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Starting at $134.70CAD
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Dwyer

1900 Compact Low Differential Pressure Switches

In Stock *

Advanced design, precision construction, compact size, and repeatability; with set points from 0.07 in W.C. to 20 in W.C.

Starting at
$134.70CAD
Some configurations are in stock for immediate delivery!
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Our most popular Series 1900 combines advanced design and precision construction to make these switches able to perform many of the tasks of larger, costlier units. Designed for air conditioning service, they also serve many fluidics, refrigeration, oven and dryer applications. For air and non-combustible compatible gases, Series 1900 switches have set points from 0.07 in W.C. - 20 in W.C. (1.8 mm - 508 mm). Set point adjustment is easy with range screw located inside conduit enclosure. Internal location helps prevent tampering. UL, CE and CSA listed, and FM approved.

Caution: For use only with air or compatible gases.

• Compact size and repeatability, provides a high-value switch for many industrial and OEM applications
• Wide range of models from 0.07 in W.C. - 20 in W.C. can meet exacting OEM specifications for a low pressure switch
• Range screw protected inside enclosure provides simplifies making adjustments but prevents tampering




 

ServiceAir and non-combustible, compatible gases
Wetted MaterialsConsult factory
Temperature Limits-30°F - 180°F (-34°C - 82.2°C)
Pressure Limits45 in W.C. (11.2 kPa) continuous, 10 PSIG (68.95 kPa) surge
Switch TypeSingle-pole double-throw (SPDT)
Repeatability± 3%
Electrical Rating15 A @ 120 VAC - 480 VAC, 60 Hz. Resistive 1/8 HP @ 125 VAC, 1/4 HP @ 250 VAC, 60 Hz. Derate to 10 A for operation at high cycle rates
Electrical Connections3 screw type, common, normally open and normally closed
Process Connections1/8 in female NPT
Mounting OrientationDiaphragm in vertical position. Consult factory for other position orientations
Set Point AdjustmentScrew type inside conduit enclosure
Weight1 lb 4.5 oz (581 g).
Agency ApprovalsCE, CSA, FM, UL. Optional EXPL Explosion-proof enclosure does not possess any agency approvals

• Air conditioning refrigeration coil icing detection; defrost cycle intiation
• Clogged filter detection
• Variable air volume controller

  • Thumbnail of document Manual - 1900 Compact Low Differential Pressure Switches
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    Manual - 1900 Compact Low Differential Pressure Switches

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  • Thumbnail of document Data Sheet - 1900 Compact Low Differential Pressure Switches
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    Data Sheet - 1900 Compact Low Differential Pressure Switches

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