Carbon Dioxide Monitors | McMaster-Carr

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	For Use With For Use With

Acetylene

Air

Argon

Argon/Carbon Dioxide
Blend

	Measures Measures

Ambient Temperature

Carbon Dioxide

Carbon Monoxide

Combustion Efficiency

Differential Pressure

	Scale Scale

	Connection Location Connection Location


Bottom	Center Back	Lower Back

	Pipe Size Pipe Size

1/8

1/4

1/2

	Thread Type Thread Type

	Detects Detects

Carbon Dioxide

	Dial Type Dial Type


Dry	Liquid Filled

	Display Type Display Type


Digital	Dial

U-Tube

	Scale Type Scale Type


Single	Dual

	System of Measurement System of Measurement

Inch

	Dial Diameter Dial Diameter

1 1/2"

1 5/8"

2 1/2"

	Case Material Case Material

	Connection Material Connection Material

Stainless Steel

Brass

Plastic

	Gender Gender

Male

Female

	Maximum Process Temperature Maximum Process Temperature

	Connection Style Connection Style

Threaded

Barbed

Compression

	Power Source Power Source

Battery

Electric

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

DFARS Specialty Metals
COTS-Exempt

	Connection Type Connection Type


Pipe	Tube

	Accuracy Scale Accuracy Scale

Full Scale

Mid Scale

	Accuracy Grade Accuracy Grade

Not Graded

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

RoHS Compliant with
Exemptions

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

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75 Products

About Pipe Size

About Pressure Gauges

About Gas Regulators

Measure and display real-time indoor ventilation quality. These meters operate with the included universal AC adapter or six AAA batteries. They have automatic baseline calibration. Transfer and view data on your computer using their USB cable and software.

Measuring Range, ppm	Temperature Range, ° F	Mount Type	Ht.	Wd.	Dp.	Power Source	Batteries Included	Number of Batteries Required	Battery Size	Electrical Connection	Voltage	Cord Lg., ft.		Each
0-9,999	32° to 122°	Portable	8 1/4"	2 1/2"	1 1/2"	Battery, Electric	Yes	6	AAA	Plug In	240V AC	3	000000000	0000000

Low-Pressure Differential Gauges with U-Tube

Also known as manometers, these gauges come with indicating liquid that moves up and down two columns—the difference in height between them is your pressure. They are commonly used to indicate clogged filters.

Magnet-mount gauges can be moved for use in multiple locations. Gauges with barbed tube connection have a flexible body that rolls up for storage or transport.

316 Stainless Steel Connection—(in. of H₂O)

For Use With: Acetylene, Air, Argon, Carbon Dioxide, and Steam
Accuracy: Not Rated (Not Graded)

						Environment Temp. Range		Process Temp. Range				Mounting
Pressure Range, in. of H₂O	Scale Range, in. of H₂O	Numeric Increments, in. of H₂O	Graduation Marks, in. of H₂O	Max. Pressure, psi	Ht.	Min., °F	Max., °F	Min., °F	Max., °F	Gender	Mount Type	Fasteners Included	Hole Dia.	Number of Holes		Each
With 1/4 NPT Female Threaded Pipe Connection
0-10	5-0-5	1	0.1	250	14"	35°	150°	35°	250°	Female	Screw On	No	3/16"	4	0000000	0000000
0-15	7-0-7	1	0.1	250	18"	35°	150°	35°	250°	Female	Screw On	No	3/16"	4	0000000	000000

Nylon Plastic Connection—(in. of H₂O)

For Use With: Air, Argon, Carbon Dioxide, and Hydrogen
Accuracy: Not Rated (Not Graded)

With Barbed Tube Connection for 3/16" Tube ID
Pressure Range, in. of H₂O	Scale Range, in. of H₂O	Numeric Increments, in. of H₂O	Graduation Marks, in. of H₂O	Max. Pressure	Ht.	Max. Process Temp., °F	Gender	Mount Type		Each
0-8	4-0-4	1	0.1	Not Rated	17"	130°	Male	Magnet	0000000	0000000
0-12	6-0-6	1	0.1	Not Rated	21"	130°	Male	Magnet	0000000	000000
0-16	8-0-8	1	0.1	Not Rated	25"	130°	Male	Magnet	0000000	000000
0-24	12-0-12	1	0.1	Not Rated	33"	130°	Male	Magnet	0000000	000000
0-30	15-0-15	1	0.1	Not Rated	39"	130°	Male	Magnet	0000000	000000
0-36	18-0-18	1	0.1	Not Rated	45"	130°	Male	Magnet	0000000	000000
0-48	24-0-24	1	0.1	Not Rated	57"	130°	Male	Magnet	0000000	000000
0-60	30-0-30	1	0.1	Not Rated	69"	130°	Male	Magnet	0000000	000000
0-72	36-0-36	1	0.1	Not Rated	81"	130°	Male	Magnet	0000000	000000

