Differential Pressure Switch

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In a given application a differential pressure switch may be used to maintain a disparity of pressure in separate parts of a system, or to keep the pressure in various parts of a system equalized. Read More…

Differential Pressure Switch Differential pressure switches sense changes in the relative pressure between two points and respond in a specified way. Differential pressure is one of the several types of measurement that are available for pressure switches.

Leading Manufacturers

Mentor, OH  |  440-205-7600

We manufacture unprecedented pressure switches. These top of the line devices are strong and highly proficient. If you are in need of sophisticated items then our engineers will assist you with our processes to discover the best product for your application. Our pressure switches are great for: electric/gas heaters, pumps, small air compressors, electric strip heaters in VAV systems, waste oil heating systems and more.

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Tecmark Corporation $$$

Pittsburgh, PA  |  412-788-2830

Since 1980, KOBOLD has been a leading manufacturer of high-quality pressure switches, gauges and transmitters. KOBOLD brings to you 25 years of experience, excellent customer service and FREE technical support. Call today or visit our website for all of your instrumentation needs. Our highly trained engineers and sales team can find the optimal solution for even the most demanding applications.

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KOBOLD Instruments Inc. $$$

Oneonta, NY  |  866-395-2902

At MAMCO Precision Switches, we have pressure switches of the highest quality. MAMCO quality products will not have the leakage problems or set point instability that others can have. With our expansive inventory, we manufacture and extensive line of products so that all needs can be met. Our competitively priced products and outstanding customer service are ready to serve you, please call!

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MAMCO Precision Switches $$$

Stratford, CT  |  203-378-8281

Ashcroft® manufactures a full line of high quality pressure switches for the shutdown and control of various types of processes. Ashcroft® switches meet application needs for industries such as off-road equipment, generators, compressors and many more. As the leader in technology and innovations, we design our products based on our customer’s requirements.

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Ashcroft® Inc. $$$

Lenexa, KS  |  800-676-6794

SOR® manufactures a full line of pressure, differential pressure, temperature, vacuum and level switches that are certified fit for use in SIL (Safety Integrity Level) environments. We are one of only a few manufacturers to offer its entire range of switches certified to the IEC 61508 standard. Our fundamentals include superior quality, excellent service and quick delivery.

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SOR Inc. $$$
placeholder image Tecmark Corporation KOBOLD Instruments Inc. MAMCO Precision Switches Ashcroft® Inc. SOR Inc.

Differential pressure switches simultaneously measure the pressures at two different places in a system and compare them to produce a differential pressure reading. If the pressure is the same at both points, then the differential pressure will read zero, but if there is a difference in pressure between the two points, then the differential pressure reading will quantify the difference in terms of pressure - usually atmospheres (atm), Pascals (Pa), pounds per square inch (PSI) or bar.

Differential pressure switches are programmed to react when the differential pressure rises or falls to a set actuation point, either signaling an alarm or automatically switching something on or off, for instance opening or closing dampers or louver, starting and stopping fans or motors and many other uses. Different kinds of differential pressure switches are designed to sense and react to changes in relative pressures of gases, liquids or both.

Differential pressure switches are useful in a variety of different applications. In airplanes they are used to monitor and regulate the differential between the cabin air pressure and the atmospheric pressure as it changes throughout the duration of the flight. Oil filters for internal combustion engines are regularly equipped with differential pressure switches to measure the change of pressure across the filter.

Differential switches can also be used to measure flow or level between connected pressurized systems or pressure vessels, since pressure tends to equalize within a free-flowing system. Differential pressure switches come in many forms, with or without either analog or digital displays, and in a variety of housing materials including acetal, brass, polycarbonate, plated steel, glass reinforced polyester, polyvinyl chloride and cast aluminum.

Electronic pressure switches are the most common type of differential switches because they are easy to program and suitable to a wide range of pressures. Electronic differential pressure switches function by measuring strain on two separate piezoresistive, piezoelectric, or magnetic sensors that are connected to a digital interface module that shows the relative pressure.

Differential pressure switches are important for the utility, automotive, aerospace, appliance, pneumatics and hydraulics industries because they are able to help manage the comparative pressures of different points within a system.

Differential Pressure Switches Informational Video