Marsh GAS TEST GAUGE Catalog Page

HVAC/R

SPECIFICATIONS

ACCURACY

ASME Grade ±3/2/3%(±2% of
range across middle half of scale)

CASE SIZES

2" diameter

CASE MATERIAL

Steel, black painted

MOUNTING STYLE

Reducing Bell or Hex Style

HOUSING MATERIAL

Reducing Bell: Iron, black painted
Hex Body: Steel, Zinc Dichromate
Plated

TUBE & SOCKET

Copper alloy

MOVEMENT

Brass
CONNECTION

3

⁄4" FPT

RANGES

15 to 100 psi

DIAL STANDARD

Single Scale psi

OLOR

AL C

DI

Black markings on white

POINTER

Aluminum, black painted

WINDO

Polycarbonate

WEIGHT 0.5 lb.

W

GAS TEST GAUGE

Hex or Bell Type mounting

•

• 15 to100 Psi pressure ranges

• Steel case and brass internals

Use to pressure test all new gas installations for leaks and passing inspection codes. After installing Gas Test
Gauge, the system is pressurized with air. Any leakage will be indicated by a pressure drop on the gauge.

Typical applications include testing of gas and other pressure media.

STANDARD RANGES & PART NUMBERS

TYPE GAS TEST GAUGES

Size 2"
Case Material Steel
Internals Copper Alloy
Connection
Scale Standard psi
Mounting style Bell Type Hex Type
0 to 15 psi G33522 G33526
0 to 30 psi G33523 G33527
0 to 60 psi G33524 G33528
0 to 100 psi G33525 G33529

3

⁄4" FPT

40

SERVICEMAN’S TEST GAUGE

2.1 [53.7]

2.76 [70.0]

.37 [9.4]

1.27 [32.2]

9/16 HEX

[14.0 HEX]

1/8 NPT

BLACK POINTER

DIAL, WHITE WITH RED
AND BLACK CHARACTERS

RECALIBRATOR

MARSH

BELLOFRAM

Gauges • Thermometers • Needle Valves

Instrument
Company

Marsh

Recalibrator and Restrictor Standard

•

• Heavy Duty Brass Case

• Clam Shell Packaging Optional

Marsh Instruments Deluxe Serviceman’s Test Gauge is designed to assure the modern serviceman the best possible
gauge for testing refrigeration equipment. Corresponding, easy-to-read temperature scales are printed in red on the
inner arcs of the dial face.

Typical applications include testing, servicing and recharging AC and R systems.

STANDARD RANGES & PART NUMBERS

TYPE SERVICEMAN’S TEST GAUGES

Size 21⁄2"

Case Material Brass

Internals Copper Alloy

Mounting/Case Style LM

Connection

Scale Standard psi & temperature (ºF)

30" X 350 psi W0070 R-12, 22, 502 Carton

30" X 350 psi W0070Q R-12, 22, 502 Clam Shell

0 to 500 psi W0072 R-12, 22, 502 Carton

0 to 500 psi W0072Q R-12, 22, 502 Clam Shell

Set of (2) W0070 & W0072 W0074 R-12, 22, 502 Carton Only

30" X 350 psi W8070

30" X 350 psi W8070Q R-134a, 404A, 507 Clam Shell

0 to 500 psi W8072 R-134a, 404A, 507 Carton

0 to 500 psi W8072Q R-134a, 404A, 507 Clam Shell

30” x 500 psi W8115 R-22, 407C, 410A Carton

30” x 500 psi W8115Q R-22, 407C, 410A Clam Shell

0 to 800 psi W8127 R-22, 407C, 410A Carton

0 to 800 psi W8127Q R-22, 407C, 410A Clam Shell

1

⁄8 NPT

R-134a, 404A, 507 Carton

HVAC/R

SPECIFICATIONS

ACCURACY

ASME Grade B - ±3/2/3% (±2% of
range across middle half of scale)

CASE SIZE

21⁄2" diameter

CASE MATERIAL

Polished brass

CASE STYLE

LM – Lower Mount

TUBE & SOCKET

Copper Alloy

MOVEMENT

Brass with recalibrator

CONNECTION

1

⁄8 NPT with Restrictor Standard

RANGES

0-500 psi, 30" Hg VAC to 120 psi
retarded to 350 psi

DIAL STANDARD

psi with corresponding temperature
scales

DIAL COLOR

Black markings on white with red
or blue temperature scales

OINTER

P

Aluminum, black painted

WINDOW

Beveled glass

RECALIBRATOR

Standard

WEIGHT 5 lb.

