Series 2000 Magnehelic® Differential Pressure Gage

Indicate Positive, Negative or Differential, Accurate within 2%

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.

Note: May be used with Hydrogen. Order a Buna-N diaphragm. Pressures must be less than 35 psi.

Please see SERIES AT22000 for ATEX approved.

Product Applications

  • Filter Monitoring
  • Air Velocity with Dwyer Pitot Tube
  • Blower Vacuum Monitoring
  • Fan Pressure Indication
  • Duct, Room or Building Pressures
  • Clean Room Positive Pressure Indication

Models & Ordering

Filter By

Build Your Custom Part. Use our Product Configurator

Model Number Description Usually Ships Price Order
2000-0 Differential pressure gage, range 0-0.50" w.c., minor divisions .01, calibrated for vertical scale position. Same Day $63.50 Order
2000-00 Differential pressure gage, range 0-0.25" w.c., minor divisions .005, calibrated for vertical scale position. Same Day $73.00 Order
2000-00N Differential pressure gage, range .05-0-.2" w.c., minor divisions .005, calibrated for vertical scale position. Same Day $77.45 Order
2001 Differential pressure gage, range 0-1.0" w.c., minor divisions .02. Same Day $63.50 Order
2002 Differential pressure gage, range 0-2.0" w.c., minor divisions .05. Same Day $63.50 Order
2003 Differential pressure gage, range 0-3.0" w.c., minor divisions .10. Same Day $63.50 Order
2004 Differential pressure gage, range 0-4.0" w.c., minor divisions .10. Same Day $63.50 Order
2005 Differential pressure gage, range 0-5.0" w.c., minor divisions .10. Same Day $63.50 Order
2006 Differential pressure gage, range 0-6.0" w.c., minor divisions .20. Same Day $63.50 Order
2008 Differential pressure gage, range 0-8.0" w.c., minor divisions .20. Same Day $63.50 Order
2010 Differential pressure gage, range 0-10" w.c., minor divisions .20. Same Day $63.50 Order
2015 Differential pressure gage, range 0-15" w.c., minor divisions .50. Same Day $63.50 Order
2020 Differential pressure gage, range 0-20" w.c., minor divisions .50. Same Day $63.50 Order
2025 Differential pressure gage, range 0-25" w.c., minor divisions .50. Same Day $63.50 Order
2030 Differential pressure gage, range 0-30" w.c., minor divisions 1.0. Same Day $63.50 Order
2040 Differential pressure gage, range 0-40" w.c., minor divisions 1.0. Same Day $63.50 Order
2050 Differential pressure gage, range 0-50" w.c., minor divisions 1.0. Same Day $63.50 Order
2060 Differential pressure gage, range 0-60" w.c., minor divisions 2.0. Same Day $63.50 Order
2080 Differential pressure gage, range 0-80" w.c., minor divisions 2.0. Same Day $63.50 Order
2100 Differential pressure gage, range 0-100" w.c., minor divisions 2.0. Same Day $63.50 Order
2150 Differential pressure gage, range 0-150" w.c., minor divisions 5.0. Same Day $63.50 Order

Can't find what you need? Try our Product Configurator

Specifications

Service:
Air and non-combustible, compatible gases. (Natural Gas option available.)
Note:
May be used with hydrogen. Order a Buna-N diaphragm. Pressures must be less than 35 psi.
Wetted Materials:
Consult factory.
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 FS (±3% on -0, -100PA, -125PA, -10MM and ±4% on -00, -60PA, -6MM ranges), throughout range at 70°F (21.1°C).
Pressure Limits:
-20 in Hg. to 15 psig. (-0.677 bar to 1.034 bar); MP option; 35 psig (2.41 bar), HP option; 80 psig (5.52 bar).
Overpressure:
Relief plug opens at approximately 25 psig (1.72 bar), standard gages only. See Overpressure Protection note on Catalog page.
Temperature Limits:
20 to 140°F.* (-6.67 to 60°C).
Size:
4" (101.6 mm) diameter dial face.
Mounting Orientation:
Diaphragm in vertical position. Consult factory for other position orientations.
Process Connections:
1/8" female NPT duplicate high and low pressure taps - one pair side and one pair back.
Weight:
1 lb 2 oz (510 g); MP & HP 2 lb 2 oz (963 g).
Standard Accessories:
Two 1/8" NPT plugs for duplicate pressure taps, two 1/8" pipe thread to rubber tubing adapters and three flush mounting adapterswith screws. (Mounting and snap ring retainer substituted for three adapters in MP & HP gage accessories.)
Agency Approval:
RoHS. (Note: -SP models not RoHS approved.)
For applications with high cycle rate within gage total pressure rating, next higher rating is recommended. See Options Page.
*Low temperature models available as special option.

