In. Of H2O Gauges | McMaster-Carr

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	Scale Scale	Show

in. of H2O

	Scale Scale	Hide

	For Use With For Use With

	Display Type Display Type


Dial	Digital

U-Tube	Inclined Scale

	Dial Type Dial Type

	Dry

	Pipe Size Pipe Size

1/8

1/4

	Thread Type Thread Type

BSPP

NPT

	Measures Measures

Differential Pressure

Differential Vacuum

Pressure

Vacuum

	Connection Location Connection Location

	Bottom		Center Back

	Scale Type Scale Type


Single	Dual

	System of Measurement System of Measurement

Inch

	Dial Diameter Dial Diameter

2 1/2"

4 1/2"

	Case Material Case Material

	Connection Material Connection Material

	Gender Gender

Male

Female

	Connection Style Connection Style

Threaded

Barbed

Compression

	Accuracy Grade Accuracy Grade

Not Graded

	Maximum Process Temperature Maximum Process Temperature

	Maximum Pressure, in. of H2O Maximum Pressure, in. of H2O

	Lens Material Lens Material

Plastic

Glass

	Connection Type Connection Type


Pipe	Tube

	Accuracy Scale Accuracy Scale

Mid Scale

Full Scale

	Maximum Pressure Maximum Pressure

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

RoHS Compliant with
Exemptions

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

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65 Products

About Pressure Gauges

About Pipe Size

About Pressure Transmitters

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.

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

Painted Steel Case with Brass Connection—Single Scale (in. of H₂O)

For Use With: Air, Water, Hydraulic Fluid, Carbon Dioxide, and Natural Gas
Accuracy: ±1.5% Full Scale (Not Graded)

Available Pressure Gauges
Pressure Range, in. of H₂O	Graduation Marks, in. of H₂O	Numeric Increments, in. of H₂O
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
0 to 200	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	0000000	000000	0000000	000000
NPT Male with Calibration Certificate Traceable to NIST
2 1/2"	1/4	0° to 140°	0° to 140°	Black	Upright	0000000	000000	0000000	000000

304 Stainless Steel Case with Brass Connection—Single Scale (in. of H₂O)

For Use With: Air, Water, Hydraulic Fluid, Carbon Dioxide, and Natural Gas
Accuracy: ±1% Full Scale (Grade 1A)

Available Pressure Gauges
Pressure Range, in. of H₂O	Graduation Marks, in. of H₂O	Numeric Increments, in. of H₂O
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	2	20
0 to 200	4	40

					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	000000	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	000000	0000000

Ultra-Low Vacuum Gauges

Bottom Connection

Accommodate applications with very low vacuum with these gauges. Use them with vacuum pumps, packaging equipment, and in suction lines to measure and display vacuum.

Gauges with 304 stainless steel case have better corrosion resistance than gauges with steel case.

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

Painted Steel Case with Brass Connection—Single Scale (in. of H₂O)

For Use With: Air
Accuracy: ±1.6% Full Scale (Not Graded)

Available Vacuum Ranges
Vacuum Range, in. of H₂O	Graduation Marks, in. of H₂O	Numeric Increments, in. of H₂O
-100 to 0	2	20
-60 to 0	1	10
-30 to 0	0.5	5
-15 to 0	0.2	3

					Bottom Connection
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Case Color		Each
NPT Male
2 1/2"	1/4	0° to 140°	0° to 175°	Black	000000	000000
NPT Male with Calibration Certificate Traceable to NIST
2 1/2"	1/4	0° to 140°	0° to 175°	Black	000000	000000

304 Stainless Steel Case with Brass Connection—Single Scale (in. of H₂O)

For Use With: Air
Accuracy: ±1% Full Scale (Not Graded)

Available Vacuum Ranges
Vacuum Range, in. of H₂O	Graduation Marks, in. of H₂O	Numeric Increments, in. of H₂O
-100 to 0	2	20
-60 to 0	1	10
-30 to 0	0.5	5
-15 to 0	0.2	3

				Bottom Connection
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F		Each
NPT Male
4"	1/4	0° to 140°	0° to 175°	000000	0000000
NPT Male with Calibration Certificate Traceable to NIST
4"	1/4	0° to 140°	0° to 175°	000000	000000

Low-Pressure Differential Gauges with Dial Indicator

Measure small changes in air pressure with these gauges. They are commonly used to indicate clogged filters and to monitor fans and blowers.