Brass Connection—(in. of H₂O)

For Use With: Air, Argon, Carbon Dioxide, and Hydrogen
Accuracy: Not Rated (Not Graded)

With Compression Tube Connection for 1/4" Tube OD
Pressure Range, in. of H₂O	Scale Range, in. of H₂O	Numeric Increments, in. of H₂O	Graduation Marks, in. of H₂O	Max. Pressure, psi	Ht.	Gender	Mount Type		Each
0-8	4-0-4	1	0.1	100	20"	Female	Magnet	0000000	0000000
0-12	6-0-6	1	0.1	100	25"	Female	Magnet	0000000	000000
0-16	8-0-8	1	0.1	100	30"	Female	Magnet	0000000	000000
0-20	10-0-10	1	0.1	100	34"	Female	Magnet	0000000	000000
0-24	12-0-12	1	0.1	100	39"	Female	Magnet	0000000	000000
0-36	18-0-18	1	0.1	100	58"	Female	Magnet	0000000	000000

Vibration-Resistant Pressure Gauges

Dual Scale With Bottom Connection

Single Scale With Lower Back Connection

Single Scale With Bottom Connection

Single Scale With Center Back Connection

Center Back Connection

Bottom Connection

Center Back Connection (Panel Mount)

Lower Back Connection

A liquid-filled dial reduces needle flutter for precise readings in high-vibration applications. Gauges are commonly used with pumps, filters, regulators, and in process lines to measure and display pressure. Mount them with the dial face upright.

Gauges with 304 stainless steel case and ABS plastic case have better corrosion resistance than gauges with brass case.

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

ABS Plastic Case with Brass Connection—Single Scale (psi)

For Use With: Air, Water, Hydraulic Fluid, Carbon Dioxide, and Natural Gas
Accuracy: ±2.5% Full Scale (Not Graded)

Available Pressure Ranges
Pressure Range, psi	Graduation Marks, psi	Numeric Increments, psi
0 to 30	0.5	5
0 to 60	1	10
0 to 100	2	20
0 to 160	4	40
0 to 300	5	50
0 to 2,000	40	400
0 to 3,000	50	500
0 to 5,000	100	1,000

							Center Back Connection
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Case Color	Liquid Type	Mounting Orientation		Each
NPT Male
1 1/2"	1/8	0° to 140°	0° to 140°	Black	Glycerin	Upright	00000000	000000

ABS Plastic Case with Brass Connection—Dual Scale (psi, kPa)

For Use With: Air, Water, Hydraulic Fluid, Carbon Dioxide, and Natural Gas
Accuracy: ±1% Mid Scale (Grade A)

Available Pressure Ranges
Pressure Range		Graduation Marks		Numeric Increments
psi	kPa	psi	kPa	psi	kPa
0 to 30	0 to 205	0.5	5	5	50
0 to 60	0 to 410	1	10	10	100
0 to 100	0 to 680	2	20	20	200
0 to 160	0 to 1,100	4	40	40	400
0 to 200	0 to 1,360	4	40	40	400
0 to 300	0 to 2,050	5	50	50	500
0 to 400	0 to 2,700	10	100	100	1,000
0 to 600	0 to 4,100	10	100	100	1,000
0 to 1,000	0 to 6,800	20	200	200	2,000
0 to 1,500	0 to 10,200	20	200	300	3,000
0 to 2,000	0 to 13,600	40	400	400	4,000
0 to 3,000	0 to 20,500	50	500	500	5,000
0 to 5,000	0 to 34,000	100	1,000	1,000	10,000
0 to 6,000	0 to 41,000	100	1,000	1,000	10,000