Features

  • Bezel provides flange for flush mounting in panel.
  • Clear plastic face is highly resistant to breakage. Provides undistorted viewing of pointer and scale.
  • Precision litho-printed scale is accurate and easy to read.
  • Red tipped pointer of heat treated aluminum tubing is easy to see. It is rigidly mounted on the helix shaft.
  • Pointer stops of molded rubber prevent pointer over-travel without damage.
  • "Wishbone" assembly provides mounting for helix, helix bearings and pointer shaft.
  • Jeweled bearings are shock-resistant mounted; provide virtually friction-free motion for helix. Motion damped with high viscosity silicone fluid.
  • Zero adjustment screw is conveniently located in the plastic cover, and is accessible without removing the cover. O-ring seal provides pressure tightness.
  • Helix is precision made from an alloy of high magnetic permeability. Mounted in jeweled bearings, it turns freely, following the magnetic field to move the pointer across the scale.
  • Calibrated range spring is flat spring steel. Small amplitude of motion assures consistency and long life. It reacts to pressure on diaphragm. Live length adjustable for calibration.
  • Silicone rubber diaphragm with integrally molded O-ring is supported by front and rear plates. It is locked and sealed in position with a sealing plate and retaining ring. Diaphragm motion is restricted to prevent damage due to overpressures.
  • Die cast aluminum case is precision made and iridite-dipped to withstand 168 hour salt spray corrosion test. Exterior finished in baked dark gray hammerloid. One case size is used for all standard pressure options, and for both surface and flush mounting.
  • OVERPRESSURE PROTECTION
    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.

Options

  • ASF Adjustable Signal Flag
  • HP High Pressure Option
  • LT Low Temperatures to -20°F
  • MP Med. Pressure Option
  • SP Setpoint Indicator
  • Scale Overlays Red, Green, Yellow, Mirrored or Combination, Specify Locations
  • Mounting
    A single case size is used for most models of Magnehelic® gages. They can be flush or surface mounted with standard hardware supplied. 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® gages 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.

Accessories

Model Number Description Usually Ships Price Order
A-135 Rubber gasket for panel mounting. Same Day $1.50 Order
A-286 4-1/2" Gage panel mounting flange Same Day $9.99 Order
A-299 Mounting bracket flush mount Magnehelic® gage in bracket. Bracket is then surface mounted . Steel with gray hammertone epoxy finish. 6.3" x 7.7" x 4.0", 1.30 lb. Same Day $31.00 Order
A-300 Flat aluminum bracket for flush mounting Magnehelic® gage. 6.8" x 6.0" x .1", .35 lb. Same Day $26.75 Order
A-310A 3-way vent valve, plastic, 1/8" NPT to 1/4" metal tubing, 80 psi rating, replaces former Model A-310 (brass). 2.3" x .8" x .1", .10 lb. Same Day $17.50 Order
A-320-A Enclosure for Series 2000 Magnehelic® Gages, DM-1000 Digital Differential Pressure Gages, DM-2000 Differential Pressure Transmitter, 4-9/16" (115.89 mm). Same Day $165.00 Order
A-321 Brass safety relief valve, protects Magnehelic® gage or Photohelic® switch/gage against over pressure due to regulator failure, etc, opens at 10 psi. Mounts in tee fitting. 1/4" NPT(M) (use two for DP application). .5" x .5" x 1.5", .10 .lb Same Day $36.50 Order
A-368 Surface mounting plate, aluminum, for Magnehelic® gage. Same Day $6.60 Order
A-369 Stand-hang bracket, aluminum, for Magnehelic® gage. Same Day $12.00 Order
A-371 Surface mounting bracket, use with Photohelic® switch/gage on horizontal or vertical surfaces, also for Capsu-Photohelic® switch/gage on vertical only. Also Magnehelic® -MP, -HP models. Same Day $37.75 Order
A-401 Plastic carrying case (7-9/16" x 5-7/8" x 2-13/16"). Same Day $26.25 Order
A-432 Plastic carrying case for Magnehelic® gage of standard range, except high pressure connection, includes 9 ft (2.7m) of 3/16" ID rubber tubing, stand-hang bracket & terminal tube with holder. 9.1" x 7.4" x 3.6", 1.30 .lb Same Day $48.00 Order
A-448 3-piece magnet kit for mounting Magnehelic® gage directly to a magnetic surface, 3.3" x 1.7" x .5", .20 .lb Same Day $10.75 Order
A-464 Flush mount kit for Magnehelic® gages. Same Day $20.00 Order
A-605 Air filter kit - adapts any standard Magnehelic® gage for use as an air filter gage. Includes aluminum surface mounting bracket with screws, (2) 5 ft (1.5 m) lengths of 1/4" aluminum tubing, (2) static pressure tips & (2) molded plastic vent valves. Same Day $36.25 Order
A-605B Air filter kit with (2) plastic open/close valves, (2) 4' steel static tips, tubing & mounting flange. Same Day $27.50 Order
A-605C Air filter kit with (2) plastic open/close valves, (2) plastic static tips, tubing & mounting flange. Same Day $22.25 Order
A-610 Pipe mounting kit for 1-1/4" to 2" pipe. 5.6" x 4.6" x 1.4", 1.0 .lb Same Day $26.50 Order
SWUK1 Strap wrench. 14.6" x 5.8" x 1.3", .55 .lb Consult Factory $32.00 Order