ALL DIMENSIONS ARE NOMINAL

41

HVAC/R Gauges

160

150

140

130

120

11

0

100

90

8

0

7

0

60

50

40

20

0

-40

60

8

0

1

00

120

140

160

40

20

0

160

150

120

90

60

30

0

T

A

D

J

S

U

Free

Vibration

R410

A

R-407C

R-2

2

800

700

600

500

400

300

200

100

0

psi

-40

?F

2.13 [54.0]

2.83 [72.0]

.42 [10.7]

1.21 [30.7]

9/16 HEX

[14.0 HEX]

1/8 NPT

BLACK POINTER

DIAL, BLACK WITH WHITE CHARACTERS
EXCEPT LIGHT GREEN R-22 SCALE, BROWN
R-407C SCALE, & ROSE R-410A SCALE

RECALIBRATOR

MARSH

BELLOFRAM

Gauges ï Thermometers ï Needle Valves

I

nstrument
C

ompany

M

arsh

SPECIFICATIONS

ACCURACY

ASME Grade B - ±3/2/3% (2% of
range across middle half of scale)

CASE SIZE: 2
CASE MATERIAL

Steel or plastic, red or blue

TUBE & SOCKET

Copper alloy

MOVEMENT

Brass with recalibrator

CONNECTION

1

⁄8 NPT with Restrictor Standard

RANGES

0-500 psi, 30" Hg VAC to 120 psi
retarded to 350 psi

DIAL STANDARD

psi with corresponding temperature
scales

DIAL COLOR

Black markings on white with red
or blue temperature scales

POINTER

Aluminum, black painted

WINDO

Impact resistant plastic

RECALIBRATOR

Standard

WEIGHT 0.5 lb

1

W

⁄2" diameter

MANIFOLD GAUGE

Recalibrator and Restrictor Standard

•

• Color Coded Cases, “Reds” & “Blues”

• Overpressure Protection to 350 psi

These gauges are designed for the pressure measurement of refrigeration systems. All dials are furnished with
corresponding temperature scales for the various refrigerants. Dials feature R-12, R-22, and R-502. Standard

onnections are

c
Marsh Manifold Gauges are used in refrigeration applications for testing, servicing, and recharging AC and R

Systems.

STANDARD RANGES & PART NUMBERS

TYPE MANIFOLD GAUGES

Size 21⁄2"
Case Material Steel
Internals Copper Alloy
Mounting/Case Style LM
Connection
Scale Standard psi & temperature (ºF)
30" X 350 psi W0011 R-12, 22, 502 Blue Case Carton
30" X 350 psi W0011Q R-12, 22, 502 Blue Case Clam Shell
0 to 500 psi W0023 R-12, 22, 502 Red Case Carton
0 to 500 psi W0023Q R-12, 22, 502 Red Case Clam Shell
30” X 350 psi W8011 R-134a, 404A & 507 Blue Case Carton
30” X 350 psi W8011Q R-134a, 404A & 507 Blue Case Clam Shell
0 to 500 psi W8023 R-134a, 404A & 507 Red Case Carton
0 to 500 psi W8023Q R-134a, 404A & 507 Red Case Clam Shell
30” X 500 psi W8015 R-22, 407C & 410A Blue Case Carton
30” X 500 psi W8015Q R-22, 407C & 410A Blue Case Clam Shell
0 to 800 psi W8027 R-22, 407C & 410A Red Case Carton
0 to 800 psi W8027Q R-22, 407C & 410A Red Case Clam Shell
30” X 350 psi J7622PQ-001 R-12, 22, 502 S/S Case Clam Shell Liquid Filled

0 to 500 psi J7662PQ-001 R-12, 22, 502 S/S Case Clam Shell Liquid Filled
30" X 350 psi J7622PQ-002 R-134a, 404A & 507 S/S Case Clam Shell Liquid Filled
0 to 500 psi J7662PQ-002 R-134a, 404A & 507 S/S Case Clam Shell Liquid Filled

1

PT lower mount with your choice of red or blue case.

