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Gas Pressure Gauges







Use these gauges with pumps, filters, regulators, and in process lines to monitor the pressure of compressed gas. Mount them with the dial face upright. Gauges for use with acetylene can also be used in welding applications.
Gauges with brass case are cleaned to meet ASME B40.1, Level IV for oxygen service.
Gauges with 304 stainless steel case are cleaned and bagged to meet ASME B40.1, Level IV for oxygen service.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Acetylene, Carbon Dioxide, and Oxygen
- Accuracy: ±2% Mid Scale (Grade B)
Available Pressure Ranges | ||
---|---|---|
Pressure Range, psi | Graduation Marks, psi | Numeric Increments, psi |
0 to 30 | 1 | 5 |
0 to 60 | 1 | 10 |
0 to 100 | 2 | 20 |
0 to 200 | 5 | 40 |
0 to 400 | 10 | 50 |
0 to 600 | 10 | 100 |
0 to 1,000 | 20 | 200 |
0 to 2,000 | 50 | 400 |
0 to 3,000 | 50 | 500 |
0 to 4,000 | 100 | 500 |
- For Use With: Oxygen
- Accuracy: ±1% Mid Scale (Grade A); except
4" Dial Dia.: ±1% Full Scale (Grade 1A)
Available Pressure Ranges | |||||||||
---|---|---|---|---|---|---|---|---|---|
Bottom and Center Back Connections | Lower Back Connection | ||||||||
Pressure Range | Graduation Marks | Numeric Increments | Graduation Marks | Numeric Increments | |||||
psi | kPa | psi | kPa | psi | kPa | psi | kPa | psi | kPa |
2 1/2" Dial Diameter | |||||||||
0 to 15 | 0 to 102 | 0.2 | 2 | 3 | 20 | __ | __ | __ | __ |
0 to 30 | 0 to 205 | 0.5 | 5 | 5 | 50 | __ | __ | __ | __ |
0 to 100 | 0 to 680 | 2 | 10 | 20 | 100 | __ | __ | __ | __ |
0 to 200 | 0 to 1,350 | 5 | 50 | 50 | 200 | __ | __ | __ | __ |
0 to 300 | 0 to 2,050 | 5 | 50 | 50 | 500 | __ | __ | __ | __ |
0 to 600 | 0 to 4,100 | 10 | 100 | 100 | 1,000 | __ | __ | __ | __ |
4" Dial Diameter | |||||||||
0 to 15 | 0 to 103 | 0.2 | 1 | 3 | 10 | 0.2 | 1 | 3 | 10 |
0 to 30 | 0 to 206 | 0.5 | 2 | 5 | 20 | 0.5 | 2 | 5 | 20 |
0 to 100 | 0 to 680 | 1 | 10 | 10 | 100 | 1 | 10 | 10 | 100 |
0 to 200 | 0 to 1,360 | 2 | 20 | 20 | 200 | 2 | 20 | 20 | 200 |
0 to 300 | 0 to 2,060 | 5 | 20 | 50 | 200 | 5 | 20 | 50 | 200 |
0 to 600 | 0 to 4,100 | 10 | 50 | 100 | 500 | 10 | 100 | 100 | 1,000 |
Dial Diameter | Pipe Size | Environment Temp. Range, °F | Process Temp. Range, °F | Mounting Orientation | Each | |
Bottom Connection | ||||||
---|---|---|---|---|---|---|
NPT Male | ||||||
2 1/2" | 1/4 | -40° to 140° | -40° to 140° | Upright | 0000000 | 000000 |
4" | 1/4 | -40° to 140° | -40° to 140° | Upright | 0000000 | 00000 |
Center Back Connection | ||||||
NPT Male | ||||||
2 1/2" | 1/4 | -40° to 140° | -40° to 140° | Upright | 0000000 | 00000 |
Lower Back Connection | ||||||
NPT Male | ||||||
4" | 1/4 | -40° to 140° | -40° to 140° | Upright | 0000000 | 00000 |
Pressure Transmitters for Oxygen

