Absolute Pressure Gauges

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28 Products

About Pipe Size

About Pressure Gauges

About Pressure Transmitters

Bottom Connection

Unlike other gauges that measure the difference between your system and the atmosphere, these give measurements relative to zero pressure. They’re often used in laboratory applications, and they are barometrically independent.

Gauges with a Torr scale are also known as Torr gauges.

Stainless steel gauges have excellent corrosion resistance, so they can be used with more corrosive liquids and gasses than gauges with a brass connection and aluminum case.

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

Anodized Aluminum Case with Brass Connection—Dual Scale (mbar, Torr)

For Use With: Air
Accuracy: ±2% Full Scale (Not Graded)

Available Pressure Ranges
		Numeric Increments		Graduation Marks
Pressure Range, mbar	Pressure Range, Torr	mbar	Torr	mbar	Torr
0 to 25	0 to 20	5	2	0.5	0.2
0 to 50	0 to 40	10	10	1	1
0 to 130	0 to 100	20	20	2	2
0 to 1,000	0 to 760	200	100	20	10

					Bottom Connection
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Lens Material		Each
NPT Male
4"	1/4	5° to 120°	0° to 145°	Glass	000000	0000000

Stainless Steel Case with Stainless Steel Connection—Single Scale (mbar)

For Use With: Air, Carbon Dioxide, Diesel Fuel, Ethyl Alcohol, Gasoline, Hydraulic Fluid, Natural Gas, Water
Accuracy: ±1% Full Scale (Not Graded)

Available Pressure Ranges
Pressure Range, mbar	Numeric Increments, mbar	Graduation Marks, mbar
0 to 25	5	0.5
0 to 60	10	1
0 to 160	50	5
0 to 600	100	10
0 to 1,000	200	20

					Bottom Connection
Dial Diameter	Pipe Size	Environment Temp. Range, °F	Process Temp. Range, °F	Lens Material		Each
BSPP Male
4"	1/2	5° to 120°	0° to 200°	Glass	000000	000000000

Hand-Held High-Vacuum Gauges

Front

Back

Check the vacuum levels in high-vacuum pumps, valves, and chambers with this compact gauge. Use a ring and clamp (both sold separately) to connect them to another quick-clamp high-vacuum fitting, also known as KF, QF, and NW fittings. The digital display shows measurements in torr, mbar (millibar) and hPa (hectopascal).

ABS Plastic Case with 304 Stainless Steel Connection—(Torr, mbar, hPa)

For Use With: Air
Accuracy: ±10% @ 7.5 to 7.5 × 10 ^-3 torr, ±30% @ 75 to 7.5 torr

Vacuum Range
Torr	mbar	hPa
750 to 7.5 × 10 ^-5	1000 to 5 × 10 ^-4	1000 to 5 × 10 ^-4

Gauges with Center Back Connection											Clamps		Rings
High-Vacuum Flange Size	Wd.	Ht.	Dp.	Environment Temp. Range, °F	Process Temp. Range, °F	For Tube OD	Flange OD	Number of Batteries Included		Each		Each		Each
Quick Clamp Tube Connection
16	2 3/8"	4 3/4"	1"	40° to 100°	0° to 140° F	3/4"	1.18"	1	000000	000000000	00000000	00000	00000000	00000

Absolute Pressure Transmitters

Monitor and control pressure in portable HVAC systems, hydraulics, and oil and gas equipment. Unlike other pressure transmitters that measure the difference between your system and the atmosphere, these transmitters give measurements relative to zero pressure—regardless of altitude or temperature. Also known as transducers, they convert pressure into an electrical signal that can be interpreted by receiving devices, such as remote displays, programmable logic controllers (PLCs), and motor speed controls. For your receiving device to interpret the signal from the transmitter, you will need to calibrate it for the transmitter's pressure range and output signal. Transmitters will only provide accurate readings within the rated pressure range.

All transmitters are rated IP67 for protection from dust and temporary submersion during washdowns. Those that are rated NEMA 4X also protect against weather and corrosion.