⁄8 N

1

⁄8 NPT

ALL DIMENSIONS ARE NOMINAL

42

REFRIGERATION AMMONIA GAUGE

2.2 [55.6]

2.66 [67.5]

.37 [9.4]

.95 [24.1]

PRESSURE RELIEF PLUG

9/16 HEX

[14.0 HEX]

1/4 NPT

BLACK POINTER

DIAL, BLACK WITH WHITE CHARACTERS

MARSH

BELLOFRAM

Gauges ï Thermometers ï Needle Valves

Instrument
Company

Marsh

2.79 [70.9]

9/16 HEX

[14.0 HEX]

1/4 NPT

.34 [8.7]

3.9

[99.1]

PRESSURE RELIEF PLUG

.25 [6.4]

.95 [24.2]

BLACK POINTER

DIAL, WHITE WITH BLACK CHARACTERS EXCEPT
RED AMMONIA SCALE

Range 30" Hg to 150 psi or 300 psi

•

• Case Sizes: 63mm and 31⁄2"

• ASME Grade B

Marsh Ammonia Gauges include a restrictor that protects the gauge against sudden shock or pulsating pressure. The
inner dial arc shows pressure, outer arc shows the corresponding temperature scale. Marsh Refrigeration Ammonia
Gauges are available in a stainless steel case.

Marsh Instruments Refrigeration Ammonia Gauges are designed for use on ammonia compressors and other ammonia
refrigeration equipment.

TANDARD RANGES & PART NUMBERS

S

TYPE REFRIGERATION AMMONIA GAUGES

Size 63mm 31⁄2"
Case Material Stainless Steel Stainless Steel
Internals Stainless Steel Stainless Steel
Mounting / Case Style LM LM
Scale Standard psi & Ammonia (ºF) psi & Ammonia (ºF)
Connection
30" Hg VAC to 150 psi W0104 W0112
30" Hg VAC to 150 psi W0104Q
30" Hg VAC to 300 psi W0108 W0116
30" Hg VAC to 300 psi W0108Q

NOTE:

REFRIGERATION AMMONIA GAUGE OPTIONS

OPTION TYPE SUFFIX

Fill Medium

Custom Dials Logo or Custom face M Consult factory for colors and minimums

ALL DIMENSIONS ARE NOMINAL

1

⁄4 NPT

Items are available on special order. However, minimums and lead times apply. Consult factory.

1

⁄4 NPT

Glycerine (GL) P All Models
Silicone (SL) PI All Models

63MM 3

1

⁄2"

HVAC/R Gauges

SPECIFICATIONS

ACCURACY

ASME Grade B – ±3/2/3% (±2% of
range across middle half of scale)

CASE SIZES

63mm and 31⁄2" diameter

CASE MATERIAL

304 Stainless steel

CASE STYLE

LM – Lower Mount

TUBE & SOCKET Stainless steel
MOVEMENT Brass

CONNECTION 1⁄4 NPT

RANGES

Compound 30" Hg Vac to 150 psi
or 30" Hg Vac to 300 psi

DIAL STANDARD

Single scale psi with corresponding
Ammonia temperature scales

DIAL COLOR

Black markings on white

POINTER

Aluminum, black painted

WINDOW Polycarbonate
RESTRICTORS Standard
PACKAGING

Optional clam shell packed gauges
are on 41⁄2" X 65⁄8" cards, pre­punched for pegboard hanging

WEIGHT

63 mm 0.5 lb.
31⁄2" 1.0 lb.