Videos

Model Chart

EXAMPLE

2000-00N ASF Series 2000-00N-ASF Magnehelic® Differential Pressure Gage, range .05-0-.20" w.c., with adjustable signal flag.
RANGE 2000-00N
2000-00
2000-0
2001
2002
2003
2004
2005
2006
2008
2010
2012
2015
2020
2025
2030
2040
2045
2050
2060
2080
2100
2120
2150
2160
2180
2200
2250
2300
2400
2500
2300-00
2300-0
2301
2302
2304
2305
2306
2308
2310
2312
2316
2320
2330
2340
2350
2360
2380
23100
23150
2000-1FTWC
2000-1.5FTWC
2000-2FTWC
2000-2.5FTWC
2000-3FTWC
2000-4FTWC
2000-5FTWC
2000-6FTWC
2000-8FTWC
2000-10FTWC
2000-12FTWC
2000-12.5FTWC
2000-15FTWC
2000-20FTWC
2000-25FTWC
2000-30FTWC
2000-35FTWC
2000-40FTWC
2000-50FTWC
2000-60FTWC
2000-00D
2000-0D
2001D
2002D
2003D
2004D
2005D
2006D
2008D
2010D
2015D
2020D
2025D
2030D
2040D
2050D
2060D
2100D
2200D
2310D
2000-00AV
2000-0AV
2001AV
2002AV
2005AV
2010AV
2015AV
2020AV
2025AV
2000-00MV
2000-0MV
2001MV
2002MV
2005MV
2008MV
2015MV
2020MV
2024MV
2201
2202
2203
2204
2205
2206
2208
2210
2215
2220
2230
2000-0.25HG
2000-05HG
2000-1HG
2000-1.5HG
2000-2HG
2000-3HG
2000-4HG
2000-5HG
2000-6HG
2000-7HG
2000-8HG
2000-9HG
2000-10HG
2000-11HG
2000-12HG
2000-15HG
2000-16HG
2000-20HG
2000-25HG
2000-30HG
2000-40HG
2000-50HG
2000-60HG
2300-0.5HG
2300-1HG
2300-2HG
2300-10HG
2300-30HG
2000-0.5MMHG
2000-1MMHG
2000-2MMHG
2000-4MMHG
2000-5MMHG
2000-6MMHG
2000-7MMHG
2000-8MMHG
2000-9MMHG
2000-10MMHG
2000-11MMHG
2000-12MMHG
2000-15MMHG
2000-20MMHG
2000-25MMHG
2000-30MMHG
2000-35MMHG
2000-40MMHG
2000-50MMHG
2000-60MMHG
2000-80MMHG
2000-100MMHG
2000-150MMHG
2000-200MMHG
2000-250MMHG
2000-300MMHG
2000-350MMHG
2000-400MMHG
2300-60MMHG
2000-6MM
2000-8MM
2000-10MM
2000-12MM
2000-15MM
2000-20MM
2000-25MM
2000-30MM
2000-35MM
2000-40MM
2000-50MM
2000-60MM
2000-75MM
2000-80MM
2000-100MM
2000-125MM
2000-150MM
2000-200MM
2000-250MM
2000-300MM
2000-350MM
2000-375MM
2000-400MM
2000-500MM
2000-600MM
2000-700MM
2000-750MM
2000-800MM
2000-1000MM
2000-1200MM
2000-1500MM
2000-1600MM
2000-1800MM
2000-2000MM
2000-3000MM
2000-4000MM
2000-5000MM
2300-6MM
2300-10MM
2300-12MM
2300-14MM
2300-20MM
2300-30MM
2300-40MM
2300-50MM
2300-60MM
2300-80MM
2300-100MM
2300-150MM
2300-160MM
2300-200MM
2300-250MM
2300-300MM
2300-320MM
2300-400MM
2300-450MM
2300-500MM
2300-600MM
2300-700MM
2300-750MM
2300-800MM
2300-1000MM
2000-1.5CM
2000-2CM
2000-2.5CM
2000-3CM
2000-4CM
2000-5CM
2000-6CM
2000-8CM
2000-10CM
2000-15CM
2000-20CM
2000-25CM
2000-30CM
2000-35CM
2000-40CM
2000-50CM