Bottom Connection

NPT Male
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Case Color	Liquid Type	Mounting Orientation		Each
2 1/2"	1/4	0° to 140°	0° to 140°	Black	Glycerin	Upright	000000	000000

Center Back Connection

NPT Male
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Case Color	Liquid Type	Mounting Orientation		Each
2 1/2"	1/4	0° to 140°	0° to 140°	Black	Glycerin	Upright	000000	000000

Center Back Connection (Panel Mount)

NPT Male
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Case Color	Liquid Type	Mounting Orientation	For Panel Cutout Dia.		Each
2 1/2"	1/4	0° to 140°	0° to 140°	Black	Glycerin	Upright	2 1/2"	000000	000000

Brass Case with Brass Connection—Single Scale (psi)

For Use With: Air, Water, Hydraulic Fluid, and Natural Gas; except
With NIST Certificate: Air, Water, Hydraulic Fluid, Carbon Dioxide, Ethanol, and Natural Gas
Accuracy: ±1.5% Full Scale (Not Graded); except
2 1/2" Dia. NPT Male: ±1.% Mid Scale (Grade A)
4" Dia. NPT Male and NPT Male with NIST Certificate: ±1% Full Scale (Grade 1A)

	Available Pressure Ranges
	Gauges with NIST Certificate
Pressure Range, psi	Graduation Marks, psi	Numeric Increments, psi
NPT Male
2 1/2" Dial Diameter
0 to 30	0.5	5
0 to 60	1	10
0 to 100	2	20
0 to 160	4	40
0 to 200	4	40
0 to 300	5	50
0 to 400	10	100
0 to 600	10	100
0 to 800	20	200
0 to 1,000	20	200
0 to 1,500	20	300
0 to 2,000	40	400
0 to 3,000	50	500
0 to 5,000	100	1,000
0 to 6,000	100	1,000
0 to 10,000	200	2,000
4" Dial Diameter
0 to 30	0.5	5
0 to 60	1	10
0 to 100	2	20
0 to 160	2	20
0 to 200	4	40
0 to 300	5	50
0 to 400	5	50
0 to 600	10	100
0 to 800	10	100
0 to 1,000	20	200
0 to 1,500	20	300
0 to 2,000	40	400
0 to 3,000	50	500
0 to 5,000	100	1,000
0 to 6,000	100	1,000
0 to 10,000	200	2,000

Bottom Connection
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Liquid Type	Mounting Orientation		Each
NPT Male with NIST Certificate
2 1/2"	1/4	0° to 140°	0° to 140°	Glycerin	Upright	0000000	0000000
4"	1/4	0° to 140°	0° to 140°	Glycerin	Upright	0000000	000000
Center Back Connection
NPT Male with NIST Certificate
2 1/2"	1/4	0° to 140°	0° to 140°	Glycerin	Upright	0000000	000000
Lower Back Connection
NPT Male with NIST Certificate
4"	1/4	0° to 140°	0° to 140°	Glycerin	Upright	0000000	000000

304 Stainless Steel Case with Brass Connection—Dual Scale (psi, bar)

For Use With: Air, Water, Hydraulic Fluid, Carbon Dioxide, and Natural Gas
Accuracy: ±1.5% Full Scale (Not Graded)

Available Pressure Ranges
Pressure Range		Graduation Marks		Numeric Increments
psi	bar	psi	bar	psi	bar
NPT Male
0 to 15	0 to 1	0.2	0.02	3	0.3
0 to 30	0 to 2	0.5	0.05	5	0.5
0 to 60	0 to 4.1	1	0.1	10	1
0 to 100	0 to 6.8	2	0.2	20	2
0 to 160	0 to 11	4	0.4	40	4
0 to 200	0 to 13.6	4	0.4	40	4
0 to 300	0 to 20.5	5	0.5	50	5
0 to 400	0 to 27	10	1	100	10
0 to 600	0 to 41	10	1	100	10
0 to 1,000	0 to 68	20	2	200	20
0 to 1,500	0 to 100	20	2	300	30
0 to 2,000	0 to 136	40	4	400	40
0 to 3,000	0 to 205	50	5	500	50
0 to 5,000	0 to 340	100	10	1,000	100
0 to 6,000	0 to 410	100	10	1,000	100
0 to 10,000	0 to 680	200	20	2,000	200
BSPP Male
0 to 14.4	0 to 1	0.4	0.02	4	0.2
0 to 22.8	0 to 1.6	0.6	0.04	6	0.4
0 to 36	0 to 2.5	1	0.05	10	0.5
0 to 57.6	0 to 4	1.6	0.1	16	1
0 to 86	0 to 6	2	0.1	20	1
0 to 144	0 to 10	4	0.2	40	2
0 to 228	0 to 16	6	0.4	60	4
0 to 360	0 to 25	10	0.5	100	5
0 to 576	0 to 40	16	1	160	10
0 to 860	0 to 60	20	1	200	10
0 to 1,440	0 to 100	40	2	400	20
0 to 2,280	0 to 160	60	4	600	40
0 to 3,600	0 to 250	100	5	1,000	50
0 to 5,800	0 to 400	160	10	1,600	100
0 to 8,600	0 to 600	200	10	2,000	100

