Compound Dial Gauges | McMaster-Carr

	Connection Location Connection Location


Bottom	Center Back	Lower Back

	Pipe Size Pipe Size

1/8

1/4

1/2

	Thread Type Thread Type

NPT

BSPP

NPTF

	Measures Measures

Pressure

Vacuum

Temperature

	Scale Scale

	Dial Diameter Dial Diameter

	Dial Type Dial Type


Dry	Liquid Filled

	Scale Type Scale Type


Dual	Single

	For Use With For Use With

	Case Material Case Material

	Connection Material Connection Material

Brass

Stainless Steel

Steel

	Maximum Process Temperature Maximum Process Temperature

	Lens Material Lens Material

Plastic

Glass

Rubber

	Accuracy Grade Accuracy Grade

Not Graded

	Accuracy Scale Accuracy Scale

Mid Scale

Full Scale

	Maximum Environment Temperature Maximum Environment Temperature

	Minimum Process Temperature Minimum Process Temperature

	Minimum Environment Temperature Minimum Environment Temperature

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Maximum Pressure, psi Maximum Pressure, psi

	Graduation Marks, psi Graduation Marks, psi

	Numeric Increments, psi Numeric Increments, psi

	Numeric Increments, in. of Hg Numeric Increments, in. of Hg

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40 Products

About Pressure Gauges

About Pipe Size

Dual Scale With Bottom Connection

Dual Scale With Center Back Connection

Dual Scale With Lower Back Connection

Single Scale With Bottom Connection

Single Scale With Center Back Connection

Single Scale With Center
Back Connection
(Panel Mount)

Bottom Connection

Center Back Connection

Center Back Connection (Panel Mount)

Lower Back Connection

Designed for harsh environments prone to vibration, these gauges pair a corrosion-resistant 304 stainless steel case with a glycerin-filled dial that reduces needle flutter. Also known as compound gauges, they measure both pressure and vacuum. Use them with pumps, filters, regulators, compressors, and in suction and process lines.

For technical drawings and 3-D models, click on a part number.

304 Stainless Steel Case with Brass Connection—Dual Scale (psi/in. of Hg, kPa)

For Use With: Air and Water
Accuracy: ±1% Mid Scale (Grade A); except
4" Dial Dia.: ±1% Full Scale (Grade 1A)

Available Pressure Ranges
Pressure Range		Vacuum Range		Graduation Marks			Numeric Increments
psi	kPa	in. of Hg	kPa	psi	in. of Hg	kPa	psi	in. of Hg	kPa
1 1/2" Dial Diameter
0 to 15	0 to 100	30 to 0	-100 to 0	1	1	5	5	10	50
0 to 15	0 to 100	30 to 0	-100 to 0	0.5	1	5	5	10	50
0 to 30	0 to 200	30 to 0	-100 to 0	1	2	5	10	10	50
0 to 30	0 to 200	30 to 0	-100 to 0	1	1	5	10	10	50
0 to 60	0 to 400	30 to 0	-100 to 0	2	2	10	20	30	100
0 to 60	0 to 400	30 to 0	-100 to 0	1	2	10	10	10	100
0 to 100	0 to 700	30 to 0	-100 to 0	2	5	20	20	30	100
0 to 100	0 to 700	30 to 0	-100 to 0	2	6	10	20	30	100
0 to 150	0 to 1,000	30 to 0	-100 to 0	2	5	20	20	30	200
0 to 150	0 to 1,000	30 to 0	-100 to 0	2	7.5	20	30	30	200
0 to 300	0 to 2,000	30 to 0	-100 to 0	5	15	50	50	30	500
2 1/2" Dial Diameter
0 to 15	0 to 100	30 to 0	-100 to 0	0.5	1	5	5	10	50
0 to 30	0 to 200	30 to 0	-100 to 0	1	2	5	10	10	50
0 to 60	0 to 400	30 to 0	-100 to 0	2	2	10	20	30	100
0 to 100	0 to 680	30 to 0	-100 to 0	2	5	10	20	30	200
0 to 160	0 to 1,100	30 to 0	-100 to 0	5	10	20	40	30	200
0 to 200	0 to 1,350	30 to 0	-100 to 0	5	10	50	50	30	200
0 to 300	0 to 2,050	30 to 0	-100 to 0	5	10	50	50	30	500
4" Dial Diameter
0 to 15	0 to 100	30 to 0	-100 to 0	0.5	1	2	3	5	20
0 to 30	0 to 205	30 to 0	-100 to 0	0.5	1	5	5	10	50
0 to 60	0 to 410	30 to 0	-100 to 0	2	2	10	10	10	100
0 to 100	0 to 680	30 to 0	-100 to 0	2	5	10	10	30	100
0 to 160	0 to 1,100	30 to 0	-100 to 0	5	5	20	20	30	100
0 to 200	0 to 1,360	30 to 0	-100 to 0	5	5	20	20	30	200
0 to 300	0 to 2,050	30 to 0	-100 to 0	5	10	50	50	30	500

