Vacuum Instruments | McMaster-Carr

	Pipe Size Pipe Size

1/8

1/4

1/2

	Thread Type Thread Type

NPT

BSPP

NPTF

	Scale Scale

	Measures Measures

Pressure

Vacuum

Differential Pressure

Differential Vacuum

Temperature

	Connection Location Connection Location


Bottom	Center Back	Lower Back

	For Use With For Use With

	Dial Diameter Dial Diameter

	Scale Type Scale Type


Dual	Single

	Dial Type Dial Type


Dry	Liquid Filled

	Case Material Case Material

	Connection Material Connection Material

	Display Type Display Type


Dial	Digital

	Connection Style Connection Style

	Gender Gender

Male

Female

	Connection Type Connection Type


Pipe	Tube

Circuit Board	Qwiic

	Maximum Vacuum , in. of Hg Maximum Vacuum , in. of Hg

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Maximum Process Temperature Maximum Process Temperature

	Lens Material Lens Material

Plastic

Glass

Rubber

	Accuracy Scale Accuracy Scale

Full Scale

Mid Scale

	Maximum Environment Temperature Maximum Environment Temperature

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

RoHS Compliant with
Exemptions

RoHS Compliant

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

REACH Compliant

Forward

How can we improve?

329 Products

About Pressure Gauges

Differential Pressure and Vacuum
Gauges with Digital Display

Gauges have a digital display for easy reading of measurements.

Differential Pressure and Vacuum Gauges

Commonly used to indicate clogged filters, these gauges display the difference between two pressure or vacuum measurements.

3-in-1 Pressure and Vacuum Gauges

These portable gauges have three different dials to display pressure and vacuum measurements on a low, medium, and high scale.

Digital Pressure and Vacuum Gauges

A digital display allows for easy reading of measurements.

Pressure and Vacuum Gauges

Also known as compound gauges, these measure both pressure and vacuum.

Vibration-Resistant Pressure and Vacuum Gauges

A glycerin-filled dial reduces needle flutter for precise readings in high-vibration applications.

Refrigeration Pressure and Vacuum Gauges

Often used with chillers and in refrigeration systems, these gauges display the temperature of ammonia relative to the pressure measurement.

Vibration- and Corrosion-Resistant
Pressure and Vacuum Gauges

Designed for harsh environments prone to vibration, these gauges pair a corrosion-resistant 304 stainless steel case with a glycerin-filled dial that reduces needle flutter.

Corrosion-Resistant Pressure and Vacuum Gauges

A 304 stainless steel case coupled with 316 stainless steel connection threads provide protection from corrosive environments.

Digital High-Accuracy Pressure Gauges

A digital display allows for easy reading of measurements.

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.

Vacuum Gauges

Use these gauges with vacuum pumps, packaging equipment, and in suction lines to measure and display vacuum.

Ultra-Low Vacuum Gauges

Accommodate applications with a vacuum range of -100 in. of H₂O to 0 in. of H₂O.

Vibration- and Corrosion-Resistant Vacuum Gauges

Designed for harsh environments prone to vibration, these gauges pair a corrosion-resistant 304 stainless steel case with a glycerin-filled dial to reduce needle flutter.

Vibration-Resistant Vacuum Gauges

A glycerin-filled dial reduces needle flutter for precise readings in high-vibration applications.

Corrosion-Resistant Vacuum Gauges

The case and connection threads are stainless steel for protection in corrosive environments.

Absolute Pressure Gauges

Unlike other gauges that measure the difference between your system and the atmosphere, these give measurements relative to zero pressure.

Hand-Held High-Vacuum Gauges

Check the vacuum levels in high-vacuum pumps, valves, and chambers with this compact gauge.

Pressure and Vacuum Transmitters

Remote Displays for Pressure Transmitters

Monitor pressure in your system from a distance by using this display in conjunction with pressure transmitters.

Absolute Pressure Transmitters
for Development Boards

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.

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.

Pressure and Vacuum Transmitters with Digital Display

Monitor and control vacuum pumps, air compressors, and hydraulics while viewing readings and warnings on the display.

Pressure and Vacuum Transmitters

Convert both pressure and vacuum 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.

Pressure and Vacuum Transmitters for Compressed Air

Specifically made for compressed air and gas systems, these transmitters remotely monitor pressure and vacuum.

Hazardous Location Easy-Setup
Pressure and Vacuum Transmitters

Used in hazardous locations, these transmitters safely convert pressure and vacuum into an electrical signal to measure liquids, gases, and steam. NEC rated for safety, these transmitters are explosion proof, so they can be used in environments containing flammable gases and vapors.

Easy-Setup Pressure and Vacuum Transmitters

These transmitters automatically compensate for error introduced into both pressure and vacuum measurements by vibrations as well as temperature fluctuations, so you do not need to program corrections for these factors into your receiving device. They convert pressure and vacuum 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.

High-Accuracy Pressure and Vacuum Transmitters

With an accuracy of ±0.25%, use these transmitters in applications that require highly accurate measurement of both pressure and vacuum, such as activating vacuum pumps.

Differential Pressure Transmitters
with Dial Indicator for Air

Check the difference in air pressure between two inputs at the source using the dial indicator or remotely using a receiver.

Vacuum Transmitters for Compressed Air

Designed for compressed air and gas systems, these transmitters remotely monitor vacuum.

High-Accuracy Vacuum Transmitters

At least four times as accurate as standard vacuum transmitters, these transmitters sense vacuum at an accuracy of ±0.25%, making them ideal for use in laboratories and in analytical testing applications.

Adjustable-Range Vacuum Transmitters

Account for changes in vacuum readings over time by fine-tuning the vacuum range on these transmitters.

Vacuum Transmitters

Convert vacuum into an electrical signal that can be interpreted by receiving devices, such as remote displays, programmable logic controllers, and motor speed controls to monitor vacuum or control equipment.

Test Gauges for Vacuum

Use these gauges to test and calibrate transmitters, gauges, and other equipment that measures vacuum.

Differential Pressure Switches with Dial Indicator for Air

Troubleshoot and monitor the difference in air pressure between two points—these switches have a dial indicator to show differential pressure in real time.

Electric Ultra-High-Vacuum Pumps

Achieve vacuum levels up to 1 x 10 ^-12 torr with these ultra-high-vacuum pumps.