- For Use With: Oxygen
- Accuracy: ±1.0%
- Pipe Connection: NPT Male
- Housing Material: Glass-Reinforced Nylon
- Connection Material: 304 Stainless Steel
- Temperature Range: -40° to 255° F
Adhere to safety standards and monitor pressure when working with high concentrations of oxygen. These transmitters are cleaned following ASME B40.100 IV guidelines and are sealed in an airtight bag to prevent contamination before use. Also known as transducers, they convert pressure to an electrical signal that can be interpreted by receiving devices, such as remote displays, programmable logic controllers, and motor speed controls. For your receiving device to interpret the signal from the transmitter, you will need to calibrate it for the transmitter's pressure range and output signal. As pressure increases, the output signal from the transmitter will increase. Transmitters will only provide accurate readings within the rated pressure range.
These transmitters are rated NEMA 4X and IP65 for protection from dust, weather, washdown, and corrosion. UL and C-UL recognized components and CE marked, they also meet American, Canadian, and European safety standards.
With a current output, they connect using two wires. The same wire is used to send a signal to the receiver and to power the transmitter. Current doesn’t lose signal over long distances and isn’t affected by electrical interference from other devices.
For technical drawings and 3-D models, click on a part number.
Pressure Range, psi | Maximum Continuous Pressure, psi | Maximum Short-Term Pressure, psi | Input Voltage | Pipe Size | Ht. | Wd. | Environmental Rating | Each | |
4-20mA Current Output—Wire Leads | |||||||||
---|---|---|---|---|---|---|---|---|---|
0-30 | 60 | 60 | 9-36V DC | 1/4 | 2 3/8" | 1 5/16" | IP65, NEMA 4X | 0000000 | 0000000 |
0-60 | 120 | 120 | 9-36V DC | 1/4 | 2 3/8" | 1 5/16" | IP65, NEMA 4X | 0000000 | 000000 |
0-100 | 200 | 200 | 9-36V DC | 1/4 | 2 3/8" | 1 5/16" | IP65, NEMA 4X | 0000000 | 000000 |
0-300 | 600 | 600 | 9-36V DC | 1/4 | 2 3/8" | 1 5/16" | IP65, NEMA 4X | 0000000 | 000000 |
0-500 | 1,000 | 1,000 | 9-36V DC | 1/4 | 2 3/8" | 1 5/16" | IP65, NEMA 4X | 0000000 | 000000 |
0-1,000 | 2,000 | 2,000 | 9-36V DC | 1/4 | 2 3/8" | 1 5/16" | IP65, NEMA 4X | 0000000 | 000000 |
0-1,500 | 3,000 | 3,000 | 9-36V DC | 1/4 | 2 3/8" | 1 5/16" | IP65, NEMA 4X | 0000000 | 000000 |
Tank-Mount Pressure-Regulating Valves for Air and Inert Gas
- For Use With: See Table
- Temperature Range: -20° to 120° F
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. Valves have a gauge to monitor outlet pressure and a gauge to monitor inlet pressure from the tank.
Choose a valve with a maximum outlet pressure that’s approximately twice your application’s normal operating pressure. Your operating pressure should never exceed 75% of the valve’s maximum outlet pressure.
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 a brass body have a longer service life than valves with a brass and steel body.
Valves with a stainless steel diaphragm can withstand harsh environments.


Inlet | Outlet | Material | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
CGA Number | Location | Thread Direction | Pressure Gauge Range, psi | Location | Thread Direction | Pressure Range, psi | Pressure Adjustment Method | Body | Seal | Diaphragm | Each | |
For Use With Oxygen | ||||||||||||
9/16"-18 UNF Male Outlet × NGO Female Inlet | ||||||||||||
CGA 540 | Side | Right Hand | 0 to 4,000 | Side | Left Hand | 0 to 50 | Knob | Brass | PTFE | Neoprene | 00000000 | 0000000 |
CGA 540 | Side | Right Hand | 0 to 4,000 | Side | Right Hand | 0 to 50 | T-Handle | Brass | PTFE | Neoprene | 00000000 | 000000 |
CGA 540 | Side | Right Hand | 0 to 4,000 | Side | Right Hand | 0 to 50 | T-Handle | Brass | PTFE | Stainless Steel | 00000000 | 000000 |
CGA 540 | Side | Right Hand | 0 to 4,000 | Side | Right Hand | 0 to 125 | T-Handle | Brass | PTFE | Rubber | 0000000 | 000000 |
CGA 540 | Side | Right Hand | 0 to 4,000 | Side | Right Hand | 0 to 125 | T-Handle | Brass | PTFE | Stainless Steel | 0000000 | 000000 |
CGA 540 | Side | Right Hand | 0 to 4,000 | Side | Right Hand | 0 to 145 | Knob | Brass/Steel | PTFE | Rubber | 0000000 | 000000 |
CGA 540 | Side | Right Hand | 0 to 4,000 | Side | Right Hand | 0 to 200 | T-Handle | Brass | PTFE | Rubber | 000000 | 000000 |
CGA 540 | Side | Right Hand | 0 to 4,000 | Side | Right Hand | 0 to 200 | T-Handle | Brass | PTFE | Stainless Steel | 00000000 | 000000 |


