Switches • Pressure Switches

A pressure switch is used to make electrical contact when a certain set pressure has been reached on the switch's input.

A pressure switch is a type of switch that makes electrical contact when a certain preset pressure has been reached on its input. The switch may be designed to make contact either on pressure rise or on pressure fall.There are two types of pressure switches: pneumatic and hydraulic.Uses of pneumatic pressure switches include switching off an electrically-driven gas compressor when a set pressure is achieved in a reservoir; and switching off a gas compressor when there is no feed in the suction stage.Hydraulic pressure switches are used within automobile applications, such as switching on a warning light if engine oil pressure falls below a certain level. These switches also turn brake lights on automatically by detecting a rise in pressure within hydraulic brake pipes.

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  • Wasco, Inc.

    Wasco Inc. manufactures standard, super purity, ultra high-purity, economical, and high, low and dual pressure switches. The company's miniature switches are in the 1 to 500 psi range, or 1 to 100 psi range.

  • Hydra-Electric

    Hydra Electric manufactures durable gage or absolute pressure switches for pneumatic, fuel or lube oil system applications. Suitable for extreme temperature environments these pressure switches feature fireproof design, welded all stainless steel construction with a hermetically sealed electrical switching element.

  • Value Engineered Products

    Value Engineered Products manufactures eight series of pressure switches. The company's most popular line is its 670 Series, which features a 1 1/8 square body and are constructed of aluminum or stainless steel. The switches also range in pressure from 1.5 psig to 400 psig.

  • Grainger Industrial Supply

    Grainger distributes pressure switches manufactured by Square D (Schneider Electric), Condor USA Inc., Dayton, Ashcroft, Dwyer Instruments, and Mercoid. Types include air compressor, water pump, air compressor/water pump combo, machine tool, industrial, differential, weather proof and explosion proof, and dual stage.

  • Gems Sensors & Controls

    Gems Sensors & Control designs and manufactures subminiature pressure switches and miniature pressure switches. The subminiature switches feature a pressure range of 0.75 to 6000 psi, and proof pressures up to 7500 psi. The miniature pressure switches feature proof pressures of 350 psi, 6000 psi, 3000 psi, or 4500 psi. The switches' pressure range varies from 3.5 to 1750 psi. The company's pressure switches are used for the filtering process of coolants in the machine tool industry. They are also used in transmissions of off-highway vehicles and as redundant systems with existing monitors.

  • Omega Engineering, Inc.

    Omega Engineering manufactures miniature, general purpose industrial, low pressure, harsh environment, solid state and digital, and hazardous location pressure switches.

  • Airtrol Components, Inc.

    Airtrol's line of pressure switches includes a variety of board mount, low deadband and adjustable deadband configurations. Four mounting styles, plus a wide variety of options including gold contacts, factory pre-set and special deadbands, make the F-4200 series an excellent choice for the O.E.M.

  • SOR, Inc.

    SOR Inc. designs and manufactures a number of pressure switches including: weather proof, explosion proof, hermetically sealed, miniature hermetically sealed, adjustable deadband, subminiature hermetically sealed, pivot seal, electronic, and bourdon tube pressure switches.

  • DesignFlex Switches, a World Magnetics Co

    DesignFlex Switches manufactures low current and high current pressure switches. The company's PSF 103 high-current pressure switch feature field adjustable pressure set point from 3" H20 to 60 psi.  The switches feature an operating temperature of 40F to 150F.

  • Ives Equipment Corp.

    Ives Equipment Corp. is a US based stocking distributor of industrial parts and components. Product offerings include pressure switches as well as other pressure related instruments and pressure gauges.

  • MAMCO Precision Switches

    MAMCO Precision Switches manufactures air compressor, water pump, standard and differential pressure switches. The company's standard and differential pressure switches are used for a variety of OEM applications and have the ability to operate in harsh environments at various pressures.

  • Micro Pneumatic Logic, Inc.