						Bottom Connection		Center Back Connection
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Liquid Type	Mounting Orientation		Each		Each
NPT Male
2 1/2"	1/4	0° to 140°	0° to 140°	Glycerin	Upright	0000000	000000	0000000	000000
BSPP Male
2 1/2"	1/4	0° to 140°	0° to 140°	Glycerin	Upright	0000000	00000	0000000	00000

Maximum-Indicating Vibration-Resistant Pressure Gauges

Bottom Connection

Center Back Connection

Center Back Connection (Panel Mount)

Bottom Connection

Center Back Connection

Center Back Connection (Panel Mount)

These gauges have a red needle that indicates the highest pressure reached since the last setting. They have a glycerin-filled dial that reduces needle flutter for precise readings in high-vibration applications. Use them with pumps, filters, regulators, and in process lines to measure and display pressure. Mount gauges with the dial face upright.

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

Brass Case with Brass Connection—Single Scale (psi)

For Use With: Air, Water, Hydraulic Fluid, Carbon Dioxide, Ethanol, and Natural Gas
Accuracy: ±1.5% Full Scale (Not Graded)

Available Pressure Ranges
Pressure Range, psi	Graduation Marks, psi	Numeric Increments, psi
0 to 15	0.2	3
0 to 30	0.5	5
0 to 60	1	10
0 to 100	2	20
0 to 160	4	40
0 to 200	4	40
0 to 300	5	50
0 to 400	10	100
0 to 600	10	100
0 to 1,000	20	200
0 to 1,500	20	300
0 to 3,000	50	500
0 to 5,000	100	1,000
0 to 7,500	100	1,500
0 to 10,000	200	2,000
0 to 15,000	200	3,000

Bottom Connection

NPT Male
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Liquid Type	Mounting Orientation		Each
2 1/2"	1/4	0° to 140°	0° to 140°	Glycerin	Upright	0000000	0000000
NPT Male with Calibration Certificate Traceable to NIST
2 1/2"	1/4	0° to 140°	0° to 140°	Glycerin	Upright	0000000	000000

Center Back Connection

NPT Male
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Liquid Type	Mounting Orientation		Each
2 1/2"	1/4	0° to 140°	0° to 140°	Glycerin	Upright	0000000	0000000
NPT Male with Calibration Certificate Traceable to NIST
2 1/2"	1/4	0° to 140°	0° to 140°	Glycerin	Upright	0000000	000000

Center Back Connection (Panel Mount)

NPT Male
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Liquid Type	Mounting Orientation	For Panel Cutout Dia.		Each
2 1/2"	1/4	0° to 140°	0° to 140°	Glycerin	Upright	2 1/2"	0000000	0000000
NPT Male with Calibration Certificate Traceable to NIST
2 1/2"	1/4	0° to 140°	0° to 140°	Glycerin	Upright	2 1/2"	0000000	000000

Pressure Gauges

Dual Scale With Center Back Connection

Bottom Connection

Center Back Connection

These are the most commonly used pressure gauges. Use them with pumps, filters, regulators, and in process lines to measure and display pressure.

Gauges with 304 stainless steel case or ABS plastic case have better corrosion resistance than gauges with brass or steel case.