Service these gauges without removing them using air filter kits. Kits include two vent valves for releasing air.

Surface mounting brackets allow gauges to be quickly installed on any flat surface. L mounting brackets can be carried to wherever you need to take a pressure reading. They can stand alone or be hung. Wraparound mounting brackets make it easy to service tubing, and don’t require cutting a hole in the wall.

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

Aluminum Case with Aluminum Connections—Single Scale (in. of H₂O)

For Use With: Air
Accuracy: ±2% Full Scale (Not Graded); except
0" to 0.25" in. of H₂O: ±4% Full Scale (Not Graded)
0" to 0.5" in. of H₂O: ±3% Full Scale (Not Graded)

Available Pressure Ranges
Pressure Range, in. of H₂O	Graduation Marks, in. of H₂O	Numeric Increments, in. of H₂O
0 to 0.25	0.005	0.05
0 to 0.5	0.01	0.1
0 to 1	0.02	0.2
0 to 2	0.05	0.25
0 to 3	0.1	1
0 to 4	0.1	1
0 to 5	0.1	1
0 to 6	0.2	1
0 to 8	0.2	2
0 to 10	0.2	2
0 to 15	0.5	5
0 to 20	0.5	5
0 to 25	0.5	5
0 to 30	1	10
0 to 40	1	5
0 to 50	1	10
0 to 80	2	20
0 to 100	2	20
0 to 150	5	50

NPT Female
Dial Diameter	Pipe Size	Max. Pressure, psi	Environment Temp. Range, °F	Process Temp. Range, °F	Features	Includes		Each
4"	1/8	15	20° to 140°	20° to 140°	Two Inlets and Two Outlets	Plugs for Unused Ports	0000000	000000
NPT Female with NIST Certificate
4"	1/8	15	20° to 140°	20° to 140°	Two Inlets and Two Outlets	Plugs for Unused Ports	0000000	000000

Accessory Kits

Accessory Kit

Includes		Each
9-ft. Lg. × 3/16" ID Tubing Carrying Case Mounting Bracket Two Pipe-to-Tube Adapters	0000000	000000

Optional Air Filter Kits

Air Filter Kit

Includes		Each
Mounting Bracket Mounting Fasteners Two 5-ft. Lg. Aluminum Tubing Two Pressure Tips Two Vent Valves	0000000	000000

Optional Installation Kits

Installation Kit

Includes		Each
7-ft. Lg. PVC Tubing Two Pressure Tips	0000000	00000

Optional Mounting Brackets

Surface Bracket

L Bracket

Wraparound Bracket

				Mounting
Bracket Type	Length	Width	Height	Hole Dia.	Hole Ctr.-to-Ctr. Ht.	Hole Ctr.-to-Ctr. Wd.	No. of Holes	Fasteners Included		Each
Surface	4 13/16"	4 13/16"	__	3/16"	4 3/8"	4.281"	4	No	0000000	000000
L	2 1/4"	4 5/16"	5 3/8"	3/16"	__	__	1	No	0000000	00000
Wraparound	5 1/2"	7 11/16"	4"	3/16"	3.562"	6 5/8"	4	No	0000000	00000

Low-Pressure Differential Gauges with U-Tube

Also known as manometers, these gauges come with indicating liquid that moves up and down two columns—the difference in height between them is your pressure. They are commonly used to indicate clogged filters.

