Field Adjustable or Factory Set Pressure Switches
Presair pressure switches make electrical contact when a certain set pressure has been reached on its input.
By providing on/off switching from a pneumatic source, Presair pressure switches deliver critical benefits:
- Safe and Convenient: Remote operation with complete electrical isolation. UL Recognized.
- Economical: Costs less than conventional controls
- Accurate: Highly stable with good repeat accuracy. All switches are 100% tested at high and low settings and at proof pressure.
- Reliable: Minimal moisture absorption and maximal dimensional stability.
Tinytrol pressure switches provide versatile and convenient sensing. Their miniature size and variety of connection styles for simple implementation into any system. These switches allow for simple electrical on/off control over pressure. As pressure rises or falls, one contact opens as the other closes. This provides a perfect solution for monitoring, controlling, and notifying.
Miniature pressure switches are factory set, from .25 PSIG to 65 PSIG. Some models are field adjustable. Adaptor available to enable Tinytrol® retrofit for certain competitors’ models with small diameter mounting thread.
Rating: 1 AMP to 25 AMPS. Horsepower rating to 1 HP @ 120 VAC; 2 HP @ 240 VAC
Materials: Acetal body; diaphragms available in various materials: nitrile, silicon, neoprene, EPDM, etc.
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Presair’s adjustable pressure switch is field adjustable from 1.5 inches of water to 125 Psi. The adjustable range is 10% to 25% lower on falling pressure, although special differentials are available. Dual pressures switches available and can be factory set to allow each snap action switch to operate at a different pressure setting.
These switches allow for simple electrical on/off control over pressures and vacuums. As pressure goes up, one contact opens as the other closes. This provides a perfect solution for monitoring, controlling, and notifying.
Rating: 1 HP @ 125 VAC; 2 HP @ 250 VAC. Also available to 25 AMPS.
Materials: Acetal body and mechanism; diaphragm available in various materials: nitrile, neoprene, vitron, EPDM and silicon rubber; stainless or zinc plated steel screws; stainless steel springs
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Printed circuit board mount pressure switches are miniature single pole and double pole switches used as pressure switches where moderate accuracy is sufficient. Pressure ranges: 6 IN.W.G. to 65 PSIG. Pressure setting marked on switch in inches water gauge. Actuation point is customer specified and set at the Presair factory. Some models allow field adjustment.
Rating: 1 AMP resistive @ 250 VAC. Ratings are dependent on actuation pressure and must be de-rated at lower pressures. UL recognized for 100,000 operations.
Material: Rynite/acetal body, silicon diaphragm, gold pins and contacts, stainless steel springs and screws.
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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.
These “slow make, slow break” switches can respond to rapid pulsing and 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.
Rating: 750 ma @ 250 VAC to 5 ma @ 3 VDC; 1 AMP @ 250 VAC to 5 ma @ 3 VDC. UL Recognized for 100,000 operations.
Material: Acetal body; EPDM diaphragm bonded to steel ring; other diaphragm materials are available; gold plated silver contacts; silver plated bronze springs; silver plated copper or brass terminals.
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