Low Pressure Switches

A reliable source for Pressure Switch information and leading Pressure Switch Companies & Manufacturers.

Used for negative, positive and differential pressure applications, low pressure switches can be designed to function for liquid and/or gaseous materials. Read More…

Low Pressure Switches Low pressure switches, also referred to as light pressure switches, are used to sense changes in hydraulic or pneumatic input pressure, specifically if the pressure falls below or rises above the set pressure point, and to respond by making electrical contact, either through switching on or off.

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.

Low pressure switches are used in a wide range of industries including: the aviation industry, where they are essential for many hydraulic applications; chemical processing industries for sensitive material handling applications; laboratory or research industries for accurate testing; and wastewater systems for fast and efficient system control.

Designed to actuate in response to minute, small and reduced pressure situations, low pressure switches react solely in direct correlation to the pressure of the system. Advantageous for systems such as pneumatic, plumbing, foam processing, sewer and steam, all of which can and often do operate at low pressures, low pressure switches can offer features such as explosion proof, adjustable and electronic in order to better fit the required application.

Low pressure switches are designed to regulate material flow within pressure systems. In order to be responsive to pressure changes, low pressure systems are constructed using materials such as diaphragms and sometimes piezoelectric crystals. Diaphragms respond to pressure fluctuation because when the flow exceeds the set point, the diaphragm will be pushed open and the medium will flow through.

Piezoelectric crystals respond to pressure changes because when they are pressed or released, they produce a voltage that is used to actuate the switch. There are three main types of low pressure switches: negative, positive and differential. Negative low pressure switches function by converting the negative pressure signal to an electrical output; thus the switch is designed to respond only changes in the negative pressure chamber.

Positive low pressure switches function in much the same way; essentially, they work by converting the positive pressure signal to an electrical output, thus only responding to changes in the positive pressure chamber. Differential low pressure switches, however, function in a significantly different manner. These switches work by measuring or regulating between two points of differing pressure and actuate based on a set point. Differential low pressure switches are extremely sensitive to any changes in pressure, no matter if the pressure is negative or positive.

Low Pressure Switches Informational Video