43

HVAC/R Gauges

BLACK ADJUSTAB LE POINTER

DIAL, WHITE WITH
BLACK CHARACTERS

2.77

1.25

9/16 SQUARE

1/8 NPT

2.1

.4

DIAL, WHITE WITH
BLACK CHARACTERS

BLACK ADJUSTAB LE POINTER

3.72

2.78

.38

9/16 SQUARE

1/4 NPT

1.3

SPECIFICATIONS

ACCURACY

ASME Grade B – ±3/2/3% (2% of
range across middle half of scale)

CASE SIZES

21⁄2" and 31⁄2" diameter

CASE MATERIAL

Steel, black painted

CASE STYLE LM – Lower Mount
TUBE & SOCKET Copper alloy
MOVEMENT Brass
CONNECTION

1

⁄8 or 1⁄4 NPT

RANGES

Compound 30" Hg Vac to 150 psi,
30" Hg Vac to 300 psi, 0 to 300 psi

DIAL STANDARD

psi with corresponding temperature
scales

DIAL COLOR

Black markings on white with red
temperature scales

POINTER

Aluminum, black painted,
adjustable

WINDOW Acrylic Clearlok
RESTRICTORS Standard
OPTIONS Consult factory
WEIGHT 0.5 lb

REFRIGERATION GAUGE

Color Coded Dial

•

• Adjustable Pointer Standard

Marsh Refrigeration Gauges are sturdily constructed and tested to give long, continuous, accurate service. In
addition to the standard pressure or compound scale, dials also show the corresponding temperature scales for R-12,
R-22, and R-502, in the various combinations shown in the chart below. Dial markings are sharp, clear and easy to read.

Marsh Instruments Refrigeration Gauges are designed specifically for use on refrigeration systems.

STANDARD RANGES & PART NUMBERS

TYPE REFRIGERATION GAUGES

Size 21⁄2" 31⁄2"
Case Material Steel
Internals Copper Alloy
Mounting/Case Style LM LM
Connection
Scale Standard psi and temperature (ºF)

R-12
30" Hg VAC 150 psi W0002 W0030
0 to 300 psi W0016 W0034

R-22
30" Hg VAC to 150 psi W0032

R-12 & R-22
30" Hg VAC 150 psi W0004
30" Hg VAC 300 psi W0012
0 to 300 psi W0018

NOTE: Items are available on special order. However, minimums and lead times apply. Consult factory.

1

⁄8 NPT

1

⁄4 NPT

44

1

2

⁄2" 31⁄2"

ALL DIMENSIONS ARE NOMINAL

CONTRACTOR’S GAUGE

DIAL, WHITE WITH
BLACK CHARACTERS

4.8

1.26

9/16 SQUARE

1/4 NPT

ADJUSTAB LE BLACK POINTER

3.48

.38

•41⁄2" Dial

• Polished Stainless Steel Case

• Adjustable Pointer

• 1% Accuracy

Marsh Instruments Contractor’s HVAC Service Gauge is a newly redesigned gauge with a long-life movement to meet
the needs of contractors in air conditioning, heating, plumbing and refrigeration. This rugged and reliable gauge is
economically priced and offers many features normally found on more expensive gauges such as adjustable pointer,
acrylic lens and polished stainless steel case.

Marsh Instruments Contractor’s Gauges are designed for use on plumbing and HVAC equipment.

HVAC/R Gauges

STANDARD RANGES & PART NUMBERS

TYPE CONTRACTOR’S GAUGES

Size 41⁄2"
Case Material Polished Stainless Steel
Internals Copper Alloy
Mounting / Case Style LM
Connection
Scale Standard psi
30" Hg VAC to 30 psi W0480
30" Hg VAC to 160 psi W0487
0 to 30 psi W0481
0 to 60 psi W0483
0 to 100 psi W0484
0 to 160 psi W0486
0 to 200 psi W0488
0 to 300 psi W0490
0 to 600 psi W0492

1

⁄4 NPT

CONTRACTOR’S GAUGE OPTIONS

OPTION TYPE SUFFIX AVAILABLE ON MODELS

Restrictors Push Fit .008 or .018 H all models

Catalog dials psi and kPa W3 all models

All other dials - consult factory for lead time 25 Piece minimum

SPECIFICATIONS

ACCURACY

ASME Grade A – ±2/1/2% (1% of
range across middle half of scale)

