Dwyer Instruments 2000 Specifications

Series

R

oHS

1

/8 FEMALE NPT

H

IGH PRESSURE

C

ONNECTION

1-3/4

[44.45]

1

/2

[

12.70]

1

/8 FEMALE

N

PT LOW

P

RESSURE

C

ONNECTION

11/16

[

17.46]

17/32

[13.49]

ø

4-3/4 [120.65]

P

ANEL CUTOUT

ø

5

[

127]

ø4-47/64

[120.27]

3

/16

[

4.76]

2-17/32

[64.29]

1

5/32

[11.91]

ø4-1/2

[114.3]

1

-1/4

[

31.75]

ø

5-1/2

[

139.70]

MOUNTING RING

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

P

RESSURE CONNECTION

11/16

[17.46]

15/32 [11.91]

1-11/16 [42.86]

Ø4-1/2

[114.3]

1

-1/4 [31.75]

1

7/32

[

13.49]

.

025 [.64] SPACE CREATED BY 3 SPACER

P

ADS WHEN SURFACE MOUNTED.

D

O NOT OBSTRUCT. PROVIDES PATH

F

OR 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]

2000

Magnehelic®Differential Pressure Gages

PRESSURE

Differential Pressure Gages

can here

S

o watch

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roduct video

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Select the Dwyer®Magnehelic®gage for high accuracy — guaranteed within 2%

full-scale — and for the wide choice of 81 models available to suit your needs precisely. Using
Dwyer's simple, frictionless Magnehelic
non-corrosive gas pressures — either positive, negative
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
levels with bubbler systems and pressures in fluid amplifier or f luidic systems. It also
checks gas-air ratio controls and automatic valves, and monitors blood and respirator y
pressures in medical care equipment.

MOUNTING

A single case size is used for most models of Magnehelic
flush or surface mounted
vertical position, many ranges above 1˝ may be used at any angle by simply re­zeroing. However, for maximum accuracy, they must be calibrated in the same
position in which they are used. These characteristics make Magnehelic
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

velocity, furnace draft, pressure drop across orifice plates, liquid

with standard hardware sup

®

gage movement, it quickly

u

Model A-432 Portable Kit

Combine carrying case with any Magnehelic
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.

Indicate Positive, Negative or Differential, Accurate within 2%

(vacuum) or differential. The

plied. Although calibrated for

indicates low air or

®

gages. They can be

®

gages

®

gage

of

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,

-100 Pa, -125 Pa, 10MM and ±4% on

- 00, -60 Pa, -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).
Overpressure: Relief plug opens at
approximately 25 psig (1.72 bar),
standard gages only.

†For applications with high cycle rate within gage total pressure rating, next higher
rating is recommended. See Medium and High pressure options.

v

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 flush mounting
adapters with screws. (Mounting and
snap ring retainer substituted for three
adapters in MP & HP gage
accessories.)
Agency Approval: RoHS. Note: -SP
models not RoHS approved.

A-605B Air Filter Gage Accessory Kit, Air filter kit with two plastic open/close
valves, two 4˝ steel static tips, plastic tubing and mounting flange

A-605C Air Filter Gage Accessory Kit, Air filter kit with two plastic open/close
valves, two plastic static tips, plastic tubing and mounting flange

4

DWYER INSTRUMENTS, INC. | www.dwyer-inst.com

Model A-605 Air Filter Gage Accessory Kit

Adapts any standard Magnehelic
an air filter 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 fittings on both tips and valves.

®

gage for use as

Flush, Surface, Integrated Plate or Pipe Mounted

Enclosure Mounted

uSee page 7 (Magnehelic®Gage Mounting Accessories)

vOver Protection Note: See page 5 (Series 2000)

Series

2000

ezel provides flange for flush mounting in panel.

B

lear plastic face is highly resistant to breakage. Provides

C

ndistorted viewing of pointer and scale.

u

recision litho-printed scale is accurate and easy to read.

