Pressure Switches

Field Adjustable or Factory Set Pressure Switches


Presair pressure switches make electrical contact when a certain set pressure has been reached on its input.

By providing on/off switching from a pneumatic source, Presair pressure switches deliver critical benefits:

  • Safe and Convenient: Remote operation with complete electrical isolation. UL Recognized.
  • Economical: Costs less than conventional controls
  • Accurate: Highly stable with good repeat accuracy. All switches are 100% tested at high and low settings and at proof pressure.
  • Reliable: Minimal moisture absorption and maximal dimensional stability.

To learn more about Presair’s pressure switching solutions visit our online store, or contact us!

Purchase pressure switches  Contact us about pressure switches.

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Tinytrol MIniature Pressure Switch

Tinytrol® – Miniature Pressure Switch

Tinytrol pressure switches provide versatile and convenient sensing. Their miniature size and variety of connection styles for simple implementation into any system. These switches allow for simple electrical on/off control over pressure. As pressure rises or falls, one contact opens as the other closes. This provides a perfect solution for monitoring, controlling, and notifying. 

Miniature pressure switches are factory set, from .25 PSIG to 65                                                   PSIG. Some models are field adjustable. Adaptor available to                                                         enable Tinytrol® retrofit for certain competitors’ models with small                                                   diameter mounting thread.

                                                Rating: 1 AMP to 25 AMPS. Horsepower rating to 1 HP @ 120                                                       VAC; 2 HP @ 240 VAC

 Materials: Acetal body; diaphragms available in various materials:  nitrile, silicon, neoprene, EPDM, etc.

 Click below to view more Tinytrol Pressure Switch product  details.

Factory Set Pressure Switch        Purchase Factory Set Pressure Switch


Adjustable Pressure Switch
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Adjustable Pressure Switches

Presair’s adjustable pressure switch is field adjustable from 1.5 inches of water to 125 Psi. The adjustable range is 10% to 25% lower on falling pressure, although special differentials are available. Dual pressures switches available and can be factory set to allow each snap action switch to operate at a different pressure setting.

These switches allow for simple electrical on/off control over pressures and vacuums. As pressure goes up, one contact opens as the other closes. This provides a perfect solution for monitoring, controlling, and notifying. 

Click here to learn more about our pressure monitoring products.

Rating: 1 HP @ 125 VAC; 2 HP @ 250 VAC. Also available to 25 AMPS.

Materials: Acetal body and mechanism; diaphragm available in various materials: nitrile, neoprene, vitron, EPDM and silicon rubber; stainless or zinc plated steel screws; stainless steel springs

Click below to view more adjustable pressure switch product details.

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PC Board Mount Pressure Switch

PC Board Mount Switch

PC Board Mount Pressure Switch

Printed circuit board mount pressure switches are miniature single pole and double pole switches used as pressure switches where moderate accuracy is sufficient. Pressure ranges: 6 IN.W.G. to 65 PSIG. Pressure setting marked on switch in inches water gauge. Actuation point is customer specified and set at the Presair factory. Some models allow field adjustment.

                                                   Rating: 1 AMP resistive @ 250 VAC. Ratings are dependent on                                                      actuation pressure and must be de-rated at lower pressures. UL                                                      recognized for 100,000 operations.

                                                    Material: Rynite/acetal body, silicon diaphragm, gold pins and                                                         contacts, stainless steel springs and screws.

                                                    Click below to view more PCB pressure switch product details.

                                                    Printed Circuit Board Pressure Switch        Purchase PCB Pressure Switch


Sensitive Differential Switches
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Sensitive Differential Switch

Presair’s sensitive single pole switches can be adapted to pressure or vacuum switches, or as differential pressure switches. These switches are field adjustable or can be factory set from 0.25 inches of water to 35 inches of water.

These “slow make, slow break” switches can respond to rapid pulsing and the gold plated silver contacts will handle low level switching currents. Optional adjustable air bleeds can be supplied on either side of the diaphragm for pulse-sensing application safe edges or bellows.

Rating: 750 ma @ 250 VAC to 5 ma @ 3 VDC; 1 AMP @                                                          250 VAC to 5 ma @ 3 VDC. UL Recognized for 100,000 operations.

Material: Acetal body; EPDM diaphragm bonded to steel ring; other diaphragm materials are available; gold plated silver contacts; silver plated bronze springs; silver plated copper or brass terminals.

Click below to view more sensitive differential pressure switch product details.

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