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

ABS Plastic Case with Brass Connection—Dual Scale (psi, kPa)

For Use With: Air, Water, Hydraulic Fluid, Carbon Dioxide, and Natural Gas
Accuracy: ±2% Mid Scale (Grade B)
Mount with the dial face upright

Available Pressure Ranges
Pressure Range		Graduation Marks		Numeric Increments
psi	kPa	psi	kPa	psi	kPa
0 to 30	0 to 200	1	5	5	50
0 to 60	0 to 400	2	10	10	100
0 to 100	0 to 700	2	20	20	100
0 to 160	0 to 1,100	5	20	20	200
0 to 200	0 to 1,400	5	50	40	200
0 to 300	0 to 2,000	10	50	50	500
0 to 600	0 to 4,000	20	100	100	1,000
0 to 1,000	0 to 7,000	20	200	200	1,000

						Bottom Connection		Center Back Connection
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Case Color	Mounting Orientation		Each		Each
BSPT Male
1 5/8"	1/8	-40° to 120°	-40° to 120°	Black	Upright	0000000	000000	0000000	000000
2"	1/4	-40° to 120°	-40° to 120°	Black	Upright	0000000	00000	0000000	00000
2 1/2"	1/4	-40° to 120°	-40° to 120°	Black	Upright	0000000	00000	0000000	00000

Square Panel-Mount Pressure Gauges

Center Back Connection (Panel Mount)

These gauges fit into square cutouts in your instrument panel. Use them with pumps, filters, regulators, and in process lines to measure and display pressure.

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

ABS Plastic Case with Brass Connection—Single Scale (psi)

For Use With: Air, Water, Hydraulic Fluid, Carbon Dioxide, and Natural Gas
Accuracy: ±2.5% Full Scale (Not Graded)

Available Pressure Ranges
Pressure Range, psi	Graduation Marks, psi	Numeric Increments, psi
0 to 15	0.5	1
0 to 30	1	5
0 to 60	2	10
0 to 100	1	10
0 to 160	5	20
0 to 200	2	20
0 to 300	10	50

					Center Back Connection (Panel Mount)
Dial					For Panel Cutout
Ht.	Wd.	Environment Temp. Range, °F	Process Temp. Range, °F	Case Color	Ht.	Wd.		Each
1/8 NPT Male/10-32 UNF Female
2"	2"	0° to 140°	0° to 140°	Black	1 49/64"	1 49/64"	0000000	000000

High-Accuracy Low-Pressure Gauges

Single Scale With Bottom Connection

Single Scale With Center Back Connection

Bottom Connection

Center Back Connection

Measure small pressure changes in ventilation systems, hydraulic applications, and other critical processes with these high-accuracy gauges. Mount them with the dial face upright.

Gauges with 304 stainless steel case or polyester plastic case have better corrosion resistance than gauges with steel case.

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

Painted Steel Case with Brass Connection—Single Scale (psi)

For Use With: Air, Water, Hydraulic Fluid, Carbon Dioxide, and Natural Gas
Accuracy: ±1.5% Full Scale (Not Graded)

Available Pressure Gauges
Pressure Range, psi	Graduation Marks, psi	Numeric Increments, psi
0 to 3	0.05	0.5
0 to 5	0.1	1
0 to 10	0.2	2

						Bottom Connection		Center Back Connection
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Case Color	Mounting Orientation		Each		Each
NPT Male
2 1/2"	1/4	0° to 140°	0° to 140°	Black	Upright	0000000	000000	0000000	000000
NPT Male with Calibration Certificate Traceable to NIST
2 1/2"	1/4	0° to 140°	0° to 140°	Black	Upright	0000000	000000	0000000	000000

Painted Steel Case with Brass Connection—Single Scale (in. of H₂O)

For Use With: Air, Water, Hydraulic Fluid, Carbon Dioxide, and Natural Gas
Accuracy: ±1.5% Full Scale (Not Graded)

Available Pressure Gauges
Pressure Range, in. of H₂O	Graduation Marks, in. of H₂O	Numeric Increments, in. of H₂O
0 to 10	0.2	2
0 to 15	0.2	3
0 to 30	0.5	5
0 to 60	1	10
0 to 100	2	20
0 to 160	4	40
0 to 200	4	40

						Bottom Connection		Center Back Connection
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Case Color	Mounting Orientation		Each		Each
NPT Male
2 1/2"	1/4	0° to 140°	0° to 140°	Black	Upright	0000000	000000	0000000	000000
NPT Male with Calibration Certificate Traceable to NIST
2 1/2"	1/4	0° to 140°	0° to 140°	Black	Upright	0000000	000000	0000000	000000

