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Air Pressure Gauges

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An air pressure gauge is a device used to measure the air pressure exerted by the air or other similar gasses. This device is mechanical and translates a pneumatic system’s force into a visual dial indicator calibrated for representing the air pressure. 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

Irving, TX  |  800-540-3050

DuraChoice Co. specializes in design, manufacturing, and distribution of valves, fitting, and related products for commercial and industrial uses. We offer a variety of products including stainless steel and brass ball valves, gate valves, stainless steel and brass fittings, butterfly valves, industrial valves and fittings, and OEM and special products. We are located in Irving, Texas but serve customers nationwide. Visit our website or call us today for more information about our products!

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DuraChoice Co. $$$

Minden, NV  |  775-782-1026

Looking for quality pressure gauges to measure a gas or liquid pressure? Perma-Cal Industries, Inc manufactures a comprehensive line of affordable high quality pressure gauges for a variety of demanding commercial and industrial applications. All Perma-Cal Industries pressure gauges are manufactured with dependability, safety and affordability in mind. Call us today!

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Perma-Cal® Industries, Inc. $$$

Sturtevant, WI  |  262-886-2895

SIKA USA is a developer and manufacturer of pressure gauges and a wide variety of other measuring and monitoring systems. We offer both standard pressure gauges and bourdon tube pressure gauges. Our pressure gauges are made with high-quality materials meant to withstand their environments and read accurately every time. Our pressure gauges are EN 837-1 compliant and are encased in stainless steel. They also come in different sizes, so finding one to fit your needs is simple.

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Lake Villa, IL  |  800-876-0036

M & M Control Service, Inc. is a leading distributor of industrial pneumatic, electronic, and self-contained valves, controls and controllers, instrumentation, temperature regulators, and process control loop equipment products and process solutions. We represent the top manufacturers in the industry. We bring you the best products at the best prices, delivered from stock or direct from the factories. We aim to exceed our customers' expectations, with continuously improved service, quality products, competitive prices and the fastest delivery. Our personal service staff is the best in the business and is committed to ensuring that your needs are met. Our commitment to quality products and exceptional customer service is renowned in the industry. M&M Control's sales engineers are factory trained to provide you with sizing, application, configuration, or installation assistance. For help with your application and for additional information on valves and steam products, gauges and thermometers, regulators, and controls and instrumentation call M&M Control at 1-800-876-0036. Visit our Web site at or E-mail

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M & M Control Service Inc. $$$
placeholder image DuraChoice Co. Perma-Cal® Industries, Inc. SIKA USA M & M Control Service Inc.

Working Principle of Air Pressure Switches

The air compressor pressure switch contains a pressure switch relief valve. This valve assists the machine in easier starting without hassle by releasing line and head pressure. There are various air pressure switches existing, and each one varies in working features. However, the simple operation of switches is still the same in all devices. Once the air compressor is powered, the operator can shift the level to automatic position. Due to this act, the motor starts, while at the same instant, the compressor is pressurized. A pressure system is attained in the device as a result.

air pressure switches

Due to this pressure setting, a diaphragm (inside) breaks the circuit then stops the motor. Simultaneously, back pressure moves out via the pressure relief valve. The pressure drops to a specific level because of the air applied in the process. Again, the motor runs once the contacts become closed. This process goes on until the air compressor is now in use.

How to Select an Air Switch

These are the considerations when selecting an air switch:

  • Select an action (either latching or non-latching)
  • Select the number of switches, rating, and contacts depending on what is to be switched (relay, motor, low voltage electronic board)
  • Select sensitivity: maximum working distance is related to length of PVC tubes between air button and air switch.
  • Select volume of air button: Small volume air buttons and long tubing must be avoided. Sensitivity decreases with an increase in rating. A high-rating air pressure switch can be used only with short distance tubes.
differential air pressure switches

How to Adjust an Air Pressure Switch

The air pressure switch adjusting feature is always inside the cover. Clockwise or counterclockwise turning of the main spring for decreasing or increasing cut out or cut in settings is the key adjustment instruction. The difference in the air compressor may be increased or decreased.

How to Test an Air Pressure Switch

Testing an air pressure switch has the following steps. They are

  • The key task to test the air pressure switch is to remove the power first. This is by unplugging the breaker.
  • Use a screwdriver to remove the cover of the switch. The center screw must be removed for the task.
  • Blue or brown wires which run from the switch to terminals block must be cut. However, the white and black wires which are meant for power purposes must not be cut.
  • The next step is to provide pressure to the switch by use of pressure-producing sources.
  • Then, set ohmmeter probes to the loose wires. The switch must be closed during air application. The ohmmeter displays zero ohms when the switch closes, thus indicating the fine status of air pressure.
  • Finally, the air pressure switch is adjusted using the set point screw.

Applications of Air Pressure Switches

The air pressure switch works in numerous industries for different applications. The air pressure switch is used to give electrical feedback by measuring rising and falling temperatures of systems.

The air pressure switch has its use in many industrial control systems such as below:

Compressed Air Systems

It is because the compressing function does not touch the height it is expected to if the pressure switch doesn’t work well.

HVAC Equipment

Both cooling and heating features are offered by HVAC equipment which can be found in commercial and residential buildings. The air pressure switches are available in HVAC equipment for safety reasons. In the HVAC equipment, air pressure switches assist in sensing maximum and minimum set points. The feature is available in air conditioning systems. This feature assists the system to stop or start based on the set point level.

air compressor switch

Process Equipment

Air pressure switches are widely applied in manufacturing sectors. Air pressure switches assist manufacturing sectors and industries in achieving goals without any gap. The production efficiency in any manufacturing sector is attained by the pressure switch. These switches guarantee a fluid supply and constant gas for continuous working of systems in the industries.

Pumping System

Guaranteeing a water level in the pump is the main purpose of air pressure. Due to the air pressure switch, water pumps are activated and deactivated based on the set points.

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