Ammonia Pressure Gauges | McMaster-Carr

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129 Products

About Pressure Gauges

About Pipe Size

Bottom Connection

These gauges have a glycerin-filled dial that reduces needle flutter for precise readings in high-vibration applications reaching 2,000 psi. A 316 stainless steel guard, also known as an isolator, protects the gauge from damage caused by corrosive chemicals. Use them with pumps, filters, regulators, and in process lines to measure and display pressure.

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

304 Stainless Steel Case with 316 Stainless Steel Connection—Dual Scale (psi, kPa)

For Use With: Air, Water, Hydraulic Fluid, Ammonia, Bleach, Boric Acid, Gasoline, Diesel Fuel, and Natural Gas
Accuracy: ±1.6% Full Scale (Not Graded)

Available Pressure Gauges
Pressure Range		Graduation Marks		Numeric Increments
psi	kPa	psi	kPa	psi	kPa
2 1/2" Dial Diameter
0 to 15	0 to 100	0.2	2	3	20
0 to 30	0 to 200	0.5	5	5	50
0 to 60	0 to 400	1	10	10	100
0 to 100	0 to 700	2	10	20	100
0 to 160	0 to 1,100	2	20	20	200
0 to 200	0 to 1,400	5	20	40	200
0 to 300	0 to 2,000	5	50	50	400
0 to 400	0 to 2,800	10	100	50	500
0 to 600	0 to 4,000	10	100	100	1,000
0 to 1,000	0 to 7,000	20	100	200	1,000
0 to 2,000	0 to 14,000	50	200	400	2,000
4" Dial Diameter
0 to 15	0 to 100	0.1	2	2	20
0 to 30	0 to 200	0.5	5	5	50
0 to 60	0 to 400	1	10	10	100
0 to 100	0 to 700	2	10	20	100
0 to 160	0 to 1,100	2	20	20	200
0 to 200	0 to 1,400	5	50	50	200
0 to 300	0 to 2,000	5	50	50	500
0 to 400	0 to 2,800	10	100	50	500
0 to 600	0 to 4,000	10	100	100	800
0 to 1,000	0 to 7,000	20	100	200	1,000
0 to 2,000	0 to 14,000	50	200	400	2,000

						Bottom Connection
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Guard Material	Mounting Orientation		Each
NPT Female
2 1/2"	1/4	35° to 140°	0° to 210°	316 Stainless Steel	Any	000000	0000000
2 1/2"	1/2	35° to 140°	0° to 210°	316 Stainless Steel	Any	000000	000000
4"	1/4	35° to 140°	0° to 210°	316 Stainless Steel	Any	000000	000000
4"	1/2	35° to 140°	0° to 210°	316 Stainless Steel	Any	000000	000000

Low-Pressure Gauges for Chemicals

With 316 Stainless Steel Guard

Bottom Connection (Steel Guard)

A plastic or stainless steel guard, also known as an isolator, protects the gauge from damage caused by corrosive chemicals. Use them with pumps, filters, regulators, and in process lines to measure and display pressures.

Polypropylene and 316 stainless steel guards are more chemical resistant than PVC and CPVC guards.

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

304 Stainless Steel Case with 316 Stainless Steel Connection—Dual Scale (psi, kPa)

For Use With: Air, Water, Hydraulic Fluid, Ammonia, Bleach, Boric Acid, Gasoline, Diesel Fuel, and Natural Gas
Accuracy: ±1.6% Full Scale (Not Graded)

Available Pressure Ranges
Pressure Range		Graduation Marks		Numeric Increments
psi	kPa	psi	kPa	psi	kPa
2 1/2" Dial Diameter
0 to 15	0 to 100	0.2	2	3	20
0 to 30	0 to 200	0.5	5	5	50
0 to 60	0 to 400	1	10	10	100
0 to 100	0 to 700	2	10	20	100
0 to 160	0 to 1,100	2	20	20	200
4" Dial Diameter
0 to 15	0 to 100	0.1	2	2	20
0 to 30	0 to 200	0.5	5	5	50
0 to 60	0 to 400	1	10	10	100
0 to 100	0 to 700	2	10	20	100
0 to 160	0 to 1,100	2	20	20	200

						Bottom Connection
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Mounting Orientation	Guard Material		Each
NPT Female
2 1/2"	1/4	-40° to 140°	0° to 210°	Any	316 Stainless Steel	0000000	0000000
2 1/2"	1/2	-40° to 140°	0° to 210°	Any	316 Stainless Steel	0000000	000000
4"	1/4	-40° to 140°	0° to 210°	Any	316 Stainless Steel	0000000	000000
4"	1/2	-40° to 140°	0° to 210°	Any	316 Stainless Steel	0000000	000000

High-Pressure Gauges for Chemicals

Bottom Connection

A 316 stainless steel guard, also known as an isolator, protects the gauge from damage caused by corrosive chemicals. Gauges are commonly used with pumps, filters, regulators, and in process lines to measure and display pressures up to 2,000 psi.

