Oz./In.2 Gauges | McMaster-Carr

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43 Products

About Pressure Gauges

Find a gauge with the right connection material and dial type—many with traceable calibration certificates.

High-Accuracy Low-Pressure Gauges

Single Scale With Center Back Connection

Dual Scale With Bottom Connection (Flange Mount)

Bottom Connection

Center Back Connection

Bottom Connection (Flange Mount)

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.

Gauges with safety case blow out in the back under excess pressure, protecting the operator in front.

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	4026K23	000000	4026K45	000000
NPT Male with Calibration Certificate Traceable to NIST
2 1/2"	1/4	0° to 140°	0° to 140°	Black	Upright	4026K36	000000	4026K55	000000

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	4269K3	0000000

Polyester Plastic Case with Brass Connection—Dual Scale (in. of H₂O, oz./in.²)

For Use With: Air, Argon, Nitrogen, and Natural Gas
Accuracy: ±1% Mid Scale (Grade A)

Available Pressure Ranges
Pressure Range		Graduation Marks		Numeric Increments
in. of H₂O	oz./in.²	in. of H₂O	oz./in.²	in. of H₂O	oz./in.²
0 to 10	0 to 6	0.1	0.1	1	1
0 to 15	0 to 9	0.2	0.1	3	1
0 to 20	0 to 12	0.2	0.1	2	1
0 to 30	0 to 18	0.2	0.2	5	2
0 to 40	0 to 24	0.5	0.2	5	2
0 to 60	0 to 35	1	0.5	10	5
0 to 80	0 to 45	1	0.5	10	5
0 to 100	0 to 57	1	1	10	10
0 to 150	0 to 90	2	1	30	10

					Mounting					Bottom Connection (Flange Mount)
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Case Color	Orientation	Fasteners Included	Hole Dia.	No. of Holes	Features		Each
NPT Male
4 1/2"	1/4	0° to 140°	-40° to 210°	Black	Upright	No	1/4"	3	Safety Case	4221K2	0000000