Oxygen Monitors | McMaster-Carr

Filter by

Detects

Toluene (Methylbenzene)

Measures

Ambient Temperature

Carbon Dioxide Level

Carbon Monoxide Level

Combustion Efficiency

Power Source

Environment

System of Measurement

Inch

Metric

Maximum Temperature

Less than 500° F

1,000° F to 1,999.9° F

Maximum Oxygen Volume Percent Concentration Measured

For Use On

For Use With

Hazardous Location Protection Type

Explosion Proof

Flameproof

Intrinsic Safety

Batteries Replaceable

Display Type

Depth

Minimum Temperature

REACH

Certification

C-UL Recognized Component

CE Marked

CSA Certified

CSA-US Certified

UL Recognized Component

Export Control Classification Number (ECCN)

1A995

EAR99

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

Batteries Included

Yes

RoHS

Compliant

Compliant with Exemptions

Not Compliant

DFARS Specialty Metals

Height

Battery Chemistry

Alert Type

Hazardous Location Rating

ATEX Hazardous Location Zone Rating

Ex Da Ia IIC T4 Ga

IEC Hazardous Location Rating

IECEx Ex Ia IIC T4

NEC Hazardous Location Rating

NEC Hazardous Location Zone (AEx) Rating

Pressure Numeric Increments

26 Products

Oxygen Detectors

When your work area has too much or too little oxygen, these detectors alert you with an audible alarm, warning light, and vibrating alarm. You can adjust the high and low alarm trigger points to suit your environment.

A calibration check must be performed on the detector before each use to verify that it is working properly. The check can be performed with the press of a button.

Detectors with Nonreplaceable Battery—The detector with a nonreplaceable battery should be thrown away at the end of its two-year lifespan.

	Oxygen Detectors												Batteries
	Oxygen Volume Percent Concentration Measured	Volume (Sound) @ Distance	Ht.	Wd.	Dp.	Temp. Range, ° F	Batteries Included	Battery Chemistry	Hazardous Location Rating	Enclosure Rating		Each	Pkg. Qty.		Pkg.
Detectors with Nonreplaceable Battery



		0% to 25%	95 dBA @ 30 cm	3 1/2"	2"	1"	-4 to 122	Yes	Lithium	NEC Class I Divisions 1, 2 Groups A, B, C, D NEC Class II Divisions 1, 2 Group G NEC Zone 0 Groups IIC, IIB, IIA IEC Zone 1 Groups IIC, IIB, IIA AEx Ia IIC T4 ATEX II 2 G Ex Ia IIC T4 Gb IECEx Ex Ia IIC T4	IP67	18995T81	0000000	—	———	0


		Detectors with Replaceable Battery



				0% to 25%	95 dBA @ 30 cm	3 1/2"	2"	1"	-4 to 122	Yes	Lithium	NEC Class I Divisions 1, 2 Groups A, B, C, D NEC Class II Divisions 1, 2 Group G NEC Zone 0 Groups IIC, IIB, IIA IEC Zone 0 Groups IIC, IIB, IIA AEx Ia IIC T4 ATEX II 1 G Ex Ia IIC T4 Ga ATEX II 2 G Ex Ia IIC T4 Gb IECEx Ex Ia IIC T4	—	18995T92	000000	1	7821K72	00000

Combustion Analyzers

These analyzers measure boiler and furnace combustion efficiency. They automatically calibrate to normal atmospheric oxygen.

	Measurement Range				Calculated Range
For Use On	Ambient Temp., ° F	Flue Gas Temp., ° F	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	-4 to 1,200	0% to 20.9%	0 to 2,000	0.1% to 100%	0% to 15%	0 to 9,999	0% to 250%	±0.3% of Oxygen Content	Yes	3937K35	0000000

Replacements for Combustion Analyzers


Replacement Oxygen Sensor	3937K37	Each	0000000
Replacement AA Batteries (Pkg. of 4)	71455K53	Pkg. of 4	0000

Portable Multi-Gas Detectors

When these detectors sense high levels of combustible and toxic gases, they alert you with an audible alarm, warning light, and vibrating alarm. You can adjust the alarm trigger points to suit your environment. There is also a motion sensor that sounds an alarm if the user becomes disabled.

