Ethanol Gauges | McMaster-Carr

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Connection Location

Maximum Pressure

1,000 psi to 1,999.9 psi

2,000 psi to 9,999.9 psi

10,000 psi to 19,999.9 psi

Dial Type

Liquid Filled

For Use With

118° Drills

Acid Gas

Alcohol-Based Solvents

Printed Circuit Boards

Stems with Clamping Nut

Surfaces

Taps

Thermocouple Connection Heads

Acetic Acid (White Vinegar)

Argon/Carbon Dioxide Blend

Hydraulic Fluid (Petroleum Based)

Sodium Bicarbonate (Baking Soda)

Sodium Hydroxide (Caustic Soda)

Sodium Hypochlorite (Bleach)

Pipe Size

Pressure Numeric Increments

Dial Diameter

Scale Type

Thread Type

Graduations

Display Type

Measures

Measurement Unit

Pounds per Square Inch

Case Material

Brass

Certificate Type

Calibration Certificate Traceable to NIST

Accuracy Scale

Liquid Type

Fitting Connection

Minimum Pressure

Gender

Material

REACH

RoHS

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

Yes

Export Control Classification Number (ECCN)

EAR99

DFARS Specialty Metals

Exempt

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193 Products

About Pressure Gauges

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

About Pipe Size

Single Scale With Lower Back Connection

Single Scale With Bottom Connection

Single Scale With Center Back Connection

Center Back Connection

Bottom Connection

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.

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 Calibration Certificate Traceable to NIST
2 1/2"	1/4	0° to 140°	0° to 140°	Glycerin	Upright	3481K11	0000000
4"	1/4	0° to 140°	0° to 140°	Glycerin	Upright	3481K12	000000
Center Back Connection
NPT Male Calibration Certificate Traceable to NIST
2 1/2"	1/4	0° to 140°	0° to 140°	Glycerin	Upright	3481K21	000000
Lower Back Connection
NPT Male Calibration Certificate Traceable to NIST
4"	1/4	0° to 140°	0° to 140°	Glycerin	Upright	3481K22	000000

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.

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	3842K11	0000000
NPT Male with Calibration Certificate Traceable to NIST
2 1/2"	1/4	0° to 140°	0° to 140°	Glycerin	Upright	3842K31	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	3842K21	0000000
NPT Male with Calibration Certificate Traceable to NIST
2 1/2"	1/4	0° to 140°	0° to 140°	Glycerin	Upright	3842K41	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"	3842K81	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"	3842K83	000000

Chemical-Resistant Vertical-Mount Liquid-Level Gauges for Tanks

With a stainless steel float and float rod, these gauges resist corroding from chemicals. Their indicator moves up as your tank fills. Check the indicator against the graduation marks to see how full your tank is and if you need to fill or drain it. Plastic protects the indicator's movement, saving you from inaccurate readings.

Alarms can be set to flash and sound at levels critical to your system.

Remote-reading displays let you check readings from up to 100 ft. away. They have an alarm that sounds when the level is too high or too low.

