is similar to standard gages except that a 4-13/16" hole is needed for flush mounting. The medium pressure construction is rated for internal pressures up to 35 psig and the high pressure up to 80 psig. Available for all models. Because of larger case, the medium pressure and high pressure models will not fit in a portable case size. Installation of the A-321 safety relief valve on standard Magnehelic gauges often provides adequate protection against infrequent overpressure.

Quality Design and Construction Features

Housing
Die cast aluminum case and bezel, with acrylic cover. Exterior finish is coated gray to withstand 168 hour salt spray corrosion test

Accuracy
±2% of full scale (±3% on - 0, -100PA, -125PS, 10MM and ±4% on -00, -60PA, -6MM ranges), throughout range at 70^oF (21.1^oC)

Standard Accessories
Two 1/8" NPT plugs for duplicate pressure taps
Two 1/8" pipe thread to rubber tubing adapters
Three flush mounting adapters with screws
(Mounting and snap ring retainer substituted for 3 adapters in MP & HP gage accessories)

*Low temperature models available as special option

OPTIONS AND ACCESSORIES
	Transparent Overlays Furnished in red, green or yellow to highlight and emphasize critical pressures Adjustable Signal Flag Integral with plastic gauge cover. Available for most models except those with medium or high pressure construction. Can be ordered with gauge or separate.
	LED Setpoint Indicator Bright red LED on right of scale shows when setpoint is reached. Field adjustable from gauge face, unit operates on 12-24 VDC. Requires MP or HP style cover and bezel.
	Portable Units Combine carrying case with any Magnehelic gage of standard range, except high pressure connection. Includes 9 ft. (2.7 m) of 3/16" I.D. rubber tubing, standhang bracket and terminal tube with holder. Portable Kit.
	Air Filter Gage Accessory Package Adapts any standard Magnehelic for use as an air filter gauge. Includes aluminum surface mounting bracket with screws, two 5 ft. (1.5 m) lengths of ¼" aluminum tubing two static pressure tips and two molded plastic vent valves, integral compression fittings on both tips and valves. Air Filter Kit

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