P

alibrated range spring is flat spring steel. Small amplitude

C

f motion assures consistency and long life. It reacts to

o

ressure on diaphragm. Live length adjustable for calibration.

p

ed tipped pointer of heat treated aluminum tubing is easy

R

o see. It is rigidly mounted on the helix shaft.

t

ointer stops of molded rubber prevent pointerover-travel

P

ithout damage.

w

Wishbone” assembly provides mounting for helix, helix

“

earings and pointer shaft.

b

eweled bearings are shock-resistant mounted;provide

J

irtually friction-free motion for helix. Motion damped with

v

igh viscosity silicone fluid.

h

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.

Zero adjustment screw is conveniently located in the plastic
cover, and is accessible without removing cover.
O-ring seal provides pressure tightness.

Magnehelic®Gage Models & Ranges

-ring seal for cover assures pressure integrity of case.

O

VERPRESSURE PROTECTION

O

lowout plug is comprised of a rubber plug on the rear which

B

unctions as a relief valve by unseating and venting the gage

f

nterior when over pressure reaches approximately 25 psig

i

1.7 bar). To provide a free path for pressure relief, there are

(

our spacer pads which maintain 0.023˝ clearance when gage

f

s surface mounted. Do not obstruct the gap created by these

i

ads.

p

he blowout plug is not used on models above 180˝ of water

T

ressure, medium or high pressure models, or on gages

p

hich require an elastomer other than silicone for the

w

iaphragm.

d

he blowout plug should not be used as a system

T

verpressure control. High supply pressures may still cause

o

he gage to fail due to over pressurization, resulting in

t

roperty damage or serious injury. Good engineering

p

ractices should be utilized to prevent your system from

p

xceeding the ratings or any component.

e

ie cast aluminum case is precision made and iridite-dipped

D

o withstand 168 hour salt spray corrosion test. Exterior

t

inished in baked dark gray hammerloid. One case size is

f
used for all standard pressure options, and for both surface
and flush mounting.

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.

Samarium Cobalt magnet mounted at one end of range spring
rotates helix without mechanical linkages.

PRESSURE

Differential Pressure Gages

*
*

Range Inches
of Water

.05-0-.2
0-.25
0-.50
0-1.0
0-2.0
0-3.0
0-4.0
0-5.0
0-6.0
0-8.0
0-10
0-12
0-15
0-20
0-25
0-30
0-40
0-50
0-60
0-80
0-100
0-120
0-150
0-160
0-180
0-250

0.125-0-0.125
.25-0-.25
.5-0-.5
1-0-1
2-0-2
5-0-5
10-0-10
15-0-15

Model
2201
2202
2203
2204
2205
2210*
2215*
2220*
2230**

Model
2000-15CM
2000-20CM
2000-25CM
2000-50CM
2000-80CM
2000-100CM
2000-150CM
2000-200CM
2000-250CM
2000-300CM

Zero Center Ranges

2300-4CM
2300-10CM
2300-30CM

†These ranges calibrated
for vertical scale position.

• Accuracy +/-3%

• • Accuracy +/-4%
*MP option standard

**HP option standard

Model
2000-00N†••
2000-00†••
2000-0†•
2001
2002
2003
2004
2005
2006
2008
2010
2012
2015
2020
2025
2030
2040
2050
2060
2080
2100
2120
2150
2160
2180
2250

Zero Center Ranges

2300-00†••
2300-0†•
2301
2302
2304
2310
2320
2330

VELOCITY AND VOLUMETRIC FLOW UNITS

Scales are available on the Magnehelic®that read in velocity units (FPM, m/s) or
volumetric flow units (SCFM, m3/s, m3/h). Stocked velocity units with dual range
scales in inches w.c. and feet per minute are shown above. For other ranges contact
the factory.
When ordering volumetric flow scales please specify the maximum flow rate and its
corresponding pressure. Example: 0.5 in w.c. = 16,000 CFM.