Magnet-mount gauges can be moved for use in multiple locations. Gauges with barbed tube connection have a flexible body that rolls up for storage or transport.

316 Stainless Steel Connection—(in. of H₂O)

For Use With: Acetylene, Air, Argon, Carbon Dioxide, and Steam
Accuracy: Not Rated (Not Graded)

						Environment Temp. Range		Process Temp. Range				Mounting
Pressure Range, in. of H₂O	Scale Range, in. of H₂O	Numeric Increments, in. of H₂O	Graduation Marks, in. of H₂O	Max. Pressure, psi	Ht.	Min., °F	Max., °F	Min., °F	Max., °F	Gender	Mount Type	Fasteners Included	Hole Dia.	Number of Holes		Each
With 1/4 NPT Female Threaded Pipe Connection
0-10	5-0-5	1	0.1	250	14"	35°	150°	35°	250°	Female	Screw On	No	3/16"	4	0000000	0000000
0-15	7-0-7	1	0.1	250	18"	35°	150°	35°	250°	Female	Screw On	No	3/16"	4	0000000	000000

Nylon Plastic Connection—(in. of H₂O)

For Use With: Air, Argon, Carbon Dioxide, and Hydrogen
Accuracy: Not Rated (Not Graded)

With Barbed Tube Connection for 3/16" Tube ID
Pressure Range, in. of H₂O	Scale Range, in. of H₂O	Numeric Increments, in. of H₂O	Graduation Marks, in. of H₂O	Max. Pressure	Ht.	Max. Process Temp., °F	Gender	Mount Type		Each
0-8	4-0-4	1	0.1	Not Rated	17"	130°	Male	Magnet	0000000	0000000
0-12	6-0-6	1	0.1	Not Rated	21"	130°	Male	Magnet	0000000	000000
0-16	8-0-8	1	0.1	Not Rated	25"	130°	Male	Magnet	0000000	000000
0-24	12-0-12	1	0.1	Not Rated	33"	130°	Male	Magnet	0000000	000000
0-30	15-0-15	1	0.1	Not Rated	39"	130°	Male	Magnet	0000000	000000
0-36	18-0-18	1	0.1	Not Rated	45"	130°	Male	Magnet	0000000	000000
0-48	24-0-24	1	0.1	Not Rated	57"	130°	Male	Magnet	0000000	000000
0-60	30-0-30	1	0.1	Not Rated	69"	130°	Male	Magnet	0000000	000000
0-72	36-0-36	1	0.1	Not Rated	81"	130°	Male	Magnet	0000000	000000

Brass Connection—(in. of H₂O)

For Use With: Air, Argon, Carbon Dioxide, and Hydrogen
Accuracy: Not Rated (Not Graded)

With Compression Tube Connection for 1/4" Tube OD
Pressure Range, in. of H₂O	Scale Range, in. of H₂O	Numeric Increments, in. of H₂O	Graduation Marks, in. of H₂O	Max. Pressure, psi	Ht.	Gender	Mount Type		Each
0-8	4-0-4	1	0.1	100	20"	Female	Magnet	0000000	0000000
0-12	6-0-6	1	0.1	100	25"	Female	Magnet	0000000	000000
0-16	8-0-8	1	0.1	100	30"	Female	Magnet	0000000	000000
0-20	10-0-10	1	0.1	100	34"	Female	Magnet	0000000	000000
0-24	12-0-12	1	0.1	100	39"	Female	Magnet	0000000	000000
0-36	18-0-18	1	0.1	100	58"	Female	Magnet	0000000	000000

Low-Pressure Differential Gauges with Digital Display

Measure small changes in air pressure with these hand-held gauges. They have a four-digit LCD display for easy reading of measurements. Gauges are commonly used to indicate clogged filters and to monitor fans and blowers.