2000-60CM
2000-80CM
2000-100CM
2000-125CM
2000-150CM
2000-200CM
2000-250CM
2000-300CM
2000-350CM
2000-400CM
2000-500CM
2000-600CM
2000-700CM
2000-1000CM
2300-2CM
2300-3CM
2300-4CM
2300-5CM
2300-10CM
2300-20CM
2300-30CM
2300-40CM
2300-50CM
2300-60CM
2300-80CM
2300-100CM
2000-60NPA
2000-60PA
2000-100PA
2000-125PA
2000-150PA
2000-200PA
2000-250PA
2000-300PA
2000-350PA
2000-400PA
2000-500PA
2000-700PA
2000-750PA
2000-800PA
2000-1000PA
2000-100x10PA
2000-1250PA
2000-125X10PA
2000-1500PA
2000-150X10PA
2000-2000PA
2000-200X10PA
2000-2500PA
2000-250X10PA
2000-3000PA
2000-300X10PA
2000-4500PA
2000-450X10PA
2000-5000PA
2000-500X10PA
2000-6000PA
2000-600X10PA
2000-8000PA
2000-800X10PA
2300-60PA
2300-80PA
2300-100PA
2300-120PA
2300-200PA
2300-250PA
2300-300PA
2300-400PA
2300-500PA
2300-600PA
2300-1000PA
2300-1200PA
2300-1400PA
2300-2000PA
2300-200X10PA
2300-3000PA
2300-300X10PA
2300-5000PA
2300-500X10PA
2300-6000PA
2300-600X10PA
2000-0.1KPA
2000-0.2KPA
2000-0.3KPA
2000-0.5KPA
2000-1KPA
2000-1.25KPA
2000-1.5KPA
2000-2KPA
2000-2.5KPA
2000-3KPA
2000-3.5KPA
2000-4KPA
2000-5KPA
2000-6KPA
2000-8KPA
2000-10KPA
2000-12KPA
2000-12.5KPA
2000-15KPA
2000-20KPA
2000-25KPA
2000-30KPA
2000-35KPA
2000-40KPA
2000-50KPA
2000-60KPA
2000-70KPA
2000-75KPA
2000-80KPA
2000-100KPA
2000-140KPA
2000-170KPA
2000-200KPA
2300-0.4KPA
2300-1KPA
2300-2KPA
2300-2.5KPA
2300-3KPA
2300-4KPA
2300-5KPA
2300-6KPA
2300-7KPA
2300-7.5KPA
2300-8KPA
2300-10KPA
2300-12KPA
2300-16KPA
2300-20KPA
2000-1MBAR
2000-1.5MBAR
2000-2MBAR
2000-2.5MBAR
2000-3MBAR
2000-4MBAR
2000-5MBAR
2000-6MBAR
2000-8MBAR
2000-10MBAR
2000-12MBAR
2000-15MBAR
2000-20MBAR
2000-25MBAR
2000-30MBAR
2000-35MBAR
2000-40MBAR
2000-50MBAR
2000-60MBAR
2000-75MBAR
2000-80MBAR
2000-100MBAR
2000-125MBAR
2000-150MBAR
2000-200MBAR
2000-250MBAR
2000-300MBAR
2000-350MBAR
2000-400MBAR
2000-500MBAR
2000-600MBAR
2000-700MBAR
2000-800MBAR
2000-1000MBAR
2300-2MBAR
2300-3MBAR
2300-4MBAR
2300-5MBAR
2300-6MBAR
2300-10MBAR
2300-20MBAR
2300-24MBAR
2300-30MBAR
2300-40MBAR
2300-50MBAR
2300-60MBAR
2300-70MBAR
2300-80MBAR
2300-100MBAR
2300-500MBAR
2000-0.5ZPSI
2000-1ZPSI
2000-2ZPSI
2000-3ZPSI
2000-4ZPSI
2000-6ZPSI
2000-8ZPSI
2000-10ZPSI
2000-15ZPSI
2000-16ZPSI
2000-20ZPSI
2000-30ZPSI
2000-32ZPSI
2000-40ZPSI
2000-50ZPSI
2000-80ZPSI
2000-100ZPSI
2300-2ZPSI
2000-0.2BAR
2000-0.5BAR
2000-1BAR
2000-1.5BAR
2000-2BAR
2000-0.5KG
2000-1KG
2000-1.5KG
2000-2KG
2000-10VF1
2000-10VF2
2000-10VF3
2000-01VF4
