PRESAIR
Adjustable Pressure Switches
Presair manufactures adjustable pressure switches designed for field adjustment across a wide range of applications. These switches allow users to set pressure parameters directly in the field to meet specific project requirements.
Each unit is built to precise standards to support the needs of original equipment manufacturers and instrument builders seeking low-cost, stable performance with consistent repeat accuracy.
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
mae in u.s.a.
Presair switches are designed & manufactured in Eau Claire, Wisconsin U.S.A.
Presair manufactures adjustable pressure switches for field-set applications across a wide range of industries. These switches allow users to set pressure parameters directly to match specific system requirements. Designed and built to precise standards, they meet the needs of OEMs and instrument manufacturers requiring low-cost, stable performance with consistent repeat accuracy.
Adjustable pressure switches provide simple electrical on/off control based on system pressure. As pressure increases or decreases, one contact opens while the other closes, enabling accurate pressure monitoring and control. All models are field adjustable using the hex screw located at the center of the switch and can be factory preset upon request.
Dual-switch configurations are available, factory set to activate two separate microswitches at different pressure levels. Multiple body styles and air connection options are offered to support various installation requirements.
Presair standard pressure switches feature a ±10% dead band. Custom dead band tolerances are available for tighter or wider switching ranges.
Specifications
- Adjustable pressure range: 2.5 inches of water to 125 PSIG
- Proof pressure tested up to 200 PSIG
- SPDT or DPDT contact forms
- Ratings up to 25A @ 250 VAC
- Gold contact options available
- UL & cUL Recognized
- Variety of mounting and connection configurations available
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 specifications.
Custom configurations are also available. Contact us with your requirements for more information.
Mounting Options & Air Connections
Presair switches are available with a range of mounting options and air connection configurations to meet the requirements of original equipment manufacturers.
Select from the available solutions below or contact us to request a custom configuration.
1/8 NPT – 9/16″ Threaded Mount with 1/8″ I.D. Center Air Spout
Radial Mount with 1/8″ I.D. Side Air Spout
9/16″ Threaded Mount with 1/8″ I.D. Center Air Spout
Direct Mount with 1/8″ I.D. Center Air Spout
1/8″ NPT Only
Cross Reference
We are certain of our position at the top so we’re comparing our product with other top products in the marketplace today.
Find further details by visiting this link.
BRANDS
PRESAIR
P Series
HERGA
6741 & 6742 Series
TECMARK
3000 Series
Omega Engineering
PSW21 & PSW22 Series
(Obsolete)
LEFOO
LF25 Series
Adjustable of Fixed Pressure Range of 2.5 inches of water – 125 PSI
Max. Operating Pressure = 200 PSI
Multiple Mounting Options & Air Connections
Plastic Construction
Multiple Diaphragm Material Options
Rated up to 25 Amps @ 250VAC
SPDT
DPDT
UL/cUL Recognized
Made in U.S.A.
Frequently Asked Questions
YOU’RE QUESTIONS, ANSWERED.
There is a hex screw for adjustment. Turn clockwise or counterclockwise to set the switch at your desired pressure point. Click here for more information.
Yes! We can factory set your pressure switch to your desired set point if you choose with both our Tinytrol Pressure Switches that have a smaller, compact design up to 65 PSI, and our adjustable pressure switches are also available as a fixed option up to 125 PSI.
We offer a variety of diaphragm material options to meet different application needs.
Here’s a guide to the different options available.
We offer a protective switch cover for these environments. See how it works here!
We offer a variety of micro switch options to meet application requirements up to 25 Amps @ 240VAC. Learn more here!
Pressure switches are measured by inches of water, or PSI. Once the switch rises or falls the contacts will open and close based on the hysteresis, or deadband.
Read a more detailed explanation here.
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!
Very likely. Check out our cross reference guide here.
Request A Quote
Complete the form below with your application information, and a product specialist with follow up with you in 1-2 business days.