Ethanol Indicators | McMaster-Carr

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About Pipe Size

About Pressure Gauges

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.

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, 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	0000000	0000000
4"	1/4	0° to 140°	0° to 140°	Glycerin	Upright	0000000	000000
Center Back Connection
NPT Male Calibration Certificate Traceable to NIST
2 1/2"	1/4	0° to 140°	0° to 140°	Glycerin	Upright	0000000	000000
Lower Back Connection
NPT Male Calibration Certificate Traceable to NIST
4"	1/4	0° to 140°	0° to 140°	Glycerin	Upright	0000000	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.

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

Gauge Guards

316 Stainless Steel Guard

316 Stainless Steel Guard With Drain Port

Also known as isolators or diaphragm seals, these protect gauges from corrosive process media. Fill guards with hydraulic oil (not included) before use.

316 stainless steel guards provide excellent corrosion and chemical resistance and can handle higher temperatures and pressures than plastic guards.

Guards with drain port allow you to remove process media.

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

Pipe Connections
Inlet	Outlet	Gasket Material	For Use With	Min. Pressure, psi	Max. Pressure	Max. Temp., °F	Ht.		Each
316 Stainless Steel Body
1/4 NPT Female	1/4 NPT Female	316 Stainless Steel	Acetylene, Air, Ammonia, Argon, Bleach, Boric Acid, Carbon Dioxide, Deionized Water, Diesel Fuel, Ethanol, Ethyl Alcohol, Gasoline, Hydraulic Fluid, Hydraulic Oil, Hydrogen, Liquid Nitrogen, Mineral Oil, Natural Gas, Nitrogen, Oxygen, Refrigerant, Salt Water, Steam, Water	60	2,500 psi @ 72° F	300°	1 3/4"	0000000	0000000
1/2 NPT Female	1/4 NPT Female	316 Stainless Steel	Acetylene, Air, Ammonia, Argon, Bleach, Boric Acid, Carbon Dioxide, Deionized Water, Diesel Fuel, Ethanol, Ethyl Alcohol, Gasoline, Hydraulic Fluid, Hydraulic Oil, Hydrogen, Liquid Nitrogen, Mineral Oil, Natural Gas, Nitrogen, Oxygen, Refrigerant, Salt Water, Steam, Water	60	2,500 psi @ 72° F	300°	1 3/4"	0000000	000000
1/2 NPT Female	1/2 NPT Female	316 Stainless Steel	Acetylene, Air, Ammonia, Argon, Bleach, Boric Acid, Carbon Dioxide, Deionized Water, Diesel Fuel, Ethanol, Ethyl Alcohol, Gasoline, Hydraulic Fluid, Hydraulic Oil, Hydrogen, Liquid Nitrogen, Mineral Oil, Natural Gas, Nitrogen, Oxygen, Refrigerant, Salt Water, Steam, Water	60	2,500 psi @ 72° F	300°	1 1/2"	0000000	000000
316 Stainless Steel Body with 1/4 NPT Female Drain Port
1/4 NPT Female	1/4 NPT Female	316 Stainless Steel	Acetylene, Air, Ammonia, Argon, Bleach, Boric Acid, Carbon Dioxide, Deionized Water, Diesel Fuel, Ethanol, Ethyl Alcohol, Gasoline, Hydraulic Fluid, Hydraulic Oil, Hydrogen, Liquid Nitrogen, Mineral Oil, Natural Gas, Nitrogen, Oxygen, Refrigerant, Salt Water, Steam, Water	60	2,500 psi @ 72° F	300°	2"	0000000	000000
1/2 NPT Female	1/4 NPT Female	316 Stainless Steel	Acetylene, Air, Ammonia, Argon, Bleach, Boric Acid, Carbon Dioxide, Deionized Water, Diesel Fuel, Ethanol, Ethyl Alcohol, Gasoline, Hydraulic Fluid, Hydraulic Oil, Hydrogen, Liquid Nitrogen, Mineral Oil, Natural Gas, Nitrogen, Oxygen, Refrigerant, Salt Water, Steam, Water	60	2,500 psi @ 72° F	300°	2"	0000000	000000
1/2 NPT Female	1/2 NPT Female	316 Stainless Steel	Acetylene, Air, Ammonia, Argon, Bleach, Boric Acid, Carbon Dioxide, Deionized Water, Diesel Fuel, Ethanol, Ethyl Alcohol, Gasoline, Hydraulic Fluid, Hydraulic Oil, Hydrogen, Liquid Nitrogen, Mineral Oil, Natural Gas, Nitrogen, Oxygen, Refrigerant, Salt Water, Steam, Water	60	2,500 psi @ 72° F	300°	2"	0000000	000000