2000-10VF5
2000-20VF1
2000-20VF2
2000-20VF3
2000-20VF4
2000-20VF5
2000-40VF1
2000-40VF2
2000-40VF3
2000-40VF4
2000-40VF5
  05-0-.20" w.c.
0-.25" w.c.
0-.5" w.c.
0-1" w.c.
0-2" w.c.
0-3" w.c.
0-4" w.c.
0-5" w.c.
0-6" w.c.
0-8" w.c.
0-10" w.c.
0-12" w.c.
0-15" w.c.
0-20" w.c.
0-25" w.c.
0-30" w.c.
0-40" w.c.
0-45" w.c.
0-50" w.c.
0-60" w.c.
0-80" w.c.
0-100" w.c.
0-120" w.c.
0-150" w.c.
0-160" w.c.
0-180" w.c.
0-200" w.c.
0-250" w.c.
0-300" w.c.
0-400" w.c.
0-500" w.c.
0.125-0-0.125" w.c.
0.25-0-0.25" w.c.
0.5-0-0.5" w.c.
1-0-1" w.c.
2-0-2" w.c.
2.5-0-2.5" w.c.
3-0-3" w.c.
4-0-4" w.c.
5-0-5" w.c.
6-0-6" w.c.
8-0-8" w.c.
10-0-10" w.c.
15-0-15" w.c.
20-0-20" w.c.
25-0-25" w.c.
30-0-30" w.c.
40-0-40" w.c.
50-0-50" w.c.
75-0-75" w.c.
0-1 ft w.c.
0-1.5 ft w.c.
0-2 ft w.c.
0-2.5 ft w.c.
0-3 ft w.c.
0-4 ft w.c.
0-5 ft w.c.
0-6 ft w.c.
0-8 ft w.c.
0-10 ft w.c.
0-12 ft w.c.
0-12.5 ft w.c.
0-15 ft w.c.
0-20 ft w.c.
0-25 ft w.c.
0-30 ft w.c.
0-35 ft w.c.
0-40 ft w.c.
0-50 ft w.c.
0-60 ft w.c.
0-0.25" w.c. & 0-62 Pa
0-0.5" w.c. & 0-125 Pa
0-1" w.c. & 0-250 Pa
0-2" w.c. & 0-500 Pa
0-3" w.c. & 0-750 Pa
0-4" w.c. & 0-1 kPa
0-5" w.c. & 0-1.25 kPa
0-6" w.c. & 0-1.5 kPa
0-8" w.c. & 0-2 kPa
0-10" w.c. & 0-2.5 kPa
0-15" w.c. & 0-3.7 kPa
0-20" w.c. & 0-5 kPa
0-25" w.c. & 0-5.2 kPa
0-30" w.c. & 0-7.5 kPa
0-40" w.c. & 0-10 kPa
00-50" w.c. & 0-12.4 kPa
0-60" w.c. & 0-15 kPa
0-100" w.c. & 0-25 kPa
0-200" w.c. & 0-50 kPa
5-0-5" w.c. & 1.25-0-1.25 kPa
0-0.25" w.c. & 0-2000 fpm
0-0.5" w.c. & 0-2800 fpm
0-1" w.c. & 0-4000 fpm
0-2" w.c. & 0-5600 fpm
0-5" w.c. & 0-8800 fpm
0-10" w.c. & 0-12500 fpm
0-15" w.c. & 0-15500 fpm
0-20" w.c. & 0-17500 fpm
0-25" w.c. & 0-20000 fpm
0-60 Pa & 0-9.8 m/s
0-125 Pa & 0-14.4 m/s
0-250 Pa & 0-20 m/s
0-500 Pa & 0-28 m/s
0-1.25 kPa & 0-45 m/s
0-2 kPa & 0-57 m/s
0-3.5 kPa & 0-76 m/s
0-5 kPa & 0-90 m/s
0-6 kPa & 0-98 m/s
0-1 psid
0-2 psid
0-3 psid
0-4 psid
0-5 psid
0-6 psid
0-8 psid
0-10 psid
0-15 psid
0-20 psid
0-30 psid
0-.25" Hg
0-.5" Hg
0-1" Hg
0-1.5" Hg
0-2" Hg
0-3" Hg
0-4" Hg
0-5" Hg
0-6" Hg
0-7" Hg
0-8" Hg
0-9" Hg
0-10" Hg
0-11" Hg
0-12" Hg
0-15" Hg
0-16" Hg
0-20" Hg
0-25" Hg
0-30" Hg
0-40" Hg
0-50" Hg
0-60" Hg
0.25-0-0.25" Hg
0.5-0-0.5" Hg
1-0-1" Hg
5-0-5" Hg
15-0-15" Hg
0-0.5 mm Hg
0-1 mm Hg
0-2 mm Hg
0-4 mm Hg
0-5 mm Hg
0-6 mm Hg
0-7 mm Hg
0-8 mm Hg
0-9 mm Hg
0-10 mm Hg
0-11 mm Hg
0-12 mm Hg
0-15 mm Hg
0-20 mm Hg
0-25 mm Hg
0-30 mm Hg
0-35 mm Hg
0-40 mm Hg
0-50 mm Hg