					Bottom Connection		Center Back Connection		Lower Back Connection
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Liquid Type		Each		Each		Each
NPT Male
1 1/2"	1/8	35° to 140°	35° to 140°	Glycerin	00000000	000000	00000000	000000	000000	00
2 1/2"	1/4	35° to 140°	35° to 140°	Glycerin	0000000	00000	0000000	00000	000000	00
4"	1/4	35° to 140°	35° to 140°	Glycerin	00000000	00000	000000	00	00000000	000000
NPT Male with Calibration Certificate Traceable to NIST
2 1/2"	1/4	35° to 140°	35° to 140°	Glycerin	00000000	000000	00000000	000000	000000	00
4"	1/4	35° to 140°	35° to 140°	Glycerin	00000000	000000	000000	00	00000000	000000

304 Stainless Steel Case with 316 Stainless Steel Connection—Single Scale (psi/in. of Hg)

For Use With: Air and Water
Accuracy: ±1.5% Full Scale (Not Graded); except
4" Dial Dia.: ±1% Full Scale (Grade 1A)

Available Pressure and Vacuum Ranges
		Graduation Marks		Numeric Increments
Pressure Range, psi	Vacuum Range, in. of Hg	psi	in. of Hg	psi	in. of Hg
0 to 15	30 to 0	0.5	1	5	10
0 to 30	30 to 0	0.5	1	5	10
0 to 30	30 to 0	1	2	10	30
0 to 60	30 to 0	2	5	20	30
0 to 60	30 to 0	1	2	10	10
0 to 100	30 to 0	2	5	20	30
0 to 160	30 to 0	4	10	40	30
0 to 160	30 to 0	2	5	20	30
0 to 300	30 to 0	5	10	50	30

Bottom Connection

NPT Male
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Liquid Type		Each
2 1/2"	1/4	-40° to 140°	-40° to 210°	Glycerin	0000000	000000
4"	1/2	-40° to 140°	-40° to 210°	Glycerin	0000000	000000

Center Back Connection

NPT Male
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Liquid Type		Each
2 1/2"	1/4	-40° to 140°	-40° to 210°	Glycerin	0000000	0000000

Center Back Connection (Panel Mount)

NPT Male
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Liquid Type	For Panel Cutout Dia.		Each
2 1/2"	1/4	-40° to 140°	-40° to 210°	Glycerin	2 7/16"	0000000	0000000

Pressure and Vacuum Gauges

Single Scale With Bottom Connection

Single Scale With Center Back Connection

Dual Scale With Bottom Connection

Dual Scale With Center Back Connection

Dual Scale With Center
Back Connection
(Panel Mount)

Bottom Connection

Center Back Connection

Center Back Connection (Panel Mount)

Also known as compound gauges, these measure both pressure and vacuum. Use them with pumps, filters, regulators, compressors, and in suction and process lines.

Gauges with ABS plastic case are more corrosion resistant than gauges with steel case. Gauges with steel case are more impact resistant than gauges with ABS plastic case.

For technical drawings and 3-D models, click on a part number.