Range
PSI

0-1
0-2
0-3
0-4
0-5
0-10
0-15
0-20
0-30

Range,
CM of
Water

0-15
0-20
0-25
0-50
0-80
0-100
0-150
0-200
0-250
0-300

2-0-2
5-0-5
15-0-15

Model
2000-6MM†••
2000-10MM†•
2000-15MM
2000-25MM
2000-30MM
2000-50MM
2000-80MM
2000-100MM
2000-125MM
2000-150MM
2000-200MM
2000-250MM
2000-300MM

Zero Center Ranges
2300-6MM†••

2300-10MM†•
2300-20MM†•

Model
2000-60NPA†••
2000-60PA†••
2000-100PA†•
2000-125PA†•
2000-250PA
2000-300PA
2000-500PA
2000-750PA
2000-1000PA

Zero Center Ranges
Model

2300-60PA†••
2300-100PA†•
2300-120PA
2300-200PA
2300-250PA
2300-300PA
2300-500PA
2300-1000PA

CONTACT US | U.S. 219/879-8000 | U.K. (+44) (0)1494-461707 | A.U. (+61) (0) 2 4272 2055 | China [phone]

Range MM
of Water

0-6
0-10
0-15
0-25
0-30
0-50
0-80
0-100
0-125
0-150
0-200
0-250
0-300

3-0-3
5-0-5
10-0-10

Range, Pa

10-0-50
0-60
0-100
0-125
0-250
0-300
0-500
0-750
0-1000

Range, Pa

30-0-30
50-0-50
60-0-60
100-0-100
125-0-125
150-0-150
250-0-250
500-0-500

ACCESSORIES
A-321, Safety Relief Valve
A-448, 3-piece magnet kit for mounting Magnehelic

surface

A-135, Rubber gasket for panel mounting
A-401, Plastic Carry Case

Model
2000-0.5KPA
2000-1KPA
2000-1.5KPA
2000-2KPA
2000-2.5KPA
2000-3KPA
2000-4KPA
2000-5KPA
2000-8KPA
2000-10KPA
2000-15KPA
2000-20KPA
2000-25KPA
2000-30KPA

Zero Center Ranges
2300-1KPA
2300-2KPA
2300-2.5KPA
2300-3KPA

Dual Scale English/Metric Models

Model
2000-00D†••
2000-0D†•
2001D
2002D
2003D
2004D
2005D
2006D
2008D
2010D
2015D
2020D
2025D
2050D
2060D

Range,
kPa

0-0.5
0-1
0-1.5
0-2
0-2.5
0-3
0-4
0-5
0-8
0-10
0-15
0-20
0-25
0-30

.5-0-.5
1-0-1

1.25-0-1.25

1.5-0-1.5

Range,
in w.c.

0-.25
0-0.5
0-1.0
0-2.0
0-3.0
0-4.0
0-5.0
0-6.0
0-8.0
0-10
0-15
0-20
0-25
0-50
0-60

A-310A 3-Way 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 Dwyer
A-310A vent valves to connect gage. Pressure can then be
removed to check or re-zero the gage.

Dual Scale Air Velocity Units

For use with pitot tube

Model
2000-00AV†••

2000-0AV†•

2001AV

2002AV

2005AV

2010AV

Range,
Pa or kPa

0-62 Pa
0-125 Pa
0-250 Pa
0-500 Pa
0-750 Pa
0-1.0 kPa
0-1.25 kPa
0-1.5 kPa
0-2.0 kPa
0-2.5 kPa
0-3.7 kPa
0-5 kPa
0-6.2 kPa
0-12.4 kPa
0-15 kPa

Range in
W.C./
Velocity
F.P.M.

0-.25/
300-2000
0-.50/
500-2800
0-1.0/
500-4000
0-2.0/
1000-5600
0-5.0/
2000-8800
0-10/
2000-12500

®

gage directly to magnetic

5