0-60 mm Hg
0-80 mm Hg
0-100 mm Hg
0-150 mm Hg
0-200 mm Hg
0-250 mm Hg
0-300 mm Hg
0-350 mm Hg
0-400 mm Hg
30-0-30 mm Hg
0-6 mm w.c.
0-8 mm w.c.
0-10 mm w.c.
0-12 mm w.c.
0-15 mm w.c.
0-20 mm w.c.
0-25 mm w.c.
0-30 mm w.c.
0-35 mm w.c.
0-40 mm w.c.
0-50 mm w.c.
0-60 mm w.c.
0-75 mm w.c.
0-80 mm w.c.
0-100 mm w.c.
0-125 mm w.c.
0-150 mm w.c.
0-200 mm w.c.
0-250 mm w.c.
0-300 mm w.c.
0-350 mm w.c.
0-375 mm w.c.
0-400 mm w.c.
0-500 mm w.c.
0-600 mm w.c.
0-700 mm w.c.
0-750 mm w.c.
0-800 mm w.c.
0-100 x 10 mm w.c.
0-120 x 10 mm w.c.
0-150 x 10 mm w.c.
0-160 x 10 mm w.c.
0-180 x 10 mm w.c.
0-200 x 10 mm w.c.
0-300 x 10 mm w.c.
0-400 x 10 mm w.c.
0-500 x 10 mm w.c.
3-0-3 mm w.c.
5-0-5 mm w.c.
6-0-6 mm w.c.
7-0-7 mm w.c.
10-0-10 mm w.c.
15-0-15 mm w.c.
20-0-20 mm w.c.
25-0-25 mm w.c.
30-0-30 mm w.c.
40-0-40 mm w.c.
50-0-50 mm w.c.
75-0-75 mm w.c.
80-0-80 mm w.c.
100-0-100 mm w.c.
125-0-125 mm w.c.
150-0-150 mm w.c.
160-0-160 mm w.c.
200-0-200 mm w.c.
225-0-225 mm w.c.
250-0-250 mm w.c.
300-0-300 mm w.c.
350-0-350 mm w.c.
375-0-375 mm w.c.
400-0-400 mm w.c.
500-0-500 mm w.c.
0-1.5 cm w.c.
0-2 cm w.c.
0-2.5 cm w.c.
0-3 cm w.c.
0-4 cm w.c.
0-5 cm w.c.
0-6 cm w.c.
0-8 cm w.c.
0-10 cm w.c.
0-15 cm w.c.
0-20 cm w.c.
0-25 cm w.c.
0-30 cm w.c.
0-35 cm w.c.
0-40 cm w.c.
0-50 cm w.c.
0-60 cm w.c.
0-80 cm w.c.
0-100 cm w.c.
0-125 cm w.c.
0-150 cm w.c.
0-200 cm w.c.
0-250 cm w.c.
0-300 cm w.c.
0-350 cm w.c.
0-400 cm w.c.
0-500 cm w.c.
0-600 cm w.c.
0-700 cm w.c.
0-100 x 10 cm w.c.
1-0-1 cm w.c.
1.5-0-1.5 cm w.c.
2-0-2 cm w.c.
2.5-0-2.5 cm w.c.
5-0-5 cm w.c.
10-0-10 cm w.c.
15-0-15 cm w.c.
20-0-20 cm w.c.
25-0-25 cm w.c.
30-0-30 cm w.c.
40-0-40 cm w.c.
50-0-50 cm w.c.
10-0-50 Pa
0-60 Pa
0-100 Pa
0-125 Pa
0-150 Pa
0-200 Pa
0-250 Pa
0-300 Pa
0-350 Pa
0-400 Pa
0-500 Pa
0-700 Pa
0-750 Pa
0-800 Pa
0-1000 Pa
0-100 x 10 Pa
0-1250 Pa
0-125 x 10 Pa
0-1500 Pa
0-150 x 10 Pa
0-2000 Pa
0-200 x 10 Pa
0-2500 Pa
0-250 x 10 Pa
0-3000 Pa
0-300 x 10 Pa
0-4500 Pa
0-450 x 10 Pa
0-5000 Pa
0-500 x 10 Pa
0-6000 Pa
0-600 x 10 Pa
0-8000 Pa
0-800 x 10 Pa
30-0-30 Pa
40-0-40 Pa
50-0-50 Pa
60-0-60 Pa
100-0-100 Pa
125-0-125 Pa
150-0-150 Pa
200-0-200 Pa
250-0-250 Pa
300-0-300 Pa
500-0-500 Pa
600-0-600 Pa
700-0-700 Pa
1000-0-1000 Pa
100-0-100 x 10 Pa
1500-0-1500 Pa
150-0-150 x 10 Pa
2500-0-2500 Pa
250-0-250 x 10 Pa
3000-0-3000 Pa
300-0-300 x 10 Pa
0-0.1 kPa
0-0.2 kPa
0-0.3 kPa
0-0.5 kPa
0-1 kPa
0-1.25 kPa
0-1.5 kPa
0-2 kPa
0-2.5 kPa