Aluminum Case with Nickel-Plated Brass Connection—(kPa, in. of H₂O)

For Use With: Air, Natural Gas
Accuracy: ±0.5% Full Scale (Not Graded)

Pressure Range
kPa	in. of H₂O	Resolution, in. of H₂O	Max. Pressure, psi	For Tube ID	Environment Temp. Range, °F	Process Temp. Range, °F	Digit Ht.	Ht.	Wd.	Batteries Included	Environmental Rating		Each
Barbed Tube Connection
0-4.982	0-20	0.01	10	1/8"-3/16"	35° to 100°	0° to 140°	3/8"	6 1/2"	2 13/16"	Yes	NEC Class I Division 2 Groups A, B, C, D	0000000	0000000
0-49.82	0-200	0.1	30	1/8"-3/16"	35° to 100°	0° to 140°	3/8"	6 1/2"	2 13/16"	Yes	NEC Class I Division 2 Groups A, B, C, D	0000000	000000
Barbed Tube Connection with Calibration Certificate Traceable to NIST
0-4.982	0-20	0.01	10	1/8"-3/16"	35° to 100°	0° to 140°	3/8"	6 1/2"	2 13/16"	Yes	NEC Class I Division 2 Groups A, B, C, D	0000000	000000
0-49.82	0-200	0.1	30	1/8"-3/16"	35° to 100°	0° to 140°	3/8"	6 1/2"	2 13/16"	Yes	NEC Class I Division 2 Groups A, B, C, D	0000000	000000

Optional Nylon Carrying Case

0000000

Each

000000

Low-Pressure Differential Gauges with Inclined Scale

Easier to read than U-tube gauges, these use an inclined scale to measure pressure or velocity in air applications. Gauges are also known as manometers.

Polycarbonate Plastic Connection—(in. of H₂O)

For Use With: Air
Accuracy: ±3% Full Scale (Not Graded)

				Indicating Liquid
Pressure Range, in. of H₂O	Max. Pressure, psi	Max. Process Temp. Range, °F	Ht.	Color	Specific Gravity	Mount Type	Mounting Fasteners Included	Includes		Each
With Barbed Tube Connection for 3/16" Tube ID
0-3	10	140°	6"	Red	0.826	Screw On	Yes	8-ft. Lg. Tubing; Indicating Liquid	000000	000000
0-7	10	140°	6"	Blue	1.91	Screw On	Yes	8-ft. Lg. Tubing; Indicating Liquid	000000	000000

Differential Pressure and Vacuum Gauges

Commonly used to indicate clogged filters, these gauges display the difference between two pressure or vacuum measurements. They are also known as compound gauges.

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

Aluminum Case with Aluminum Connection—Single Scale (in. of H₂O)

For Use With: Air
Accuracy: ±2% Mid Scale (Not Graded); except
0 to 0.2" in. of H₂O: ±4% Mid Scale (Not Graded)
0 to 0.25" in. of H₂O: ±3% Mid Scale (Not Graded)

Available Pressure and Vacuum Ranges
Pressure Range, in. of H₂O	Vacuum Range, in. of H₂O	Graduation Marks, in. of H₂O	Numeric Increments, in. of H₂O
0 to 0.2"	-0.05" to 0	0.01	0.05
0 to 0.25"	-0.25" to 0	0.01	0.05
0 to 0.5"	-0.5" to 0	0.02	0.1
0 to 1"	-1" to 0	0.05	0.25
0 to 5"	-5" to 0	0.2	1
0 to 10"	-10" to 0	0.5	5
0 to 15"	-15" to 0	1	5

NPT Female
Dial Diameter	Pipe Size	Max. Pressure, psi	Environment Temp. Range, °F	Process Temp. Range, °F	Features	Includes		Each
4"	1/8	15	20° to 140°	20° to 140°	Two Inlets and Two Outlets	Plugs for Unused Ports	00000000	000000
NPT Female with NIST Certificate
4"	1/8	15	20° to 140°	20° to 140°	Two Inlets and Two Outlets	Plugs for Unused Ports	0000000	000000

Differential Pressure and Vacuum Gauges with Digital Display

Gauges have a four-digit LCD display for easy reading of measurements. Commonly used to indicate clogged filters, these gauges display the difference between two pressure or vacuum measurements. They are also known as compound gauges.

