PRESAIR
Sensitive Differential Switches
Presair’s sensitive differential switches provide accurate low-pressure sensing for applications requiring precise detection at minimal cost. These switches operate within a narrow pressure range of 0.25 to 35 inches of water, making them ideal for systems that require highly sensitive actuation.
Each switch can be configured to sense pressure, vacuum, or the differential between two separate pressure or vacuum sources. These sensitive differential switches support a wide range of industrial, medical, and instrumentation applications where low-pressure responsiveness is critical.
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.
Presair’s sensitive single pole switches function as pressure, vacuum, or differential pressure switches. These switches are available as field adjustable or factory set, with sensing ranges from 0.25 to 35 inches of water.
Designed for pulse-responsive applications, the switches feature slow-make, slow-break actuation and gold-plated silver contacts that support low-level switching currents. Optional adjustable air bleeds can be installed on either side of the diaphragm to support edge detection, bellows, or other pulse-sensing requirements.
Product Specifications
- Adjustable pressure range: 0.25 – 15 inches of water (factory set options available)
- SPST (Single Pole Single Throw)
- Electrical rating: 750 mA @ 250 VAC to 5 mA @ 3 VDC; 1 AMP @ 250 VAC to 5 mA @ 3 VDC
- UL / cUL recognized for 100,000 cycles