CASE SIZE

41⁄2" diameter

CASE MATERIAL

Polished stainless steel

CASE STYLE

LM – Lower Mount

TUBE & SOCKET

Copper alloy

MOVEMENT

Brass sector and pinion

CONNECTION

1

⁄4 NPT

RANGES

Compound 30" Hg Vac to160 psi;
30 to 600 psi

DIAL STANDARD

Single scale psi

DIAL COLOR

Black markings on white

POINTER

Aluminum, black painted

WINDOW

Acrylic

WEIGHT 1.0 lb

ALL DIMENSIONS ARE NOMINAL

45

HVAC/R Gauges

BLACK POINTER

DIAL, WHITE WITH
BLACK CHARACTERS

RED MARKING POINTER

1.1

3.7

2.75

.4

9/16 SQUARE

1/4 NPT

BLACK MICROMETER POINTER

.23 DIA THRU, 3 HOLES EQUALLY
SPAC ED ON A 5.375 DIA BC

DIAL, WHITE WITH

BLACK CHARACTERS

4.92

2.87

4.28

1.5

3/4 ACROSS

1/4 NPT

WRENCH FLATS

SPECIFICATIONS

ACCURACY

31⁄2" ASME Grade B – ±3/2/3%
(2% of range across middle half of
scale)

1

⁄2" ASME Grade A – ±2/1/2%

4
(1% of range across middle half of
scale)

CASE SIZE 3
CASE MATERIAL

31⁄2": Steel, black painted
41⁄2": Aluminum back flange case,
black painted

CASE STYLE LM – Lower Mount
TUBE & SOCKET Copper alloy
MOVEMENT

31⁄2": Brass
41⁄2": Stainless steel

CONNECTION
RANGES

Dual Scale 15 to 300 psi and 300
to 690 ft. H20

DIAL STANDARD

psi, ft. H2O and metric

DIAL COLOR

Black markings on white

POINTER

Aluminum, black painted with red
set hand

WINDOW

31⁄2": Acrylic Clearlok
41⁄2": Instrument Glass

WEIGHT

31⁄2" 2.0 lb.
41⁄2" 2.0 lb.

1

⁄2" and 41⁄2" diameter

1

⁄4 NPT

HEATING SYSTEM GAUGE

Adjustable Set Hand

•

• Ranges to 300 psi and 690 Feet of Water

1

• 3

⁄2" and 41⁄2" Dials

1

Marsh Instruments Heating System Gauges are available in 3
adjustable red altitude pointer is standard on feet-of-water gauges. This feature allows the user to indicate the head

f water to be maintained in the system.

o
Marsh Instruments Heating System Gauges provide accurate psi and feet-of-water measurements in elevated tanks,

reservoirs, standpipes, and similar applications where reliability and dependability are crucial in heating system
equipment.

STANDARD RANGES & PART NUMBERS

TYPE HEATING SYSTEM HVAC/R GAUGES

Size 31⁄2" 41⁄2"

Case Material Steel Aluminum

Internals Copper Alloy Copper Alloy

Mounting / Case Style LM LM

Connection

Scale Standards psi, ft. H

1

⁄4 NPT

0 and metric

2

0 to 15 psi and 0 to 30 ft H20 W0456

0 to 30 psi and 0 to 70 ft H20 W0450 W0457

0 to 100 psi and 0 to 230 ft H20 W0451 W0458

0 to 150 psi and 0 to 345 ft H20 W0459

0 to 160 psi and 0 to 370 ft H20 W0452

0 to 200 psi and 0 to 460 ft H20 W0453 W0460

0 to 300 psi and 0 to 690 ft H20 W0454 W0461

NOTE: Items are available on special order. However, minimums and lead times apply. Consult factory.

HEATING SYSTEM GAUGE OPTIONS

OPTION TYPE SUFFIX AVAILABLE ON MODELS

Restrictors Special Restrictor H All models

Custom Dials Logo or Custom face M Consult factory for colors and minimums

1

3

⁄2" Steel 41⁄2" Aluminum

⁄2" and 41⁄2" dial sizes in the most popular ranges. An

1

⁄4 NPT

psi, ft. H

0 and metric

2

ALL DIMENSIONS ARE NOMINAL

46