0-3 kPa
0-3.5 kPa
0-4 kPa
0-5 kPa
0-6 kPa
0-8 kPa
0-10 kPa
0-12 kPa
0-12.5 kPa
0-15 kPa
0-20 kPa
0-25 kPa
0-30 kPa
0-35 kPa
0-40 kPa
0-50 kPa
0-60 kPa
0-70 kPa
0-75 kPa
0-80 kPa
0-100 kPa
0-140 kPa
0-170 kPa
0-200 kPa
0.2-0-0.2 kPa
0.5-0-0.5 kPa
1-0-1 kPa
1.25-0-1.25 kPa
1.5-0-1.5 kPa
2-0-2 kPa
2.5-0-2.5 kPa
3-0-3 kPa
3.5-0-3.5 kPa
3.75-0-3.75 kPa
4-0-4 kPa
5-0-5 kPa
6-0-6 kPa
8-0-8 kPa
10-0-10 kPa
0-1 Millibar
0-1.5 Millibar
0-2 Millibar
0-2.5 Millibar
0-3 Millibar
0-4 Millibar
0-5 Millibar
0-6 Millibar
0-8 Millibar
0-10 Millibar
0-12 Millibar
0-15 Millibar
0-20 Millibar
0-25 Millibar
0-30 Millibar
0-35 Millibar
0-40 Millibar
0-50 Millibar
0-60 Millibar
0-75 Millibar
0-80 Millibar
0-100 Millibar
0-125 Millibar
0-150 Millibar
0-200 Millibar
0-250 Millibar
0-300 Millibar
0-350 Millibar
0-400 Millibar
0-500 Millibar
0-600 Millibar
0-700 Millibar
0-800 Millibar
0-100 x 10 Millibar
1-0-1 Millibar
1.5-0-1.5 Millibar
2-0-2 Millibar
2.5-0-2.5 Millibar
3-0-3 Millibar
5-0-5 Millibar
10-0-10 Millibar
12-0-12 Millibar
15-0-15 Millibar
20-0-20 Millibar
25-0-25 Millibar
30-0-30 Millibar
35-0-35 Millibar
40-0-40 Millibar
50-0-50 Millibar
250-0-250 Millibar
0-0.5 ounces per square inch
0-1 ounces per square inch
0-2 ounces per square inch
0-3 ounces per square inch
0-4 ounces per square inch
0-6 ounces per square inch
0-8 ounces per square inch
0-10 ounces per square inch
0-15 ounces per square inch
0-16 ounces per square inch
0-20 ounces per square inch
0-30 ounces per square inch
0-32 ounces per square inch
0-40 ounces per square inch
0-50 ounces per square inch
0-80 ounces per square inch
0-100 ounces per square inch
1-0-1 ounces per square inch
0-0.20 bar
0-0.5 bar
0-1 bar
0-1.5 bar
0-2 bar
0-0.5 kg/cm²
0-1 kg/cm²
0-1.5 kg/cm²
0-2 kg/cm²
0-10" w.c. & 0-20 SCFM air (w/1" NPT Tube)
0-10" w.c. & 0-50 SCFM air (w/1.5" NPT Tube)
0-10" w.c. & 0-85 SCFM air (w/2" NPT Tube)
0-10" w.c. & 0-200 SCFM air (w/3" NPT Tube)
0-10" w.c. & 0-350 SCFM air (w/4" NPT Tube)
0-20" w.c. & 0-30 SCFM air (w/1" NPT Tube)
0-20" w.c. & 0-70 SCFM air (w/1.5" NPT Tube)
0-20" w.c. & 0-120 SCFM air (w/2" NPT Tube)
0-20" w.c. & 0-290 SCFM air (w/3" NPT Tube)
0-20" w.c. & 0-500 SCFM air (w/4" NPT Tube)
0-40" w.c. & 0-40 SCFM air (w/1" NPT Tube)
0-40" w.c. & 0-100 SCFM air (w/1.5" NPT Tube)
0-40" w.c. & 0-160 SCFM air (w/2" NPT Tube)
0-40" w.c. & 0-395 SCFM air (w/3" NPT Tube)
0-40" w.c. & 0-675 SCFM air (w/4" NPT Tube)
 
