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MAGNEHELIC

DIFFERENTIAL PRESSURE GAGES

Indicate Positive, Negative or Differential, Accurate within 1%

RUBBER PRESSURE RELIEF PLUG

WILL UNSEAT ITSELF WHEN GAGE

IS OVERPRESSURIZED

[3] 6-32 X 3/16 [4.76] DEEP

HOLES EQUALLY SPACED ON

A Ø4-1/8 [104.78] BOLT CIRCLE

FOR PANEL MOUNTING

1/8 FEMALE NPT

HIGH PRESSURE

CONNECTION

1-3/4

[44.45]

1/2

[12.70]

1/8 FEMALE NPT LOW

PRESSURE CONNECTION

11/16

[17.46]

15/32 [11.91]

1-11/16 [42.86]

Ø4-1/2

[114.3]

1-1/4 [31.75]

17/32

[13.49]

.025 [.64] SPACE CREATED BY 3 SPACER

PADS WHEN SURFACE MOUNTED.

DO NOT OBSTRUCT. PROVIDES PATH

FOR RELIEF OF OVERPRESSURE.

1/8 FEMALE

NPT HIGH

PRESSURE

CONNECTION

1/8 FEMALE

NPT LOW

PRESSURE

CONNECTION

7/16 [11.11]

Ø4-3/4

[120.65]

Differential Pressure Gages

PRESSURE

1/8 FEMALE NPT

HIGH PRESSURE

CONNECTION

1-3/4

[44.45]

1/2

[12.70]

1/8 FEMALE

NPT LOW

PRESSURE

CONNECTION

11/16

[17.46]

17/32

[13.49]

ø4-3/4 [120.65]

PANEL CUTOUT

ø5

[127]

ø4-47/64

[120.27]

3/16

[4.76]

2-17/32

[64.29]

15/32

[11.91]

ø4-1/2

[114.3]

1-1/4

[31.75]

ø5-1/2

[139.70]

MOUNTING RING

Select the Series 2000 Magnehelic

Differential Pressure Gages for a versatile low

differential pressure gage with a wide choice of 81 models and 27 options to choose

from. Using Dwyer’s simple, frictionless Magnehelic

gage movement, it quickly

indicates air or non-corrosive gas pressures--either positive, negative (vacuum) or

differential. The design resists shock, vibration, over-pressures and is weatherproof

to IP67.

Select the –HA High Accuracy Magnehelic

gage option for an accuracy within 1%

of full-scale. Also included with the –HA option at no extra cost are a mirrored scale

overlay and a 6 point calibration certicate.

FEATURES/BENEFITS

• Easy to read gage through undistorted plastic face permits viewing from far away

• Patented design provides quick response to pressure changes means no delay in

assessing critical situations

• Durable and rugged housing and high-quality components combine to provide long-

service life and minimized down-time

• High accuracy option is twice as accurate as the standard Magnehelic

gage

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

uOver Protection Note: See page 21 (Series 2000)

A-432 A-605

SERIES 2000

High Accuracy Magnehelic

gage

Note: Shown with optional -SS bezel

Standard Magnehelic

gage

DWYER INSTRUMENTS, INC. | dwyer-inst.com20

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 nish is

coated gray to withstand 168 hour salt spray corrosion test.

Accuracy: ±2% (-HA model ±1) of FS (±3% (-HA ±1.5%) on -0, -100PA, -125PA,

-10MM and ±4% (-HA ±2%) on -00, -60PA, -6MM ranges), throughout range at 70°F

(21.1°C).

Pressure Limits: -20 in Hg to 15 psig (-0.677 to 1.034 bar); MP option: 35 psig

(2.41 bar); HP option: 80 psig (5.52 bar).

Enclosure Rating: IP67.

Overpressure: Relief plug opens at approximately 25 psig (1.72 bar), standard

gages only.u

Temperature Limits: 20 to 140°F* (-6.67 to 60°C). -20°F (-28°C) with low

temperature option.

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 adapter, and three ush mounting adapters with

screws. (Mounting and snap ring retainer substituted for three adapters in MP & HP

gage accessories.)

Agency Approvals: Meets the technical requirements of EU Directive 2011/65/EU

(RoHS II). Note: -SP models not RoHS approved.

Note: For applications with high cycle rate within gage total pressure rating, next

higher rating is recommended. See Medium and High pressure options.

*Low temperature models available as special options.

ACCESSORIES

Model Description

A-432

A-605

A-605B

A-605C

Portable kit; combine carrying case with any Magnehelic

gage of

standard range, except high pressure connection. Includes 9 ft (2.7

m) of 3/16˝ ID rubber tubing, standhang bracket and terminal tube

with holder

Air lter gage accessory kit; adapts any standard Magnehelic

gage

for use as an air lter gage. Includes aluminum surface mounting

bracket with screws, two 5 ft (1.5 m) lengths of 1/4˝ aluminum tubing,

two static pressure tips and two molded plastic vent valves, integral

compression ttings on both tips and valves

Air lter gage accessory kit; air lter kit with two plastic open/close

valves, two 4˝ steel static tips, plastic tubing and mounting ange

Air lter gage accessory kit; air lter kit with two plastic open/close

valves, two plastic static tips, plastic tubing and mounting ange

YEAR LIMITED

WARRANTY

Pressure_2021.indb 20 7/15/20 8:09 AM

Summary of content (4 pages)

PAGE 1
PRESSURE SERIES 2000 MAGNEHELIC® DIFFERENTIAL PRESSURE GAGES Indicate Positive, Negative or Differential, Accurate within 1% YEAR LIMITED WARRANTY RUBBER PRESSURE RELIEF PLUG WILL UNSEAT ITSELF WHEN GAGE IS OVERPRESSURIZED .025 [.64] SPACE CREATED BY 3 SPACER PADS WHEN SURFACE MOUNTED. 17/32 DO NOT OBSTRUCT. PROVIDES PATH [13.49] FOR RELIEF OF OVERPRESSURE. 1/8 FEMALE NPT HIGH PRESSURE 1-1/4 [31.75] CONNECTION 1/8 FEMALE Ø4-1/2 NPT LOW [114.3] PRESSURE CONNECTION Ø4-3/4 15/32 [11.91] [120.
PAGE 2
MAGNEHELIC® DIFFERENTIAL PRESSURE GAGES Indicate Positive, Negative or Differential, Accurate within 1% YEAR LIMITED WARRANTY Bezel provides flange for flush mounting in panel. O-ring seal for cover assures pressure integrity of case. Clear plastic face is highly resistant to breakage. Provides undistorted viewing of pointer and scale.
PAGE 3
PRESSURE HIGH ACCURACY MAGNEHELIC® DIFFERENTIAL PRESSURE GAGE YEAR LIMITED WARRANTY OPTIONS - HIGH ACCURACY MAGNEHELIC® GAGE To order add suffix: Description -HA High accuracy Magnehelic® gage. Accuracy within 1% and weatherproof.
PAGE 4
PRESSURE MAGNEHELIC® GAGE MOUNTING ACCESSORIES Pressure reference port A-610 A-369 A-464 A-299 A-286 A-300 A-368 A-371 VIDEO ON NE LI A single case size is used for most models of Magnehelic® gages. They can be flush or surface mounted with standard hardware supplied. Complete mounting and connection fittings plus instructions are furnished with each instrument. A 4-9/16˝ hole is required for flush panel mounting. Flush mounting is easily accomplished with the new A-300 Flush Mounting bracket.