Gauges

Gauge

			Temp. Range, °F
For Tank Dp.	Max. Pressure, psi	Window Ht.	Min.	Max.	Float Material	Graduation Marks	Window Material		Each
1 1/2 NPT Male
316 Stainless Steel Float Rod
12"	70	3"	-50°	400°	316 Stainless Steel	Full, 7/8, 3/4, 5/8, 1/2, 3/8, 1/4, 1/8, Empty	Plastic	3894N11	0000000
20"	70	3"	-50°	400°	316 Stainless Steel	Full, 7/8, 3/4, 5/8, 1/2, 3/8, 1/4, 1/8, Empty	Plastic	3894N12	000000
24"	70	3"	-50°	400°	316 Stainless Steel	Full, 7/8, 3/4, 5/8, 1/2, 3/8, 1/4, 1/8, Empty	Plastic	3894N13	000000
30"	70	3"	-50°	400°	316 Stainless Steel	Full, 7/8, 3/4, 5/8, 1/2, 3/8, 1/4, 1/8, Empty	Plastic	3894N14	000000
36"	70	3"	-50°	400°	316 Stainless Steel	Full, 7/8, 3/4, 5/8, 1/2, 3/8, 1/4, 1/8, Empty	Plastic	3894N15	000000
48"	70	3"	-50°	400°	316 Stainless Steel	Full, 7/8, 3/4, 5/8, 1/2, 3/8, 1/4, 1/8, Empty	Plastic	3894N16	000000
2 NPT Male
316 Stainless Steel Float Rod
12"	70	3"	-50°	400°	316 Stainless Steel	Full, 7/8, 3/4, 5/8, 1/2, 3/8, 1/4, 1/8, Empty	Plastic	3894N17	000000
20"	70	3"	-50°	400°	316 Stainless Steel	Full, 7/8, 3/4, 5/8, 1/2, 3/8, 1/4, 1/8, Empty	Plastic	3894N18	000000
24"	70	3"	-50°	400°	316 Stainless Steel	Full, 7/8, 3/4, 5/8, 1/2, 3/8, 1/4, 1/8, Empty	Plastic	3894N19	000000
30"	70	3"	-50°	400°	316 Stainless Steel	Full, 7/8, 3/4, 5/8, 1/2, 3/8, 1/4, 1/8, Empty	Plastic	3894N21	000000
36"	70	3"	-50°	400°	316 Stainless Steel	Full, 7/8, 3/4, 5/8, 1/2, 3/8, 1/4, 1/8, Empty	Plastic	3894N22	000000
42"	70	3"	-50°	400°	316 Stainless Steel	Full, 7/8, 3/4, 5/8, 1/2, 3/8, 1/4, 1/8, Empty	Plastic	3894N23	000000
48"	70	3"	-50°	400°	316 Stainless Steel	Full, 7/8, 3/4, 5/8, 1/2, 3/8, 1/4, 1/8, Empty	Plastic	3894N24	000000
60"	70	3"	-50°	400°	316 Stainless Steel	Full, 7/8, 3/4, 5/8, 1/2, 3/8, 1/4, 1/8, Empty	Plastic	3894N25	000000

Alarms

Direct-Mount Alarm Shown with Gauge (Sold Separately)

Remote-Mount Alarm Shown with Gauge (Sold Separately)

		Light
Cord Length, ft.	Signal Type	Color	Pattern	No. of	Bulb Type	Volume	Housing Material	Batteries Included		Each
Direct Mount
__	Audible Alarm, Signal Light	Red	Flashing	1	LED	110 dB	ABS Plastic	No	3711K153	0000000
Remote Mount
25	Audible Alarm, Signal Light	Red	Flashing	1	LED	110 dB	ABS Plastic	No	3711K148	000000
50	Audible Alarm, Signal Light	Red	Flashing	1	LED	110 dB	ABS Plastic	No	3711K149	000000
75	Audible Alarm, Signal Light	Red	Flashing	1	LED	110 dB	ABS Plastic	No	3711K151	000000
100	Audible Alarm, Signal Light	Red	Flashing	1	LED	110 dB	ABS Plastic	No	3711K152	000000

Remote-Reading Displays

Remote-Reading Display Shown with Gauge (Sold Separately)

			Light
Cord Length, ft.	Signal Type	Display Type	Color	Indicator Display Type	No. of	Volume	Housing Material	Batteries Included		Each
25	Audible Alarm	Light Indicator	Green/Red/Yellow	LED	9	0 dB, 90 dB, 100 dB	ABS Plastic	No	3711K144	0000000
50	Audible Alarm	Light Indicator	Green/Red/Yellow	LED	9	0 dB, 90 dB, 100 dB	ABS Plastic	No	3711K145	000000
75	Audible Alarm	Light Indicator	Green/Red/Yellow	LED	9	0 dB, 90 dB, 100 dB	ABS Plastic	No	3711K146	000000
100	Audible Alarm	Light Indicator	Green/Red/Yellow	LED	9	0 dB, 90 dB, 100 dB	ABS Plastic	No	3711K147	000000