Tinytrol Miniature Vacuum Switches

Tinytrol Miniature Vacuum Switches can be factory set from 2.5 inches of water to 300 inches of water. Available in a variety of air connects, mounting & electrical ratings.

Factory set vacuum switches are designed and manufactured to exacting standards to meet the needs of original equipment manufacturers and instrument makers for low cost, stable switches & good repeat accuracy. 


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


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


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


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

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

Their miniature size & variety of connection styles for simple implementation into any system. These switches allow for simple electrical on/off control over vacuum. As vacuum rises or falls, one contact opens as the other closes. This provides a perfect solution for monitoring, controlling, & notifying. Tinytrol Miniature Vacuum Switches are preset at the factory to actuate at your specific requirements.

  • Variety of mounting options available
  • Factory Set Vacuum Range 2.5 inches of water to 300 inches of water.
  • Ratings up to 25A @ 250VAC; Gold Contacts Available
  • SPDT or DPDT Models Available
  • UL/cUL Recognized
  • Acetal body
  • Multiple diaphragm materials available to meet application requirements.

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

1/8 NPT Only
Radial Mount with 1/8″ O.D. Side Air Spout

Common Applications

Presair’s Tinytrol Miniature vacuum switches are commonly found in medical & industrial applications.


Cross Reference

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Tinytrol Series


HPS Series


V4000 Series


V4000 Series

Fixed Vacuum Set Point Range 2.5 to 300 inches of water

Open/Close on Vacuum Rise/Fall

Max. Vacuum = 350 inches of water

Rated up to 25 Amps @ 250VAC



Multiple Mounting Options & Air Connections

Plastic Construction

Multiple Diaphragm Materials

UL / cUL Recognized

Made in U.S.A.

Frequently Asked Questions


Are the Tinytrol Vacuum Switches adjustable?

No. Tinytrol Vacuum Switches are factory set between 0.25-300 inches of water.

My application will expose the switch to hazardous chemicals and/or gases. How will this affect the switch’s performance?

We offer a variety of diaphragm material options to meet different application needs. 

Here’s a guide to the different options available.

My application has a small or large amount of current. What are the vacuum switch ratings?

We offer a variety of micro switch options to meet application requirements up to 25 Amps @ 240VAC. Learn more  here!

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

Vacuum 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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