Aluminum Case with Brass Connection—(psi, kPa, in. of H₂O, in. of Hg, mbar)

For Use With: Air
Accuracy: ±0.5% Full Scale (Not Graded)

Pressure Range
psi	kPa	in. of H₂O	mbar	Vacuum Range, in. of Hg	Resolution, in. of H₂O	Max. Pressure, psi	For Tube ID	Environment Temp. Range, °F	Process Temp. Range, °F	Digit Ht.	Batteries Included	Features		Each
Barbed Tube Connection
0-0.723	0-4.982	0-20"	0-49.82	1.471"-0	0.01	10	1/8"-3/16"	35° to 100°	0° to 140°	3/8"	Yes	40-Reading Memory, Overpressure Alarm	0000000	0000000
0-7.225	0-49.82	0-200"	0-498.2	14.71"-0	0.1	30	1/8"-3/16"	35° to 100°	0° to 140°	3/8"	Yes	40-Reading Memory, Overpressure Alarm	0000000	000000
0-20	0-137.9	0-553"	0-1,379	40.72"-0	0.01	60	1/8"-3/16"	35° to 100°	0° to 140°	3/8"	Yes	40-Reading Memory, Overpressure Alarm	0000000	000000
Barbed Tube Connection with Calibration Certificate Traceable to NIST
0-0.723	0-4.982	0-20"	0-49.82	1.471"-0	0.01	10	1/8"-3/16"	35° to 100°	0° to 140°	3/8"	Yes	40-Reading Memory, Overpressure Alarm	0000000	000000
0-7.225	0-49.82	0-200"	0-498.2	14.71"-0	0.1	30	1/8"-3/16"	35° to 100°	0° to 140°	3/8"	Yes	40-Reading Memory, Overpressure Alarm	0000000	000000
0-20	0-137.9	0-553"	0-1,379	40.72"-0	0.01	60	1/8"-3/16"	35° to 100°	0° to 140°	3/8"	Yes	40-Reading Memory, Overpressure Alarm	0000000	000000

Pressure and Vacuum Transmitters with Digital Display

Transmitter

Programmable Red/Green Display

For Use With: Air, Argon, Diesel Fuel, Hydraulic Fluid, Nitrogen, Water
Accuracy: ±1%
Pipe Connection Type: Threaded
Housing Material: Glass-Reinforced Polyester Housing
Connection Material: 316L Stainless Steel
Temperature Range: -10° to 175°F

Monitor and control vacuum pumps, air compressors, and hydraulics while viewing readings and warnings on the display. These transmitters, also called transducers, have two outputs, so you can program them to work as a transmitter, a switch, or both. When they reach their setpoint, they send electrical signals to your programmable logic controller (PLC) to trigger actions in your system. Adjust their reset point anywhere within the setpoint range. To change settings and receive error messages remotely from your PLC or computer, program one of the outputs to use IO Link. You need an IO-Link controller (not included) to connect to your interface.

Buttons on the display let you change your setpoint, measuring range, and other settings. To quickly tell the status of your process, you can program the color of the display to red and green. LEDs on the corners also notify you of your output’s switching status. Rotate the head to view the display from the best angle.

You must calibrate your PLC in order for it to interpret signals from these transmitters. As pressure increases, so does the output signal. These transmitters only give accurate readings within the rated pressure range.

All have an M12 plug to connect to M12 sockets. When using both switching outputs and an IO-Link controller, they require four wires to connect. For their 4-20mA analog output, they need two wires to connect. View switch wiring diagrams by selecting a part number and clicking Product Detail.