A calibration check must be performed on detectors before each use to verify that they are working properly. The check requires a regulator and cylinder (sold separately).

Note: LEL is lower explosive limit.

Detects (Measuring Range)	Volume (Sound) @ Distance	Temp. Range, ° F	Batteries Included	Hazardous Location Rating	Enclosure Rating		Each
Acetone, Butane, Hydrogen, Methane, Pentane, Propane, Toluene (Methylbenzene) (0% to 100% LEL) Oxygen (0% to 30% Vol.) Carbon Monoxide (0 ppm to 1,999 ppm) Hydrogen Sulfide (0 ppm to 200 ppm)	95 dBA @ 30 cm	-40 to 140	Yes	NEC Class I Divisions 1, 2 Groups A, B, C, D NEC Class II Divisions 1, 2 Groups E, F, G NEC Class III Divisions 1, 2 NEC Zone 0 Groups IIC, IIB, IIA AEx Da Ia IIC T4 Ga Ex Da Ia IIC T4 Ga	IP68	18995T42	000000000

Accessories for Multi-Gas Detectors

		Each
Calibration Regulator	18995T916	0000000
Calibration Cylinder	18995T47	000000
Calibration Tubing	18995T935	00000

Portable Multi-Gas Detectors with Probe

Use the probe on these detectors to test the air in a hazardous area before entering. Great for confined spaces. Detectors alert you with an audible alarm, warning light, and vibrating alarm in the presence of combustible and toxic gases. You can adjust the alarm trigger points to suit your environment. There is also a motion sensor that sounds an alarm if the user becomes disabled.

A calibration check must be performed on these detectors before each use to verify that they are working properly. The check requires a regulator and cylinder (sold separately).

Note: LEL is lower explosive limit.

Detects (Measuring Range)	Volume (Sound) @ Distance	Temp. Range, ° F	Batteries Included	Includes	Tube Lg., ft.	Hazardous Location Rating	Enclosure Rating		Each
Acetone, Butane, Hydrogen, Methane, Pentane, Propane, Toluene (Methylbenzene) (0% to 100% LEL) Oxygen (0% to 30% Vol.) Carbon Monoxide (0 ppm to 1,999 ppm) Hydrogen Sulfide (0 ppm to 200 ppm)	95 dBA @ 30 cm	-40 to 140	Yes	Sampling Probe, Tubing Assembly, Battery	25	NEC Class I Divisions 1, 2 Groups A, B, C, D NEC Class II Divisions 1, 2 Groups E, F, G NEC Class III Divisions 1, 2 NEC Zone 0 Groups IIC, IIB, IIA AEx Da Ia IIC T4 Ga Ex Da Ia IIC T4 Ga	IP68	18995T44	000000000

Accessories and Replacements for Multi-Gas Detectors

		Each
Replacement Sampling Probe	18995T28	0000000
Calibration Regulator	18995T916	000000
Calibration Cylinder	18995T47	000000
Replacement 25-ft.Tubing Assembly	18995T26	000000

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.

Brass Case with Brass Connection—Single Scale (Pounds per Square Inch)


Bottom Connection	Bottom Connection

Gauges with brass case are cleaned to meet ASME B40.1, Level IV for oxygen service.

			Temp. Range, ° F					Bottom Connection
	Dial Dia.	Pipe Size	Environment	Process	For Use With	Accuracy	Choose a Pressure Range		Each
Upright Mount







				NPT Male

				2"	1/4	-40 to 140	-40 to 140	Acetylene Air Carbon Dioxide Oxygen	±2% Midscale (Grade B)	0 to 30 psi, 0 to 60 psi, 0 to 100 psi, 0 to 200 psi, 0 to 400 psi, 0 to 600 psi, 0 to 1,000 psi, 0 to 2,000 psi, 0 to 3,000 psi, 0 to 4,000 psi	32255K7	000000


				2 1/2"	1/4	-40 to 140	-40 to 140	Acetylene Air Carbon Dioxide Oxygen	±2% Midscale (Grade B)	0 to 30 psi, 0 to 60 psi, 0 to 100 psi, 0 to 200 psi, 0 to 400 psi, 0 to 600 psi, 0 to 1,000 psi, 0 to 2,000 psi, 0 to 3,000 psi, 0 to 4,000 psi	32255K6	00000

304 Stainless Steel Case with Brass Connection—Dual Scale (Pounds per Square Inch, Kilopascals)


Bottom Connection	Center-Back Connection	Lower-Back Connection


Bottom Connection	Center-Back Connection

Lower-Back Connection

Gauges with 304 stainless steel case are cleaned and bagged to meet ASME B40.1, Level IV for oxygen service.