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

304 Stainless Steel Case with 316 Stainless Steel Connection—Dual Scale (psi, kPa)

For Use With: Air, Water, Hydraulic Fluid, Ammonia, Bleach, Boric Acid, Gasoline, Diesel Fuel, and Natural Gas
Accuracy: ±1.6% Full Scale (Not Graded)

Pressure Range		Graduation Marks		Numeric Increments
psi	kPa	psi	kPa	psi	kPa
2 1/2" Dial Diameter
0 to 200	0 to 1,400	5	20	40	200
0 to 300	0 to 2,000	5	50	50	400
0 to 400	0 to 2,800	5	50	50	500
0 to 600	0 to 4,000	10	100	100	1,000
0 to 1,000	0 to 7,000	20	100	200	1,000
0 to 2,000	0 to 14,000	50	200	400	2,000
4" Dial Diameter
0 to 200	0 to 1,400	5	50	50	200
0 to 300	0 to 2,000	5	50	50	500
0 to 400	0 to 2,800	5	50	50	500
0 to 600	0 to 4,000	10	100	100	800
0 to 1,000	0 to 7,000	20	100	200	1,000
0 to 2,000	0 to 14,000	50	200	400	2,000

						Bottom Connection
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Guard Material	Mounting Orientation		Each
NPT Female
2 1/2"	1/4	-40° to 140°	0° to 210°	316 Stainless Steel	Any	000000	0000000
2 1/2"	1/2	-40° to 140°	0° to 210°	316 Stainless Steel	Any	000000	000000
4"	1/4	-40° to 140°	0° to 210°	316 Stainless Steel	Any	000000	000000
4"	1/2	-40° to 140°	0° to 210°	316 Stainless Steel	Any	000000	000000

Refrigeration Pressure and Vacuum Gauges

Bottom Connection

Often used with chillers and in refrigeration systems, these gauges display the temperature of ammonia relative to the pressure measurement. Also known as compound gauges, these measure both pressure and vacuum.

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

304 Stainless Steel Case with 316 Stainless Steel Connection—Dual Scale (psi/in. of Hg, Fahrenheit)

For Use With: Air, Ammonia, and Refrigerant
Accuracy: ±1.6% Full Scale (Grade B)

Available Pressure and Vacuum Ranges
		Graduation Marks		Numeric Increments
Pressure Range, psi	Vacuum Range, in. of Hg	psi	in. of Hg	psi	in. of Hg	Display Temp. Range, °F
0 to 150	30 to 0	5	5	20	30	-60° to 84°
0 to 300	30 to 0	5	5	25	30	-60° to 125°

				Bottom Connection
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F		Each
NPT Male
2 1/2"	1/4	-40° to 200°	-40° to 250°	0000000	000000
4"	1/4	-40° to 200°	-40° to 250°	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	Yes	00000000	0000000
Remote Mount
25	Audible Alarm, Signal Light	Red	Flashing	1	LED	110 dB	ABS Plastic	Yes	00000000	000000
50	Audible Alarm, Signal Light	Red	Flashing	1	LED	110 dB	ABS Plastic	Yes	00000000	000000
75	Audible Alarm, Signal Light	Red	Flashing	1	LED	110 dB	ABS Plastic	Yes	00000000	000000
100	Audible Alarm, Signal Light	Red	Flashing	1	LED	110 dB	ABS Plastic	Yes	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	Yes	00000000	0000000
50	Audible Alarm	Light Indicator	Green/Red/Yellow	LED	9	0 dB, 90 dB, 100 dB	ABS Plastic	Yes	00000000	000000
75	Audible Alarm	Light Indicator	Green/Red/Yellow	LED	9	0 dB, 90 dB, 100 dB	ABS Plastic	Yes	00000000	000000
100	Audible Alarm	Light Indicator	Green/Red/Yellow	LED	9	0 dB, 90 dB, 100 dB	ABS Plastic	Yes	00000000	000000

Email Us

About Pressure Gauges

About Pipe Size

Vibration-Resistant Pressure Gauges for Chemicals

Low-Pressure Gauges for Chemicals

High-Pressure Gauges for Chemicals

Refrigeration Pressure and Vacuum Gauges

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