To withstand wet environments, these transmitters have a 316L stainless steel connection and are IP rated. Their IP ratings also mean they’re dust tight and stand up to spraying water and brief submersion. UL and C-UL listed as well as CE marked, they meet strict American, Canadian, and European safety standards.

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

								Configurable Digital Output		Configurable Analog/Digital Output
Setpoint, psi	Pressure Range, psi	Max. Pressure, psi	Vacuum Range, in. of Hg	Input Voltage	Pipe Size	Ht.	Wd.	No. of	Signal Type	No of.	Current	Signal Type	Scale		Each
NPT Female
-14.3 to 14.5	-14.5 to 14.5	145	0 to 29.5	18-30V DC	1/4	3 9/16"	1 3/8"	1	NPN, PNP	1	4-20mA	NPN, PNP	in. of H2O, in. of Hg, kPa, mbar, psi	0000000	0000000
NPT Male
-14.3 to 14.5	-14.5 to 14.5	145	0 to 29.5	18-30V DC	1/4	3 9/16"	1 3/8"	1	NPN, PNP	1	4-20mA	NPN, PNP	in. of H2O, in. of Hg, kPa, mbar, psi	0000000	000000
BSPP Female
-14.3 to 14.5	-14.5 to 14.5	145	0 to 29.5	18-30V DC	1/4	3 9/16"	1 3/8"	1	NPN, PNP	1	4-20mA	NPN, PNP	in. of H2O, in. of Hg, kPa, mbar, psi	0000000	000000
-7.16 to 7.26	-7.3 to 7.3	145	0 to 14.8	18-30V DC	1/4	3 9/16"	1 3/8"	1	NPN, PNP	1	4-20mA	NPN, PNP	in. of H2O, kPa, mbar, psi	0000000	000000
-0.64 to 14.5	-0.7 to 14.5	145	0 to 1.4	18-30V DC	1/4	3 9/16"	1 3/8"	1	NPN, PNP	1	4-20mA	NPN, PNP	in. of H2O, kPa, mbar, psi	0000000	000000
BSPP Male
-14.3 to 14.5	-14.5 to 14.5	145	0 to 29.5	18-30V DC	1/4	3 11/16"	1 3/8"	1	NPN, PNP	1	4-20mA	NPN, PNP	in. of H2O, in. of Hg, kPa, mbar, psi	0000000	000000

Low-Pressure Differential Pressure Transmitters

For Use With: Air, Argon, Nitrogen
Accuracy: ±1%
Tube Connection Type: Barbed
Housing Material: Polycarbonate
Temperature Range: 32° to 122° F

These transmitters are commonly used to monitor airflow and to indicate when filters in HVAC systems become clogged. They convert the difference in pressure between two points in a low-pressure system into an electrical signal that can be interpreted by receiving devices, such as remote displays, programmable logic controllers, and motor speed controls to monitor pressure or control equipment. Transmitters will only provide accurate readings within the rated pressure range. They come with a calibration certificate traceable to NIST. Maximum pressure is the maximum spike in pressure a transmitter can withstand without damage. Transmitters are accurate only within the pressure range, not up to the maximum pressure. All transmitters are rated IP67 for protection in washdown environments.

These transmitters connect using three wires—two wires into the power supply and a separate wire that sends a voltage signal to the receiver. The receiver and the transmitter share a common ground wire back to the power supply.