			Temp. Range, ° F					Bottom Connection		Center-Back Connection		Lower-Back Connection
	Dial Dia.	Pipe Size	Environment	Process	For Use With	Accuracy	Choose a Pressure Range		Each		Each		Each
Upright Mount







				NPT Male

				2 1/2"	1/4	-40 to 140	-40 to 140	Oxygen	±1% Midscale (Grade A)	0 to 15 psi/0 to 102 kPa; 0 to 30 psi/0 to 205 kPa; 0 to 100 psi/0 to 680 kPa; 0 to 200 psi/0 to 1,350 kPa; 0 to 300 psi/0 to 2,050 kPa; 0 to 600 psi/0 to 4,100 kPa	9816T11	000000	9816T21	000000	———	0


				4"	1/4	-40 to 140	-40 to 140	Oxygen	±1% Full Scale (Grade 1A)	0 to 15 psi/0 to 103 kPa; 0 to 30 psi/0 to 206 kPa; 0 to 100 psi/0 to 680 kPa; 0 to 200 psi/0 to 1,360 kPa; 0 to 300 psi/0 to 2,060 kPa; 0 to 600 psi/0 to 4,100 kPa	9816T12	000000	———	0	9816T22	0000000

Pressure Transmitters for Oxygen

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 an output current, 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.

4 mA to 20 mA Output Signal—Wire Lead Connection

Image of Product. Front orientation. Contains Annotated. Pressure Transmitters. Pressure Transmitters for Oxygen.

Input Voltage, V DC	Ht.	Wd.	Enclosure Rating	Certification	For Use With	Accuracy	Housing Material	Connection Material	Temp. Range, ° F		Each







1/4 NPT Male Pipe Connection

0 to 30	60	60	9 to 36	2 3/8"	1 5/16"	IP65, NEMA 4X	UL Recognized Component, C-UL Recognized Component, CE Marked	Oxygen	±1.0%	Glass-Filled Nylon	304 Stainless Steel	-40 to 255	3914A11	0000000


0 to 60	120	120	9 to 36	2 3/8"	1 5/16"	IP65, NEMA 4X	UL Recognized Component, C-UL Recognized Component, CE Marked	Oxygen	±1.0%	Glass-Filled Nylon	304 Stainless Steel	-40 to 255	3914A12	000000
0 to 100	200	200	9 to 36	2 3/8"	1 5/16"	IP65, NEMA 4X	UL Recognized Component, C-UL Recognized Component, CE Marked	Oxygen	±1.0%	Glass-Filled Nylon	304 Stainless Steel	-40 to 255	3914A13	000000
0 to 300	600	600	9 to 36	2 3/8"	1 5/16"	IP65, NEMA 4X	UL Recognized Component, C-UL Recognized Component, CE Marked	Oxygen	±1.0%	Glass-Filled Nylon	304 Stainless Steel	-40 to 255	3914A14	000000
0 to 500	1,000	1,000	9 to 36	2 3/8"	1 5/16"	IP65, NEMA 4X	UL Recognized Component, C-UL Recognized Component, CE Marked	Oxygen	±1.0%	Glass-Filled Nylon	304 Stainless Steel	-40 to 255	3914A15	000000
0 to 1,000	2,000	2,000	9 to 36	2 3/8"	1 5/16"	IP65, NEMA 4X	UL Recognized Component, C-UL Recognized Component, CE Marked	Oxygen	±1.0%	Glass-Filled Nylon	304 Stainless Steel	-40 to 255	3914A16	000000
0 to 1,500	3,000	3,000	9 to 36	2 3/8"	1 5/16"	IP65, NEMA 4X	UL Recognized Component, C-UL Recognized Component, CE Marked	Oxygen	±1.0%	Glass-Filled Nylon	304 Stainless Steel	-40 to 255	3914A17	000000