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High pressure gauges can be used to effectively read pressures up to 10,000 PSI; low pressure gauges generally measure pressures between 10 and 15 PSI. When gases and liquids are contained in sealed systems or closed vessels, internal pressure occurs. Read More…

Vacuum Gauges Vacuum gauges are instruments used to measure and display sub-atmospheric or vacuum pressures within a system or vessel.
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Leading Manufacturers

West Valley City, UT  |  800-316-5342

The pressure gauges that we are able to manufacture will withstand the tests of time in order to provide a lasting value! We are dedicated to serving customers around the world with our products! It is our goal that we are able to offer products to our customers that fit their exact needs. To learn more about what we may be able to do for you; visit us online today!

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HydraCheck $$$

Cleveland, OH  |  216-281-1100

Meriam offers a wide variety of mechanical and digital pressure gauges for process measurement and indication. Terrific accuracy specifications and little-to-no temperature effect set these instruments apart from the competition. Many of our digital gauge products have multiple output options to increase their versatility in today’s changing control schemes.

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Meriam Process Technologies $$$

Branford, CT  |  203-481-2545

Differential Pressure Plus manufactures quality pressure gauges for air, gases, liquids and chemicals used in the filtration industry. Our digital or standard gauges are made of stainless steel, aluminum, ceramic, Teflon® and Buna. Check out our new Backflow Preventer Test Kit.

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Differential Pressure Plus, Inc. $$$

Fultonville, NY  |  800-833-0081

Anderson is a leading designer and manufacturer of high-quality pressure gauges, pressure switches and other transmitter instruments for the sanitary process of a variety of industries such as beverage, dairy, fluid food, biopharmaceutical. Call us today for more information about our products!

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Anderson-Negele $$$

Orlando, FL  |  800-394-8134

Bailey Motor Equipment Co. has been in the engine business since 1933. We are a distributor of quality products and specialize in carburetion of all types, engine protection, and instrumentation. We serve a lot of industries including the agriculture, industrial, oil and gas, and marine industries all over the world. Call us today for more information.

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Bailey Motor Equipment Co. $$$
placeholder image HydraCheck Meriam Process Technologies Differential Pressure Plus, Inc. Anderson-Negele Bailey Motor Equipment Co.

When the atmospheric pressure within an enclosure is below ~14.7 PSI, that enclosure is said to be a vacuum. It is impossible to artificially achieve a pressure of zero, and there are no examples of absolute vacuums in nature or in space. An enclosure can, however, be partially evacuated of its contents. Vacuum gauges are used to measure the extent to which enclosures have been evacuated; they measure low pressure, not negative pressure. Vacuum gauges are made from metal such as stainless steel or aluminum.

Some provide analog feedback in the form of a dial while others are digital meters. Gauge specifications include display types, scale types, vacuum range, operating temperature, accuracy and scale units. Dual scale devices provide the pressure reading in two sets of units while differential pressure gauges take and compare two pressure readings.

Vacuum Gauge Vacuum Gauges - HydraCheck

Some vacuum gauges include temperature compensation features to adjust possible errors due to changes in temperature. These instruments play an important role in industrial, manufacturing and scientific applications. Vacuums are frequently used to create cold temperatures for certain processes; without gauges the operator would not know the internal pressure, which can be dangerous and inefficient.

Vacuum gauges use several methods to take readings. One way is through a manometer, a U-shaped tube partially filled with a liquid like water, mercury or oil. A change in pressure causes the water column in each side of the U to rise or fall, which is detected by a sensor and then indicated on the dial or screen. Thermocouple gauges use a different technique. They measure the changes in the thermal conductivity of a gas inside a tube. A filament is heated to promote movement.

As electrons move from the source (cathode) to the drain (anode) they interact with the gas molecules, making them positive ions. This causes a current that is identified and measured. Similar gauges are also available with components that stay cool; this allows them to withstand sudden or prolonged exposure to high pressure gases. Vacuum gauges are also used in automobiles because of the presence of manifold vacuums that draw in air to power the engine of the vehicle.

This vacuum regulates the ratio of fuel and air so the engine can run at peak performance. Automotive vacuum gauges help identify the presence of air leaks in the system, which results in a rough idle, poor fuel economy and increased emissions. These gauges are attached to a plug on the intake manifold of the engine.

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