							Mounting Holes				Transmitters with Calibration Certificate Traceable to NIST
Pressure Range, in. of H2O	Max. Pressure, psi	Input Voltage	For Tube ID	For No. of Wires	For DIN Rail Ht., mm	Mounting Hardware Included	Dia.	No. of	Ht.	Wd.		Each
0-10V DC Voltage Output—Screw Terminals
Surface Mount
-0.5 to 0.5, -1 to 1, -2.5 to 2.5, -5 to 5	10	13-30V DC	3/16"	3	__	No	3/16"	2	5 7/16"	3 3/16"	0000000	0000000
DIN Rail or Surface Mount
-0.5 to 0.5, -1 to 1, -2.5 to 2.5, -5 to 5	10	13-30V DC	3/16"	3	35	No	3/16"	2	5 7/16"	3 3/16"	0000000	000000

Hazardous Location Easy-Setup Differential Pressure Transmitters

For Use With: Air, Argon, Hydraulic Fluid, Nitrogen, Water
Accuracy: ±0.075%
Pipe Connection: NPT Female
Housing Material: Aluminum
Connection Material: Hastelloy
Temperature Range: -40° to 185° F

For use in hazardous locations, these transmitters safely measure the difference in pressure between two process lines in flow applications—such as heat exchangers, chillers, and pumps. They meet NEC safety standards, so they protect against an explosion where flammable gases and vapors are present.

Automatically compensating for error from temperature fluctuations or vibration, these transmitters don’t require additional programming into your receiving device to correct these factors. Set the pressure range with the keypad, select the unit of measure, and zero the transmitter. They convert differential pressure into an electrical signal that can be interpreted by receiving devices, such as remote displays, programmable logic controllers (PLCs), and motor speed controls, to monitor pressure or control equipment. Transmitters will only provide accurate readings within the rated pressure range. Maximum pressure is the greatest spike in pressure a transmitter can tolerate without damage. Transmitters are accurate only within the pressure range, not up to the maximum pressure. Rated IP66 and NEMA 4X, they protect against dirt, dust, corrosion, weather, and washdowns, and the hastelloy connection protects against harsh chemicals.

Most often, these transmitters connect using two wires to send a 4-20mA current output. The same wire that sends a signal to the receiver also powers the transmitter. Current doesn’t lose signal over long distances and isn’t affected by electrical interference from other devices. Three- and four-wire configurations are also possible.

						Mounting Holes
Pressure Range	Max. Pressure, psi	Input Voltage	Pipe Size	For No. of Wires	Mounting Hardware Included	Dia.	No. of	Ht.	Wd.	Communication Protocol	Environmental Rating		Each
4-20mA Current Output—Screw Terminals
0-24 in. of H2O	3,625	11-55V DC	1/4	2, 3, 4	No	7/16"	8	7 7/8"	5 1/4"	HART	NEC Class I Divisions 1, 2 Groups A, B, C, D; IP66; NEMA 4X	0000000	0000000
0-160 in. of H2O	5,800	11-55V DC	1/4	2, 3, 4	No	7/16"	8	7 7/8"	5 1/4"	HART	NEC Class I Divisions 1, 2 Groups A, B, C, D; IP66; NEMA 4X	0000000	000000
0-1,000 in. of H2O	5,800	11-55V DC	1/4	2, 3, 4	No	7/16"	8	7 7/8"	5 1/4"	HART	NEC Class I Divisions 1, 2 Groups A, B, C, D; IP66; NEMA 4X	0000000	000000

Easy-Setup Differential Pressure Transmitters

For Use With: Air, Argon, Hydraulic Fluid, Nitrogen, Water
Accuracy: ±0.075%
Pipe Connection: NPT Female
Housing Material: Aluminum
Connection Material: Hastelloy
Temperature Range: -40° to 185° F

Measure the difference in pressure between two process lines in flow applications such as heat exchangers, chillers, and pumps. These transmitters automatically compensate for error introduced by vibration as well as temperature fluctuations, so you do not need to program your receiving device to correct for these factors. Use the keypad to set the pressure range, choose the unit of measure, and zero the transmitter. These transmitters convert differential pressure to an electrical signal that can be interpreted by receiving devices, such as remote displays, programmable logic controllers, and motor speed controls to monitor pressure or control equipment. Transmitters will only provide accurate readings within the rated pressure range. Maximum pressure is the maximum spike in pressure a transmitter can withstand without damage. Transmitters are accurate only within the pressure range, not up to the maximum pressure. All transmitters meet IP66 and NEMA 4X for use in washdown and corrosive environments and have a hastelloy diaphragm to resist harsh chemicals.

