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Air Pressure Gauges

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The word “fluid” technically can be used to describe a liquid or gas, and pressure gages used to measure the concentration of liquid in an enclosure closely resemble gas pressure gauges in terms of their construction and operating principles. Read More…

Air Pressure Gauges Air pressure gauges are tools used to indicate the pressure of a gas within an enclosure. Fluid pressure is the measurement of the concentration of molecules in an enclosure; that presence manifests itself in terms of the force that the molecules exert against the boundaries of their enclosure.
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Leading Manufacturers

Georgetown, TX  |  888-328-4667

Fathoms Technology manufactures and distributes a wide range of instrumentation for the measurement and control of gas and liquid applications. Our Texas facility produces an economical line of "Gas Mass" flow meters and controllers as well as offering NIST traceable calibrations for meters of all types. Level Switches, Pressure Transducers, Pressure Switches, Digital Pressure Gauges.

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Fathoms Technology, Inc. $$$

Sycamore, IL  |  866-248-6356

For more than 50 years, Auto Meter Products, Inc. has given racers and vehicle builders revolutionary vehicle electronics and instrumentation. We provide state-of-the-art cellular manufacturing operations, a world class ISO 9000:TS 16949 Certified Quality System, an advanced engineering team, and product technology that is unmatched in the instrumentation industry.

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Auto Meter Products, Inc. $$$

Tulsa, OK  |  918-317-4100

Known worldwide for our Swichgage® and Murphygage® instruments, FW Murphy manufactures pressure gauges for engine protection. Our vacuum gauges are rugged steel with tube sensing elements that keep out damaging condensation. Since 1939, we have developed control solutions that are limitless.

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Enovation Controls $$$

Rochester, NY  |  800-232-5335

Tel-Tru Manufacturing Company is a world-class manufacturer of pressure gauges and accessories, plus bimetal thermometers. Our pressure gauges include stainless steel, low pressure, liquid filled and mechanical contractor gauges. Our products will suit all your measurement needs. Our focus has always been to provide quality products, leading technology and responsive service.

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Tel-Tru Manufacturing Company $$$
placeholder image Fathoms Technology, Inc. Auto Meter Products, Inc. Enovation Controls Tel-Tru Manufacturing Company

While the term "air pressure gauge" is not descriptive only of pressure gauges that measure air concentrations, it is limited to the measurement of gas concentration and excludes the measurement of liquid pressure. Air pressure gauges are important to industry, commerce and even in consumer products markets. They are used to determine gas concentration levels in gas storage tanks used for industrial processes, they are used to prevent explosions in boilers and they can be used to measure tire air pressure. Gas pressure is an expression of quantity, and measuring that pressure is the means by which the fullness or emptiness of a gas container can be determined.

There are many contexts in which air pressure gauges are employed, and the number of different gauge configurations is equally large. Barometers are examples of simple air pressure gauges; they are used to measure atmospheric pressure. A firm understanding of how a barometer works lends itself to a richer understanding of how more complicated pressure gauges operate. A barometer features a fluid in a container that is partially open to air exposure.

The level of the fluid in the barometer indicates the level of atmospheric pressure in the barometer's immediate area. When the pressure increases, the level of the fluid in the barometer rises; when pressure falls, the fluid level also falls. All air pressure gauges accomplish this same task, though each configuration varies in the way in which it is accomplished. Bourdon gauges, for example, involve a strip of metal that changes shape based on differences in fluid pressure.

Bourdon gauges are used to measure pressures relative to ambient atmospheric pressure. This means that the idle needle position on a Bourdon gauge indicates current atmospheric pressure; any needle position relative to the idle position indicates a pressure relative to current atmospheric pressure. Other gauge configurations are capable of measuring pressure regardless of atmospheric pressure. These configurations are called absolute pressure gauges. Different configurations are appropriate for different applications.

Air Pressure Gauges Informational Video