OPTIONS   ASF
AT
BUNA
CB
COO
G
HC
HP
IC
LT
M
MP
NIST
R
SB
SF
SPCL
ST
TA
VIT
Y
Adjustable Signal Flag
Aluminum Tag
Buna-N Elastomers
Chrome Bezel
Certificate of Origin
Green Scale Overlay
Horizontal Calibration
High Pressure
Impregnated Case
Low Temperature
Mirror Scale Overlay
Medium Pressure
NIST Certificate of Calibration
Red Scale Overlay
304 Stainless Steel Bezel
Silicone Free
Special Cleaning
Stainless Steel Tag
Tilt Angle from Vertical in Degrees
Fluoroelastomers
Yellow Scale Overlay

Product Literature

Manuals

Catalog Pages

Approvals

Drawings

Questions

Question
How will installation of a Magnehelic® gage 150' away from the pressure source affect accuracy?
Answer
Accuracy will not be affected, but response time will be increased in proportion to the length of the tubing.
Question
Can the standard Magnehelic® or Capsuhelic® gage be installed outdoors?
Answer
Yes. Front covers are sealed with "O" rings. Capsuhelic vent holes are plugged with foam, and the new high impact acrylic lens material is very resistant to ultra-violet fogging. Additional care is recommended to lead pressure connections downward from the gage and provide as much protection from the elements as possible
Question
Can a standard Magnehelic® gage be used for natural gas or propane service?
Answer
No. As the silicone diaphragm will be attacked by these gases. A Buna-N diaphragm should be specified.
Question
What happens when a Magnehelic® gage equipped with the low temperature option is operated below -20 degrees Fahrenheit (-29 degrees Celsius)?
Answer
Below that temperature the accuracy of the gage deteriorates beyond our published specification due to stiffening of the diaphragm.
Question
What restrictions, if any, are imposed for the Magnehelic® and Photohelic® gages in vacuum service?
Answer
In applications involving higher vacuums than 20" Hg, leakage due to gage housing porosity becomes the limiting factor.
Question
Is National Institute of Standards and Technology traceability available for the Magnehelic® Gage?
Answer
No. But Magnehelic® gages can be given a special 6 point calibration check with an NIST traceable master gage and a certificate can be supplied.
Question
How do I hook up my Magnehelic® Gage?
Answer
In Bulletin A-27 under operation, it explains how to connect the Magnehelic to the following applications: positive pressure, negative pressure, and differential pressure.
Question
How do I hook up my Magnehelic® gage for an air velocity application with a pitot tube?
Answer
In our Application Guides on flow products, we explain very well how to take air velocity readings. The total pressure connection on the pitot tube is connected to one of the high pressure ports on the gage. The other high pressure port is plugged. The static pressure connection on the pitot tube is connected to one of the low pressure ports on the gage. The other low pressure port is plugged.
Question
Are air velocity scales available?
Answer
Yes, the information we require to supply the proper range is the velocity (fpm or m/s) or velocity pressure (inches of water or kpa) and density of air (lb/ft3 or g/cm3).
Question
Why must Dwyer pressure switches be mounted with the diaphragm in the vertical plane?
Answer
In other than a vertical plane, the diaphragm can sag and cause a shift in set-point or a change in the adjustable set-point range. The switch may even fail to reset at the minimum set-points. This is the same phenomena that causes inaccuracy in Magnehelic® and Capsuhelic® gages when mounted in other than a vertical position.
Question
Can the ASF option be used as a tattle tell? Or do you have something that could be used as a tattle tell on the 2000 series DP gages?
Answer
The ASF option cannot be used as a tattle tell. It is just there for visual indication of a set point. We have nothing with our 2000 series that can act as a tattle tell, however our series DM-1000 DigiMag will have a peak valve function built in.
Question
Can the Vaneometer model 480 be equiped with a scale to read in inches of water? We want to use the vaneometer to assure we have a pressure differential of -0.01 wc when measured at the door gap to an patient isolation room.
Answer
The series 480 does not come with a scale reading in inches w.c., the scales would be in velocity units to read air velocity. However, we do have differential pressure gages or manometers than can be used to measure the differential pressure in an inches w.c. scale. I would recommend taking a look at our Series 2000 Magnehelic® Differential Pressure Gage, as we do have many customers use these for clean room applications. We have the model number 2000-00N which has a range of 0-0.2. and the major grads will be 0.01” w.c.
Question
Your Magnehelic gauge doesn't come with a calibration certificate, do you have any documentation for these gauges to meet these needs?
Answer
We have 3 options: (1) We can supply a Certificate of Conformance at no charge if you request that certificate at the time of order. The Certificate of conformance would state that each Magnehelic gauge is calibrated to meet the specifications stated on the spec sheet. (2) We offer a factory calibration “-FC” as an option that is a certificate of the standard calibration points at the time of manufacture, for a small fee. (3) We can also provide a NIST-traceable calibration for an extra charge per gage if that is required. To get the NIST-traceable calibration, you would simply add a “-NIST” to the end of your part number. NIST-traceable calibrations will come with the 6 point calibration certificate. We recommend “periodic calibration” for our Magnehelic, though we leave the specific time-frame up to the end user, since different organizations have different requirements (i.e. government groups often require more frequent calibrations.) If you choose to have the NIST traceable calibration done, the NIST group (the National Institute of Standards and Technology) dictates yearly calibration and it will be printed on the certificate.
Question
What might be the cause for Magnehelic® gages filling approximately 1/3 full of water, with lots of liquid droplets on the glass. Both are outside mounted on the side of an air stripping tower. One is a differential pressure gage that measures the pressure drop across a pitot tube. The other just measures the back pressure in the stripper. What can be done to fix the malfunction?
Answer
It looks like you’re getting some condensation in the Magnehelic®, which is causing it to collect on the bottom of the face. Since the Magnehelic® is not encapsulated, it is not recommended to be used in applications where moisture can form. One option to fix the problem is installing a liquid filter (like an F222) to filter out that moisture. Another option is to install a Capsuhelic (Series 4000), which is made to handle both air and liquid.

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