Painted Steel Case with Brass Connection—Single Scale (oz./in.²)

For Use With: Air, Water, Hydraulic Fluid, Carbon Dioxide, and Natural Gas
Accuracy: ±1.5% Full Scale (Not Graded)

Available Pressure Gauges
Pressure Range, oz./in.²	Graduation Marks, oz./in.²	Numeric Increments, oz./in.²
0 to 10	0.2	2
0 to 15	0.2	3
0 to 30	0.5	5
0 to 60	1	10
0 to 100	2	20
0 to 160	4	40

						Bottom Connection		Center Back Connection
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Case Color	Mounting Orientation		Each		Each
NPT Male
2 1/2"	1/4	0° to 140°	0° to 140°	Black	Upright	0000000	000000	0000000	000000
NPT Male with Calibration Certificate Traceable to NIST
2 1/2"	1/4	0° to 140°	0° to 140°	Black	Upright	0000000	000000	0000000	000000

304 Stainless Steel Case with Brass Connection—Single Scale (psi)

For Use With: Air, Water, Hydraulic Fluid, Carbon Dioxide, and Natural Gas
Accuracy: ±1% Full Scale (Grade 1A)

Available Pressure Gauges
Pressure Range, psi	Graduation Marks, psi	Numeric Increments, psi
0 to 3	0.05	0.5
0 to 5	0.1	1
0 to 10	0.2	2

					Bottom Connection
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Mounting Orientation		Each
NPT Male
4"	1/4	0° to 140°	0° to 140°	Upright	000000	0000000

304 Stainless Steel Case with Brass Connection—Single Scale (in. of H₂O)

For Use With: Air, Water, Hydraulic Fluid, Carbon Dioxide, and Natural Gas
Accuracy: ±1% Full Scale (Grade 1A)

Available Pressure Gauges
Pressure Range, in. of H₂O	Graduation Marks, in. of H₂O	Numeric Increments, in. of H₂O
0 to 10	0.2	2
0 to 15	0.2	3
0 to 30	0.5	5
0 to 60	1	10
0 to 100	2	20
0 to 160	2	20
0 to 200	4	40

					Bottom Connection
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Mounting Orientation		Each
NPT Male
4"	1/4	0° to 140°	0° to 140°	Upright	000000	0000000

304 Stainless Steel Case with Brass Connection—Single Scale (oz./in.²)

For Use With: Air, Water, Hydraulic Fluid, Carbon Dioxide, and Natural Gas
Accuracy: ±1% Full Scale (Grade 1A)

Available Pressure Gauges
Pressure Range, oz./in.²	Graduation Marks, oz./in.²	Numeric Increments, oz./in.²
0 to 10	0.2	2
0 to 15	0.2	3
0 to 30	0.5	5
0 to 60	1	10

					Bottom Connection
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Mounting Orientation		Each
NPT Male
4"	1/4	0° to 140°	0° to 140°	Upright	000000	0000000

Low-Pressure Gauges for Chemicals

With PVC Guard

With CPVC Guard

With Polypropylene Guard

Bottom Connection (Plastic Guard)

A plastic or stainless steel guard, also known as an isolator, protects the gauge from damage caused by corrosive chemicals. Use them with pumps, filters, regulators, and in process lines to measure and display pressures.

Polypropylene and 316 stainless steel guards are more chemical resistant than PVC and CPVC guards.

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

Painted Steel Case with PVC Plastic Connection—Dual Scale (psi, kg/cm²)

For Use With: Water, Salt Water, Hydraulic Fluid, Bleach, Boric Acid, and Carbon Dioxide
Accuracy: ±2% Mid Scale (Grade B)

Available Pressure Ranges
Pressure Range		Graduation Marks		Numeric Increments
psi	kg/cm²	psi	kg/cm²	psi	kg/cm²
0 to 30	0 to 2.1	0.5	0.05	5	0.5
0 to 60	0 to 4.2	1	0.1	10	1
0 to 150	0 to 11.2	2	0.2	20	2

							Bottom Connection
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Case Color	Guard Material	Guard Color		Each
NPT Female
2"	1/4	40° to 140°	40° to 140°	Black	PVC Plastic	Gray	0000000	0000000
2"	1/2	40° to 140°	40° to 140°	Black	PVC Plastic	Gray	0000000	000000