ABS Plastic Case with Brass Connection—Single Scale (psi/in. of Hg)

For Use With: Air
Accuracy: ±2% Mid Scale (Grade B)

Available Pressure and Vacuum Ranges
		Graduation Marks		Numeric Increments
Pressure Range, psi	Vacuum Range, in. of Hg	psi	in. of Hg	psi	in. of Hg
2 1/2" Dial Diameter
0 to 15	30 to 0	0.5	1	5	10
0 to 30	30 to 0	1	2	10	10
0 to 60	30 to 0	2	2	20	30
0 to 100	30 to 0	2	5	20	30
0 to 160	30 to 0	5	10	20	30
0 to 200	30 to 0	5	10	50	30
4" Dial Diameter
0 to 15	30 to 0	0.5	1	3	5
0 to 30	30 to 0	0.5	1	5	10
0 to 60	30 to 0	2	2	10	10
0 to 100	30 to 0	2	5	10	30
0 to 160	30 to 0	5	5	20	30
0 to 200	30 to 0	5	5	20	30

					Bottom Connection		Center Back Connection
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Case Color		Each		Each
NPT Male
2 1/2"	1/4	-40° to 140°	-40° to 140°	Black	0000000	000000	0000000	000000
4"	1/4	-40° to 140°	-40° to 140°	Black	0000000	00000	000000	00

Steel Case with Brass Connection—Dual Scale (psi/in. of Hg, kPa)

For Use With: Air
Accuracy: ±2% Mid Scale (Grade B)

Available Pressure and Vacuum Ranges
Pressure Range		Vacuum Range		Graduation Marks			Numeric Increments
psi	kPa	in. of Hg	kPa	psi	kPa	in. of Hg	psi	kPa	in. of Hg
0 to 15	0 to 100	30 to 0	-100 to 0	0.5	5	1	5	20	5
0 to 30	0 to 200	30 to 0	-100 to 0	1	5	1	5	50	5
0 to 75	0 to 500	30 to 0	-100 to 0	5	20	2	10	100	10
0 to 100	0 to 700	30 to 0	-100 to 0	2	20	5	10	100	15
0 to 160	0 to 1,100	30 to 0	-100 to 0	2	20	5	20	200	30
0 to 200	0 to 1,400	30 to 0	-100 to 0	2	50	5	20	200	30
0 to 300	0 to 2,100	30 to 0	-100 to 0	10	50	15	50	300	30

				Bottom Connection		Center Back Connection		Center Back Connection (Panel Mount)
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F		Each		Each	For Panel Cutout Dia.		Each
NPT Male
2"	1/4	-40° to 150°	-40° to 150°	0000000	000000	0000000	000000	2 7/32"	0000000	000000
2 1/2"	1/4	-40° to 150°	-40° to 150°	0000000	00000	0000000	00000	2 3/4"	0000000	00000
3 1/2"	1/4	-40° to 150°	-40° to 150°	0000000	00000	0000000	00000	3 13/16"	0000000	00000
4 1/2"	1/4	-40° to 150°	-40° to 150°	0000000	00000	000000	00	__	000000	00

Corrosion-Resistant Pressure and Vacuum Gauges

Bottom Connection

Center Back Connection

Center Back Connection (Panel Mount)

Bottom Connection

Center Back Connection

Center Back Connection (Panel Mount)

A 304 stainless steel case coupled with 316 stainless steel connection threads provide protection from corrosive environments. Also known as compound gauges, these measure both pressure and vacuum. Use them with pumps, filters, regulators, compressors, and in suction and process lines.

For technical drawings and 3-D models, click on a part number.

304 Stainless Steel Case with 316 Stainless Steel Connection—Single Scale (psi/in. of Hg)

For Use With: Air
Accuracy: ±1.5% Full Scale (Not Graded); except
Acrylic Plastic Lens: ±0.5% Full Scale (Grade 2A)
Glass Lens: ±1% Full Scale (Grade 1A)

		Available Pressure and Vacuum Ranges
		Nylon Plastic Lens				Acrylic Plastic Lens				Glass Lens
		Graduation Marks		Numeric Increments		Graduation Marks		Numeric Increments		Graduation Marks		Numeric Increments
Pressure Range, psi	Vacuum Range, in. of Hg	psi	in. of Hg	psi	in. of Hg	psi	in. of Hg	psi	in. of Hg	psi	in. of Hg	psi	in. of Hg
0 to 15	30 to 0	0.5	1	5	10	0.2	0.5	2	5	0.5	1	5	10
0 to 30	30 to 0	1	2	10	30	0.5	1	5	10	0.5	1	5	10
0 to 60	30 to 0	2	5	20	30	1	2	10	10	1	2	10	10
0 to 100	30 to 0	2	5	20	30	1	2	10	30	2	5	20	30
0 to 160	30 to 0	4	10	40	30	__	__	__	__	2	5	20	30
0 to 300	30 to 0	5	10	50	30	2	5	50	30	5	10	50	30