    Micro Pneumatic Logic Inc. designs six series of pressure switches. The 500 Series is sensitive to as low as 0.10 in/H20, while the 600 Series features snap-action switching for higher current capacity. The company's 800 Series is designed for actuation between 10 psi and 250 psi, and the 2000 Series is a low-cost push button switch rated to 3/4 HP. The 4100 Series features a calibration system that enables accurate setting from 1 bar to 45 bar.

  • Dwyer Instruments, Inc.

    Dwyer Instruments Inc. manufactures a number of pressure switches including: explosion-proof diaphragm-operated, weatherproof diapahragm-operated, low cost OEM, economical, subminiature, durable, miniature, and many others. There are nearly two dozen pressure switch configurations to choose from.

  • Ashcroft, Inc.

    Ashcroft Inc. manufactures differential industrial pressure switches and 13 general-purpose pressure switches. The industrial pressure switches feature ranges from 30 to 600 psid; and are used within most industrial and process applications including food plants, offshore rigs, and paper mills. The company's 13 general purpose pressure switch models are for OEM industrial and process applications.


  • Honeywell Sensing and Control

    Honeywell Sensing & Control manufactures pressure switches that are and factory set from 0.5 psi to 3000 psi, and can operate with a number of materials including air, motor/transmission oils, jet fuels, and other hydrocarbons. Engineered with or without a dead band, the various pressure switches feature operating pressures of 150 psi, 200 psi, or 250 psi. Proof pressures of each switch are 350 psi or 500 psi, with burst pressures of 500 psi, 750 psi, and 1250 psi.

  • Hydracon Subsea

    Hydracon Subsea engineers and manufactures pressure switches for deep water drilling controls. The 2406 Series of pressure switches use zero power with 2 wires and can operate in ocean submersion up to 20,000 feet deep. The switches feature operating pressure of 0 to 3000 psid, and switching voltage of up to 500 volts. The company's 2401 and 2402 Series pressures switches are designed for offshore oil industry applications, and feature a hermetic electric switch module that's comprised of stainless steel housing and is electron beam welded.

  • Schneider Electric

    Schneider Electric manufactures NEMA Square D electromechanical-rated pressure switches and OsiSense electronic pressure switches. The Class 9012 Square D switches are used in pneumatic or hydraulic systems to protect equipment and control/monitor system pressure. The Class 9013 Square D switches are used to control electrically-driven water pumps and air compressors. Depending on type and model the Square D switches feature a pressure range of 0 to 9000 psi. The OsiSense electronic pressure switches control/regulate pressure in fluid, water, hydraulic or pneumatic systems from -14.5 psi to 8,700 psi. These switches are protected against overpressure, short circuits, and reverse polarity. They also feature a self-diagnostic function.

  • Tecmark

    Tecmark designs and manufactures three series of pressure switches. The 3000 Series features pressure ranges from 2" WC to 100 psi, and is used to interlock devices to sense air, gas or water pressure at a specific point. The 3900 Series- used in pilot duty applications - features pressure ranges as low as 6" WC up to 5 psi. This series of switches are available in plated steel, stainless steel or injection molded plastic materials. The 4000 Series converts a pressure signal to an electrical output, and features pressure ranges from 2" WC up to 11 psi.

  • Barksdale, Inc.

    Barksdale Inc. is a manufacturer diaphragm, dia-seal piston, sealed piston, bourdon tube, vacuum, and differential-type pressure switches. The diaphragm pressure switches are available as single, dual and triple setting units, with pressure up to 150 psi. The dia-seal piston pressure switches feature pressures up to 1600 psi, while the sealed piston pressure switches are for use in rugged hydraulic applications. Bourdon tube pressure switches are used for high pressure applications up to 18,000 psi. The differential switch models are for applications where there are fewer than 25 cycles per minute.

  • MidWest Instruments

    MidWest Instruments manufactures four types of pressure switches: piston, diaphragm, hazardous location, and bellows/bourdon. The piston type pressure switches have a maximum working pressure of 3000 to 10,000 psig, while the diaphragm type switches are capable of 3000 psig. The hazardous location pressure switches feature a maximum DP range of 100 psid and maximum working pressure of up to 4000 psig. The bourdon tube pressure switches can work at pressures up to 6000 psig.