presair

PCB Mount Vacuum Switches

PCB mount vacuum switches are miniature single-pole or double-pole units designed for applications requiring moderate accuracy. These compact switches offer vacuum sensing ranges from 6 to 200 inches of water gauge (IN.W.G.). The actuation point is specified by the customer and factory set by Presair, with the vacuum setting clearly marked on the switch housing.

Select models include field adjustment capability to support flexible integration into various system designs.

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.

PCB mount vacuum switches are single-function controls with internal electrical contacts, designed for direct installation on printed circuit boards. These compact switches feature momentary switching logic and provide pneumatic actuation within electronic control circuits.

Their small size and range of connection styles allow easy integration into tight spaces and PCB-based designs. While intended for board mounting, these switches can also be retrofitted into other systems using wire leads. Vacuum sensing is available from 6 to 200 inches of water.

Specifications

  • Factory set vacuum range: 6 to 200 inches of water
  • Select models available with field adjustment
  • Differential sensing capability available
  • Single Pole Single Throw (SPST); DPST models also available
  • UL / cUL Recognized
  • Variety of mounting and air connection configurations

Part Number Configurations

Below is a complete list of part number configurations from the Presair catalog. Click on any part number to view detailed product information.

Custom configurations are also available. Contact us with your requirements for more information.

Mounting Options & Air Connections

Presair switches are available with a variety of mounting options and air connection configurations to meet the requirements of original equipment manufacturers.

Explore the available solutions below or contact us to request a custom configuration.

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 used in medical and industrial applications where compact vacuum sensing is required.

Industrial

Cross Reference

To support system design decisions, we’ve compared Presair’s vacuum switches with other leading products in the market, highlighting differences in design, function, and performance.

Find further details by visiting  this link.



BRANDS

PRESAIR

C Series

HERGA

6761 & 6763 Series

OMEGA ENGINEERING

PSW23V Series

(Obsolete)

TECMARK

PCB Series

BINGO SENSORS

PS-LA5

Open/Close on Vacuum Rise/Fall

Adjustable Vacuum

Vacuum Range 6 inches of water to 200 inches of water

Plastic Construction

Variety of Diaphragm Materials

Silicone Only

Silicone Only

Multiple Mounting Options & Air Connections

Rated up to 1 Amp @ 250VAC

SPST & DPST

SPST Only

SPST Only

SPST Only

SPST Only

UL / cUL Recognized

Made in U.S.A.

Frequently Asked Questions

YOUR QUESTIONS, ANSWERED.

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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