Sanitary Gauge Guards

Keeping corrosive substances from touching pressure gauges used in food-processing and pharmaceutical plants, these guards have a sanitary design. Made of 316 stainless steel, they won’t rust from frequent washdowns with harsh cleaners and sanitizers. They have continuously-welded seams and polished surfaces, so there aren’t any pits for bacteria to grow in. Removing them for cleaning and maintenance is easy thanks to their quick-clamp connection, which is sometimes called a tri-clamp.

Also known as isolators and diaphragm seals, these guards have a 316 stainless steel gasket to shield the pressure gauges from corrosion. Before use, fill the guards with fluid such as glycerin or silicone that’s suitable for food contact.

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

	Outlet Quick-Clamp Tube Connection
Inlet Pipe Connection	For Tube OD	Flange OD	Gasket Material	For Use With	Minimum Pressure, psi	Maximum Pressure	Maximum Temperature	Height	Interior Smoothness, Ra		Each
316 Stainless Steel Body
1/4 NPT Female	1 1/2"	1.984"	316 Stainless Steel	Acetylene, Air, Ammonia, Beverage, Boric Acid, Carbon Dioxide, Diesel Fuel, Ethanol, Food, Gasoline, Hydraulic Fluid, Hydrogen, Oxygen, Pharmaceuticals, Wastewater, Water	30	Not Rated	Not Rated	1 3/8"	32	0000000	0000000
1/4 NPT Female	2"	2.516"	316 Stainless Steel	Acetylene, Air, Ammonia, Beverage, Boric Acid, Carbon Dioxide, Diesel Fuel, Ethanol, Food, Gasoline, Hydraulic Fluid, Hydrogen, Oxygen, Pharmaceuticals, Wastewater, Water	30	Not Rated	Not Rated	1 1/8"	32	0000000	000000
1/2 NPT Female	1 1/2"	1.984"	316 Stainless Steel	Acetylene, Air, Ammonia, Beverage, Boric Acid, Carbon Dioxide, Diesel Fuel, Ethanol, Food, Gasoline, Hydraulic Fluid, Hydrogen, Oxygen, Pharmaceuticals, Wastewater, Water	30	Not Rated	Not Rated	1 3/8"	32	0000000	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.

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

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	0000000	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	0000000	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	0000000	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	0000000	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	0000000	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	0000000	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	0000000	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	0000000	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	0000000	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	0000000	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	0000000	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	0000000	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	0000000	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	0000000	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	00000000	0000000
Remote Mount
25	Audible Alarm, Signal Light	Red	Flashing	1	LED	110 dB	ABS Plastic	No	00000000	000000
50	Audible Alarm, Signal Light	Red	Flashing	1	LED	110 dB	ABS Plastic	No	00000000	000000
75	Audible Alarm, Signal Light	Red	Flashing	1	LED	110 dB	ABS Plastic	No	00000000	000000
100	Audible Alarm, Signal Light	Red	Flashing	1	LED	110 dB	ABS Plastic	No	00000000	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	00000000	0000000
50	Audible Alarm	Light Indicator	Green/Red/Yellow	LED	9	0 dB, 90 dB, 100 dB	ABS Plastic	No	00000000	000000
75	Audible Alarm	Light Indicator	Green/Red/Yellow	LED	9	0 dB, 90 dB, 100 dB	ABS Plastic	No	00000000	000000
100	Audible Alarm	Light Indicator	Green/Red/Yellow	LED	9	0 dB, 90 dB, 100 dB	ABS Plastic	No	00000000	000000