Bottom Connection

NPT Male
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Lens Material		Each
2 1/2"	1/4	-40° to 140°	-40° to 210°	Nylon Plastic	0000000	000000
3"	1/4	-40° to 140°	-20° to 210°	Acrylic Plastic	000000	000000
4"	1/2	-40° to 140°	-40° to 210°	Glass	0000000	000000

Center Back Connection

NPT Male
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Lens Material		Each
2 1/2"	1/4	-40° to 140°	-40° to 210°	Nylon Plastic	0000000	000000

Center Back Connection (Panel Mount)

NPT Male
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Lens Material	For Panel Cutout Dia.		Each
2 1/2"	1/4	-40° to 140°	-40° to 210°	Nylon Plastic	2 7/16"	0000000	0000000

Vibration-Resistant Pressure and Vacuum Gauges

Bottom Connection

Center Back Connection

Bottom Connection

Center Back Connection

A glycerin-filled dial reduces needle flutter for precise readings in high-vibration applications. Also known as compound gauges, these measure both pressure and vacuum. Use them with pumps, filters, regulators, compressors, and in suction and process lines.

For technical drawings and 3-D models, click on a part number.

ABS Plastic Case with Brass Connection—Dual Scale (psi/in. of Hg, kPa)

For Use With: Air
Accuracy: ±1.5% Full Scale (Not Graded)

Available Pressure and Vacuum Ranges
Pressure Range		Vacuum Range		Graduation Marks			Numeric Increments
psi	kPa	in. of Hg	kPa	psi	in. of Hg	kPa	psi	in. of Hg	kPa
0 to 15	0 to 100	30 to 0	-100 to 0	0.5	1	5	5	10	50
0 to 30	0 to 200	30 to 0	-100 to 0	1	2	10	10	30	100
0 to 60	0 to 400	30 to 0	-100 to 0	2	5	20	20	30	200
0 to 100	0 to 680	30 to 0	-100 to 0	2	5	20	20	30	200

						Bottom Connection		Center Back Connection
Dial Dia.	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Case Color	Liquid Type		Each		Each
NPT Male
2 1/2"	1/4	0° to 140°	0° to 140°	Black	Glycerin	00000000	000000	00000000	000000

Refrigeration Pressure and Vacuum Gauges

Bottom Connection

Often used with chillers and in refrigeration systems, these gauges display the temperature of ammonia relative to the pressure measurement. Also known as compound gauges, these measure both pressure and vacuum.

For technical drawings and 3-D models, click on a part number.

304 Stainless Steel Case with 316 Stainless Steel Connection—Dual Scale (psi/in. of Hg, Fahrenheit)

For Use With: Air, Ammonia, and Refrigerant
Accuracy: ±1.6% Full Scale (Grade B)

Available Pressure and Vacuum Ranges
		Graduation Marks		Numeric Increments
Pressure Range, psi	Vacuum Range, in. of Hg	psi	in. of Hg	psi	in. of Hg	Display Temp. Range, °F
0 to 150	30 to 0	5	5	20	30	-60° to 84°
0 to 300	30 to 0	5	5	25	30	-60° to 125°

				Bottom Connection
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F		Each
NPT Male
2 1/2"	1/4	-40° to 200°	0° to 250°	0000000	000000
4"	1/4	-40° to 200°	0° to 250°	0000000	00000

3-in-1 Pressure and Vacuum Gauges

These portable gauges have three different dials to display pressure and vacuum measurements on a low, medium, and high scale. Also known as compound gauges, they measure both pressure and vacuum in hydraulic applications.

For technical drawings and 3-D models, click on a part number.

