PRESAIR
Sensitive Differential Switches
Sensitive differential switches are the perfect for those needing a sensitive, low pressure switch at an affordable price. These switches sense very low pressures, such as less than an inch of water, (Range = 0.25 inches of water to 35 inches of water). For a frame of reference, a trumpet player blows 55 inches of water (or 2 Psi) on average, so these switches are very sensitive.
Our sensitive differential switch can be setup to sense either pressure, vacuum, or the difference between two sources of pressure or vacuum.
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 can be adapted to pressure or vacuum switches, or as differential pressure switches. These switches are field adjustable or can be factory set from 0.25 inches of water to 35 inches of water.
The switches can respond to rapid pulsing & their gold-plated silver contacts will handle low level switching currents
These “slow make, slow break” switches can respond to rapid pulsing & the gold plated silver contacts will handle low level switching currents. Optional adjustable air bleeds can be supplied on either side of the diaphragm for pulse-sensing application safe edges or bellows.
Product Specifications
- 0.25 – 15 inches of water Adjustable Range. Factory set options available.
- SPST
- 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 operations.