These transmitters typically connect using two wires to send a 4-20mA current output. 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. They can also be configured using three or four wires.

						Mounting Holes
Pressure Range	Max. Pressure, psi	Input Voltage	Pipe Size	For No. of Wires	Mounting Hardware Included	Dia.	No. of	Ht.	Wd.	Communication Protocol	Environmental Rating		Each
4-20mA Current Output—Screw Terminals
0-24 in. of H2O	3,625	11-55V DC	1/4	2, 3, 4	No	7/16"	8	7 7/8"	5 1/4"	HART	IP66, NEMA 4X	0000000	0000000
0-160 in. of H2O	5,800	11-55V DC	1/4	2, 3, 4	No	7/16"	8	7 7/8"	5 1/4"	HART	IP66, NEMA 4X	0000000	000000
0-1,000 in. of H2O	5,800	11-55V DC	1/4	2, 3, 4	No	7/16"	8	7 7/8"	5 1/4"	HART	IP66, NEMA 4X	0000000	000000

Ultra-High-Accuracy Digital Test Gauges for Pressure

Bottom Connection

With an accuracy of ±0.05%, these have the highest accuracy of all our test gauges. Use them for testing, calibrating, laboratory applications, and other critical processes that require precision. They have a five-digit LCD display that allows for easy reading of measurements.

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

304 Stainless Steel Case with 316 Stainless Steel Connection—Battery Powered

For Use With: Air, Diesel Fuel, Gasoline, Hydraulic Fluid, Natural Gas, Water
Accuracy: ±0.05% Full Scale (Grade 5A)

Available Pressure Ranges
Pressure Range
psi	kPa	bar	kg/cm²	MPa	in. of H₂O	Resolution, psi
0 to 10	0 to 65	0 to 0.6	0 to 0.7	0 to 0.06	0 to 270	0.001
0 to 15	0 to 100	0 to 1	0 to 1	0 to 0.1	0 to 410	0.001
0 to 30	0 to 200	0 to 2	0 to 2	0 to 0.2	0 to 830	0.001
0 to 60	0 to 410	0 to 4	0 to 4	0 to 0.4	0 to 1,600	0.001
0 to 100	0 to 680	0 to 6	0 to 7	0 to 0.6	0 to 2,700	0.01
0 to 160	0 to 1,100	0 to 11	0 to 11	0 to 1.1	0 to 4,400	0.01
0 to 200	0 to 1,300	0 to 13	0 to 14	0 to 1.3	0 to 5,500	0.01
0 to 300	0 to 2,000	0 to 20	0 to 20	0 to 2	0 to 8,300	0.01
0 to 600	0 to 4,100	0 to 40	0 to 40	0 to 4	0 to 16,600	0.01
0 to 800	0 to 5,500	0 to 55	0 to 55	0 to 5	0 to 22,100	0.01
0 to 1,000	0 to 6,800	0 to 65	0 to 70	0 to 6	0 to 27,700	0.1
0 to 2,000	0 to 13,700	0 to 135	0 to 140	0 to 13	0 to 55,400	0.1
0 to 3,000	0 to 20,600	0 to 205	0 to 210	0 to 20	0 to 83,100	0.1

								Bottom Connection
Dial Dia.	Pipe Size	Environment Temperature Range, °F	Process Temperature Range, °F	Environmental Rating	Features	Digit Ht.	Batteries Included		Each
NPT Male—Calibration Certificate Traceable to NIST
3"	1/4	-40° to 180°	0° to 150°	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 IP65	Configurable Automatic Shut-Off (2 min., 5 min., 15 min., 30 min., or Never)	1 1/8"	Yes	0000000	000000000

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