Steel Case with Steel Connection—Dual Scale (psi, in. of Hg, cm of Hg, kg/cm²)

Bottom Connection

For Use With: Air and Hydraulic Fluid
Accuracy: ±2% Mid Scale (Grade B)

		Left Gauge				Middle Gauge		Right Gauge					Bottom Connection
Dial Diameter	Pipe Size	Pressure Range, psi	Pressure Range, kg/cm²	Vacuum Range, in. of Hg	Vacuum Range, cm of Hg	Pressure Range, psi	Pressure Range, kg/cm²	Pressure Range, psi	Pressure Range, kg/cm²	Environment Temp. Range	Process Temp. Range	Overall Dia.		Each
NPTF Male
2"	1/8	0 to 150	0 to 10	30 to 0	76 to 0	0 to 5,000	0 to 350	0 to 600	0 to 42	-40° to 120°	-40° to 190°	6 7/16"	0000000	0000000

Absolute Pressure Gauges

Bottom Connection

Unlike other gauges that measure the difference between your system and the atmosphere, these give measurements relative to zero pressure. They’re often used in laboratory applications, and they are barometrically independent.

Gauges with a Torr scale are also known as Torr gauges.

Stainless steel gauges have excellent corrosion resistance, so they can be used with more corrosive liquids and gasses than gauges with a brass connection and aluminum case.

For technical drawings and 3-D models, click on a part number.

Anodized Aluminum Case with Brass Connection—Dual Scale (mbar, Torr)

For Use With: Air
Accuracy: ±2% Full Scale (Not Graded)

Available Pressure Ranges
		Numeric Increments		Graduation Marks
Pressure Range, mbar	Pressure Range, Torr	mbar	Torr	mbar	Torr
0 to 25	0 to 20	5	2	0.5	0.2
0 to 50	0 to 40	10	10	1	1
0 to 130	0 to 100	20	20	2	2
0 to 1,000	0 to 760	200	100	20	10

					Bottom Connection
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Lens Material		Each
NPT Male
4"	1/4	5° to 120°	0° to 145°	Glass	000000	0000000

Stainless Steel Case with Stainless Steel Connection—Single Scale (mbar)

For Use With: Air, Carbon Dioxide, Diesel Fuel, Ethyl Alcohol, Gasoline, Hydraulic Fluid, Natural Gas, Water
Accuracy: ±1% Full Scale (Not Graded)

Available Pressure Ranges
Pressure Range, mbar	Numeric Increments, mbar	Graduation Marks, mbar
0 to 25	5	0.5
0 to 60	10	1
0 to 160	50	5
0 to 600	100	10
0 to 1,000	200	20

					Bottom Connection
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Lens Material		Each
BSPP Male
4"	1/2	5° to 120°	0° to 200°	Glass	000000	000000000

Vibration- and Corrosion-Resistant Vacuum Gauges

Dual Scale With Lower Back Connection

Lower Back Connection

Designed for harsh environments prone to vibration, these gauges pair a corrosion-resistant 304 stainless steel case with a glycerin-filled dial to reduce needle flutter. Use them with vacuum pumps, packaging equipment, and in suction lines to measure and display vacuum.

For technical drawings and 3-D models, click on a part number.

304 Stainless Steel Case with Brass Connection—Dual Scale (in. of Hg, kPa)

For Use With: Air
Accuracy: ±1% Mid Scale (Grade A); except
4" Dial Dia.: ±1% Full Scale (Grade 1A)

		Available Vacuum Ranges
		Gauges with NIST Certificate
Vacuum Range		Graduation Marks		Numeric Increments
in. of Hg	kPa	in. of Hg	kPa	in. of Hg	kPa
4" Dial Diameter
30 to 0	-100 to 0	0.5	1	5	10

					Lower Back Connection
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Liquid Type		Each
NPT Male with Calibration Certificate Traceable to NIST
4"	1/4	35° to 140°	35° to 140°	Glycerin	000000000	0000000

About Pressure Gauges

About Pipe Size

Vibration- and Corrosion-Resistant Pressure and Vacuum Gauges

Pressure and Vacuum Gauges

Corrosion-Resistant Pressure and Vacuum Gauges

Vibration-Resistant Pressure and Vacuum Gauges

Refrigeration Pressure and Vacuum Gauges

3-in-1 Pressure and Vacuum Gauges

Absolute Pressure Gauges

Vibration- and Corrosion-Resistant Vacuum Gauges