Inlet | Outlet | Material | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
CGA Number | Location | Thread Direction | Pressure Gauge Range, psi | Location | Thread Direction | Pressure Range, psi | Pressure Adjustment Method | Body | Seal | Diaphragm | Each | |
For Use With Oxygen | ||||||||||||
1/4 NPT Female Outlet × NGO Female Inlet | ||||||||||||
CGA 540 | Side | Right Hand | 0 to 4,000 | Side | Right Hand | 0 to 250 | T-Handle | Brass | PTFE | Neoprene | 0000000 | 0000000 |
CGA 540 | Side | Right Hand | 0 to 4,000 | Side | Right Hand | 0 to 250 | T-Handle | Brass | PTFE | Stainless Steel | 0000000 | 000000 |
9/16"-18 UNF Male Outlet × NGO Female Inlet | ||||||||||||
CGA 540 | Side | Right Hand | 0 to 4,000 | Side | Right Hand | 0 to 50 | T-Handle | Brass | PTFE | Neoprene | 00000000 | 000000 |
CGA 540 | Side | Right Hand | 0 to 4,000 | Side | Right Hand | 0 to 50 | T-Handle | Brass | PTFE | Stainless Steel | 00000000 | 000000 |
CGA 540 | Side | Right Hand | 0 to 4,000 | Side | Right Hand | 0 to 125 | T-Handle | Brass | PTFE | Stainless Steel | 0000000 | 000000 |
CGA 540 | Side | Right Hand | 0 to 4,000 | Side | Right Hand | 0 to 125 | T-Handle | Brass/Steel | PTFE | Rubber | 000000 | 000000 |
Tank-Mount High-Pressure-Regulating Valves for Air and Inert Gas
- For Use With: See Table
- Temperature Range: -20° to 120° F
Often used for pressure-vessel testing and other high-pressure applications, these valves can handle at least seven times the outlet pressure of standard tank-mount pressure-regulating valves. 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. Outlet fittings are Swagelok® for a leak-free seal around hard metal tubing in high-pressure lines. Also known as instrumentation fittings, Swagelok® fittings are compatible with Parker A-Lok, Gyrolok, Bilok, and Tylok fittings. Valves have a gauge to monitor outlet pressure and a 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.
Choose a valve with a maximum outlet pressure that’s approximately twice your application’s normal operating pressure. Your operating pressure should never exceed 75% of the valve’s maximum outlet pressure.

Inlet | Outlet | Material | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
CGA Number | Location | Thread Direction | Pressure Gauge Range, psi | Stage | For Tube OD | Location | Pressure Range, psi | Pressure Adjustment Method | Shape | Body | Seal | Diaphragm | Each | |
NGO Female Inlet × Swagelok® Female Outlet | ||||||||||||||
CGA 540 | Side | Right Hand | 0 to 4,000 | Single | 1/4" | Side | 0 to 1,500 | Knob | Straight | Brass | PCTFE | Neoprene | 0000000 | 0000000 |
CGA 540 | Side | Right Hand | 0 to 4,000 | Single | 1/4" | Side | 0 to 2,500 | Knob | Straight | Brass | PCTFE | Neoprene | 0000000 | 000000 |
Tank-Mount Pressure-Regulating Valves for Cryogenic Cylinders

- For Use With: See Table
- Temperature Range: -20° to 120° F
Automatically reduce a high inlet pressure from compressed gas tanks to a lower, stable outlet pressure. These valves can remove gases from liquid cryogenic cylinders. They 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 come with a gauge to monitor outlet pressure. They are single stage and reduce pressure in one step, which causes the outlet pressure to fluctuate slightly as you empty the tank.
Choose a valve with a maximum outlet pressure that’s approximately twice your application’s normal operating pressure. Your operating pressure should never exceed 75% of the valve’s maximum outlet pressure.
Inlet | Outlet | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
For Use With | CGA Number | Location | Thread Direction | Stage | Thread Size | Location | Thread Direction | Pressure Range, psi | Pressure Adjustment Method | Each | |
UNF Male Outlet × NGO Female Inlet | |||||||||||
Brass Body—Stainless Steel Diaphragm and PTFE Seal | |||||||||||
Oxygen | CGA 540 | Side | Right Hand | Single | 9/16"-18 | Bottom | Right Hand | 0 to 125 | T-Handle | 0000000 | 0000000 |