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Vacuum Switches

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As a safe and cost-effective alternative to safety relief valves, vacuum switches are able to work with gas, electric current and liquid pressure situations, individually or in a combination. In addition, pressure vacuum switches will detect when a problem, such as leaking pressure during operation, is happening and will shut down the process until the trouble is fixed and an operator restarts the operation. Read More…

Vacuum Switches Vacuum switches help regulate the pressure between two closed cavities by converting a negative pressure signal to an electrical output.
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Leading Manufacturers

Mentor, OH  |  440-205-7600

Tecmark is a designer and manufacturer of remotely actuated controls used by OEMs worldwide. We offer an extensive line of high pressure switches, and our customer service representatives will help you find the perfect model for your application. Whether you are looking for an in-house solution, or an industry need, we continue to develop technological advancements.

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Tecmark Corporation $$$

Burbank, CA  |  818-843-6211

Designing, developing and manufacturing pressure switches (and other products) is what Hydra-Electric does. Our pressure switch selection includes vacuum, gage, absolute and differential pressure switches.

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Hydra-Electric Company $$$

Boca Raton, FL  |  800-473-7313

For over eighty years, SUCO Technologies has been supplying customers with high quality Mechanical Pressure Switches, Vacuum Switches and Electronic Pressure Switches. Our products are designed to handle different situations and are useful in applications such as Filters, Generators, Off-Road Equipment, Compressors, Turbines, Water Applications and more. Call SUCO today for assistance with your next project.

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SUCO Technologies, Inc. $$$

Sterling Heights, MI  |  800-648-5778

Mid-West Instrument complies with the requirements of CSA B51-09. We have differential pressure gauges, flow measurement products, switches and accessories. In 1958 we began with producing leak testing instruments and have since introduced low differential and high working pressure gauges as well as pneumatic and hydraulic test and burst equipment.

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Mid-West Instrument $$$

Attleboro, MA  |  508-236-3800

Sensata Technologies (formerly Texas Instruments) is a manufacturer of pressure switches—used in automobiles (air conditioner, engine oil, power steering, transmission), HVAC/R and industrial applications

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Sensata Technologies, Inc. $$$
placeholder image Tecmark Corporation Hydra-Electric Company SUCO Technologies, Inc. Mid-West Instrument Sensata Technologies, Inc.

Corrosion-resistant and long-lasting, vacuum switches provide control stability through inconsistent conditions and assure continuous service even under extreme shock and vibration. Often used to control and monitor various processes, vacuum switches are also commonly used in applications as an interlock device to sense gas, air or water pressure at a specific point, vacuum pressure switches provide on and off control of waste oil heating systems, residential boilers, electric heaters, pumps, small air compressors and transmission systems.

Industries that utilize vacuum switches include food processing, aerospace, chemical processing, residential, industrial, commercial, heating and cooling, electronics and pharmaceutical. Automotive vacuum switches are the most common type of vacuum switches, and are used to regulate the flow of engine fluid.

Vacuum switches respond to a change in negative pressure. If a change is signaled, an elastomeric diaphragm opens or closes an electrical circuit based on a predetermined pressure set point and activates the vacuums switch. The movement of the diaphragm actuates a single snap acting switch, a mechanical switch that causes a rapid transfer of contacts from one position to another.

When actuated, the snap acting switch converts the negative pressure signal into an electrical signal. An elastomeric diaphragm eliminates the need for an oil barrier because they separate pressure instruments from the process media, while allowing the instruments to sense the process pressure. A vacuum switch is set to a certain point of pressure to which it will automatically respond. Field adjustable pressure set points allow the vacuum pressure switch to be calibrated to the correct pressure points for opening and closing the diaphragm.

There are three main vacuum switch designs: mechanical, pneumatic and electronic. In the mechanical and pneumatic versions, an elastomeric diaphragm reacts to changes in the pressure level and actuates either a mechanical switch or a valve. In the electric version, a piezoresistive pressure sensor measures the pressure level and converts the level into an electrical signal.

Construction materials vary depending on the applications and vacuum switches materials are wide-ranging including brass, polycarbonate, plated steel, glass reinforced polyester, polyvinyl chloride and cast aluminum.

Vacuum Switches Informational Video