Transmitters with current output connect using two wires. 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.

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

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

4-20mA Current Output—Wire Leads

For Use With: Air, Argon, Diesel Fuel, Gasoline, Hydraulic Fluid, Nitrogen, Water
Accuracy: ±1.5%
Pipe Connection: NPT Male
Housing Material: Glass-Reinforced Nylon
Connection Material: 316L Stainless Steel
Temperature Range: -40° to 255° F

Pressure Range, psi	Maximum Continuous Pressure, psi	Maximum Short-Term Pressure, psi	Input Voltage	Pipe Size	Ht.	Wd.	Environmental Rating		Each
0-15	30	30	9-36V DC	1/4	1 15/16"	15/16"	IP67, NEMA 4X	0000000	0000000
0-30	60	60	9-36V DC	1/4	1 15/16"	15/16"	IP67, NEMA 4X	0000000	000000
0-50	100	100	9-36V DC	1/4	1 15/16"	15/16"	IP67, NEMA 4X	0000000	000000
0-100	200	200	9-36V DC	1/4	1 15/16"	15/16"	IP67, NEMA 4X	0000000	000000
0-200	400	400	9-36V DC	1/4	1 15/16"	15/16"	IP67, NEMA 4X	0000000	000000
0-300	600	600	9-36V DC	1/4	1 15/16"	15/16"	IP67, NEMA 4X	0000000	000000
0-500	1,000	1,000	9-36V DC	1/4	1 15/16"	15/16"	IP67, NEMA 4X	0000000	000000

0-5V DC Voltage Output—Aptiv MP-150 Plug Connection

For Use With: Air, Argon, Diesel Fuel, Gasoline, Hydraulic Fluid, Nitrogen, Water
Accuracy: ±1.2%
Pipe Connection: NPT Female
Housing Material: Glass-Reinforced Polyester
Connection Material: Brass
Temperature Range: -40° to 275° F

Pressure Range, psi	Maximum Continuous Pressure, psi	Maximum Short-Term Pressure, psi	Input Voltage	Pipe Size	Ht.	Wd.	Environmental Rating		Each
0-75	360	1,595	4.5-5.5V DC	1/4	1 15/16"	13/16"	IP67	0000000	000000
0-150	435	1,595	4.5-5.5V DC	1/4	1 15/16"	13/16"	IP67	0000000	00000
0-200	550	1,595	4.5-5.5V DC	1/4	1 15/16"	13/16"	IP67	0000000	00000
0-265	780	1,595	4.5-5.5V DC	1/4	1 15/16"	13/16"	IP67	0000000	00000
0-315	900	1,595	4.5-5.5V DC	1/4	1 15/16"	13/16"	IP67	0000000	00000
0-665	1,320	2,490	4.5-5.5V DC	1/4	1 15/16"	13/16"	IP67	0000000	00000

Absolute Pressure Transmitters for Development Boards

For Use With: Air, Argon, Nitrogen, Water
Accuracy: ±0.25%
Tube Connection: Unthreaded Male
Housing Material: Stainless Steel
Connection Material: Stainless Steel
Temperature Range: 30° to 120° F

Measure your equipment’s pressure and send the data directly to a development board or single-board computer. Also known as transducers, these transmitters convert pressure into an electrical I2C signal and transmit it to your board by connecting a cord (not included) with a Qwiic connection. Transmitters connect directly to your machinery via tubing (not included), letting you monitor activity such as gas tank pressurization and liquid fill level.

Unlike other pressure transmitters that measure the difference between your system and the atmosphere, these transmitters give measurements relative to zero pressure—regardless of altitude or temperature. They will only provide accurate readings within the rated pressure range.

I2C Communication Protocol—Qwiic Connection
Pressure Range, psi	Maximum Continuous Pressure, psi	Maximum Short-Term Pressure, psi	Input Voltage	For Tube ID	I2C Address	No. of Qwiic Connections	Ht.	Wd.		Each
1-25	60	60	1.8-3.6V DC	0.1"	0x18	2	1"	1"	0000000	000000