PCB Mount Vacuum Switches

Miniature single pole and double pole switches used as printed circuit board (PCB) mount vacuum switches work well where moderate accuracy is sufficient. Vacuum ranges: 6 IN.W.G. to 200 W.G. Vacuum setting marked on switch in inches water gauge. Actuation point is customer specified & set at the Presair factory.

Some models allow field adjustment.

custom options

Wide variety of options available to meet original equipment manufacturers product requirements.

high quality

Highly stable with good repeat accuracy. All switches are 100% tested at high & low settings, & at proof pressure.

safe & economical

Remote operation with complete electrical isolation. UL Recognized. Costs less than conventional controls.

made in u.s.a.

Presair switches are designed & manufactured in Eau Claire, Wisconsin U.S.A.

The PCB mount vacuum switches are single function controls with internal electrical contacts designed to mount directly to a printed circuit board. These basic component switches feature momentary switching logic in a compact design to add pneumatic actuation to any electronic control circuit.

These versatile switches are a great choice for many applications due to their small size & variety of connection styles. Although these switches are built to connect to a printed circuit board, they can also be retrofittted for nearly any application by connecting wire leads. These switches can sense vacuum ranging from 6 inches of water all the way up to 200 inches of water.

  • Variety of mounting & air connections available
  • Factory set vacuum range of 6 inches of water to 200 inches of water. Some field adjustable models available.
  • Differential Sensing Available
  • Single Pole, Single Throw Circuit. DPST models available.
  • UL / cUL Recognized

Part Number Configurations

Here is a complete list of part number configurations already listed in our catalog. Click on a part number below for more information.

Other custom part number options are available. Please contact us with your requirements for more information.

Mounting Options & Air Connections

Presair switches have a variety of mounting options & air connections available to meet the needs of original equipment manufactures.

See our readily available solutions below, or send a request for a custom option to

Low Profile Radial Mount with (2) 1/8″ O.D. Side Air Spouts (Differential Pressure Sensing Available)
1/8 NPT
9/16″-18UNF Threaded Mount with 1/8″ O.D. Center Air Spout & Side Air Spout (Differential Pressure Sensing Available)

Common Applications

Presair’s printed circuit board mount vacuum switches are commonly found in medical & industrial applications.


Cross Reference

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C Series


6761 & 6763 Series


PSW23V Series



PCB Series



Open/Close on Vacuum Rise/Fall

Adjustable or Fixed Vacuum Set Point 6 inches of water to 200 inches of water

Fixed Only

Plastic Construction

Variety of Diaphragm Materials

Silicone Only

Silicone Only

Multiple Mounting Options & Air Connections

Rated up to 1 Amp @ 250VAC






UL / cUL Recognized

Made in U.S.A.

Frequently Asked Questions


What is a printed circuit board (PCB) mount switch?

A PCB switch is a type of electrical switch that connect directly to a circuit board, and upon actuation at a specified range it turns on/off the application system it is connected with. Wire leads are also available for other applications where the PCB switch’s compact design is necessary.

Do you offer a double pole, single throw (DPST) PCB switch?

Yes. Contact our customer service team here for more information.

My application will expose the switch to hazardous chemicals and/or gases. How will the switch perform?

We offer a variety of diaphragm material options to meet different application needs.   Here’s a guide to the different options available.

What do you mean by inches of water rising / falling?

Pressure switches are measured by inches of water, or inches of mercury. Once the switch rises or falls the contacts will open and close based on the hysteresis, or deadband.

Read a more    detailed explanation here.

What’s the difference between a pressure and vacuum switch?

Pressure switches push against the diaphragm & plunger inside the switch versus a vacuum switch pulls the diaphragm away from the plunger inside the switch. Another way to think of vacuum switches is a negative pressure switch.    Here’s an illustration to help!

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