Painted Steel Case with CPVC Plastic Connection—Dual Scale (psi, kg/cm²)

For Use With: Water, Salt Water, Hydraulic Fluid, Bleach, Boric Acid, and Carbon Dioxide
Accuracy: ±2% Mid Scale (Grade B)

Available Pressure Ranges
Pressure Range		Graduation Marks		Numeric Increments
psi	kg/cm²	psi	kg/cm²	psi	kg/cm²
0 to 30	0 to 2.1	0.5	0.05	5	0.5
0 to 60	0 to 4.2	1	0.1	10	1
0 to 150	0 to 11.2	2	0.2	20	2

							Bottom Connection
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Case Color	Guard Material	Guard Color		Each
NPT Female
2"	1/4	40° to 190°	40° to 190°	Black	CPVC Plastic	Gray	0000000	0000000
2"	1/2	40° to 190°	40° to 190°	Black	CPVC Plastic	Gray	0000000	000000

Painted Steel Case with Polypropylene Plastic Connection—Dual Scale (psi, kg/cm²)

For Use With: Water, Salt Water, Hydraulic Fluid, Boric Acid, and Carbon Dioxide
Accuracy: ±2% Mid Scale (Grade B)

Available Pressure Ranges
Pressure Range		Graduation Marks		Numeric Increments
psi	kg/cm²	psi	kg/cm²	psi	kg/cm²
0 to 30	0 to 2.1	0.5	0.05	5	0.5
0 to 60	0 to 4.2	1	0.1	10	1
0 to 150	0 to 11.2	2	0.2	20	2

							Bottom Connection
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Case Color	Guard Material	Guard Color		Each
NPT Female
2"	1/4	40° to 240°	40° to 240°	Black	Polypropylene Plastic	White	0000000	0000000

Tank-Mount Pressure-Regulating Valves with Flowmeter for Inert Gas

For Use With: See Table
Temperature Range: -20° to 120° F

Commonly used in TIG welding where gas flow/coverage is a concern, these valves measure the gas flow rate in addition to regulating pressure. They automatically reduce a high inlet pressure from compressed gas tanks to a lower, stable outlet pressure. All have Compressed Gas Association (CGA) numbered inlet fittings for secure connections to compressed gas tanks. Choose a valve with the same CGA number as your tank and other system components. Valves have a gauge to monitor the outlet flow rate and a second gauge to monitor inlet pressure from the tank. They are single stage and reduce pressure in one step, which causes the outlet pressure to fluctuate slightly as you empty the tank.

For Use With Carbon Dioxide

Female Outlet × Female Inlet

Female Outlet × Female Inlet With Hose

Inlet					Outlet					Material
CGA Number	Location	Thread Direction	Pressure Gauge Range, psi	Stage	Thread Size	Location	Thread Direction	Flow Range, scfh	Flow Gauge Included	Body	Seal	Diaphragm	Includes		Each
UNF Female Outlet × NGO Female Inlet
CGA 320	Side	Right Hand	0 to 4,000	Single	5/8"-18	Side	Right Hand	0 to 60	Yes	Brass	PTFE	Neoprene	__	0000000	0000000
CGA 320	Side	Right Hand	0 to 4,000	Single	5/8"-18	Side	Right Hand	0 to 60	Yes	Brass	PTFE	Neoprene	10-ft. long, 3/16" dia. hose with 5/8"-18 male fittings on both ends	0000000	000000
CGA 320	Side	Right Hand	0 to 4,000	Single	5/8"-18	Side	Right Hand	0 to 100	Yes	Brass	PTFE	Neoprene	__	0000000	000000

Easy-Read Tank-Mount Pressure-Regulating Valves with Flowmeter for Inert Gas

Male Inlet × Female Outlet With One Flowmeter

Female Inlet × Female Outlet With One Flowmeter

For Use With: See Table

Flowmeters let you see the gas flow rate from a distance. These valves automatically reduce a high inlet pressure from compressed gas tanks to a lower, stable outlet pressure. All have Compressed Gas Association (CGA) numbered inlet fittings for secure connections to compressed gas tanks. Choose a valve with the same CGA number as your tank and other system components. They have a gauge for monitoring inlet pressure from the tank.

Single-stage valves reduce pressure in one step, which causes the outlet pressure to fluctuate slightly as you empty the tank. They’re best for applications where a constant outlet pressure isn’t critical.

Two-stage valves progressively reduce pressure over two steps for more consistent outlet pressure at all times. They’re often used in applications that require a constant outlet pressure regardless of the tank level.

Valves with one flowmeter are for one piece of equipment on a tank. The flowmeter has a single scale.

Adapters (sold separately) change 5/8"-18 outlets to 9/16"-18 male connections, and vice versa.

For Use With Argon and Argon/Carbon Dioxide Blend

Inlet					Outlet					Material
CGA Number	Location	Thread Direction	Pressure Gauge Range, psi	Stage	Thread Size	Location	Thread Direction	Flow Range, scfh	Number of Flowmeters	Body	Seal	Diaphragm		Each
UNF Female Outlet × NGO Female Inlet
CGA 320	Side	Right Hand	0 to 3,000	Single	5/8"-18	Side	Right Hand	0 to 50 (Argon), 0 to 38 (Argon/Carbon Dioxide Blend)	1	Brass	PTFE	Neoprene	000000000	0000000
UNF Female Outlet × NGO Male Inlet
CGA 580	Side	Right Hand	0 to 3,000	Single	5/8"-18	Side	Right Hand	0 to 37 1/2 (Argon), 0 to 37 1/2 (Argon/Carbon Dioxide Blend)	1	Brass	PTFE	Neoprene	000000000	000000

Optional Adapter

00000000

Each

000000

For Use With Argon, Argon/Carbon Dioxide Blend, and Helium

Inlet					Outlet					Material
CGA Number	Location	Thread Direction	Pressure Gauge Range, psi	Stage	Thread Size	Location	Thread Direction	Flow Range, scfh	Number of Flowmeters	Body	Seal	Diaphragm		Each
UNF Female Outlet × NGO Male Inlet
CGA 580	Side	Right Hand	0 to 3,000	Single	5/8"-18	Side	Right Hand	0 to 40 (Argon), 0 to 40 (Argon/Carbon Dioxide Blend), 0 to 150 (Helium) to150	1	Brass	PTFE	Neoprene	000000000	0000000
CGA 580	Side	Right Hand	0 to 3,000	Two	5/8"-18	Side	Right Hand	0 to 40 (Argon), 0 to 40 (Argon/Carbon Dioxide Blend), 0 to 150 (Helium) to150	1	Brass	PTFE	Neoprene	000000000	000000

Optional Adapter

00000000

Each

000000

For Use With Carbon Dioxide

Inlet					Outlet					Material
CGA Number	Location	Thread Direction	Pressure Gauge Range, psi	Stage	Thread Size	Location	Thread Direction	Flow Range, scfh	Number of Flowmeters	Body	Seal	Diaphragm		Each
UNF Female Outlet × NGO Female Inlet
CGA 320	Side	Right Hand	0 to 4,000	Single	5/8"-18	Side	Right Hand	0 to 70	1	Brass	PTFE	Neoprene	00000000	0000000

Optional Adapter

00000000

Each

000000

Combustion Efficiency Meters

Also known as a combustion analyzer, this meter measures boiler and furnace combustion efficiency. It automatically calibrates to normal atmospheric oxygen.

	Measurement Range				Calculated Range
For Use On	Ambient Temp.	Flue Gas Temp.	Flue Gas Oxygen	Carbon Monoxide, ppm	Combustion Efficiency	Carbon Dioxide	Air Free Carbon Monoxide, ppm	Excess Air	Accuracy	Batteries Included		Each
Kerosene, Natural Gas, Oil, Propane	25° to 110° F	-4° to 1200° F	0-20.9%	0-2,000	0.1%-100%	0-15%	0-9,999	0-250%	±0.3% of Oxygen Content	Yes	0000000	0000000

Replacement Oxygen Sensor	0000000	Each	0000000
Replacement AA Batteries (Pkg. of 4)	00000000	Pkg.	0000

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Tank-Mount Pressure-Regulating Valves with Flowmeter for Inert Gas

Easy-Read Tank-Mount Pressure-Regulating Valves with Flowmeter for Inert Gas

Combustion Efficiency Meters