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Dwyer Series 1900 Compact Low Differential Pressure Switches

Compact Low Differential Pressure Switches
Series 1900

Dwyer's most popular series 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 to 20˝ (1.8 to 508 mm) w.c. Set point adjustment is easy with range screw located inside conduit enclosure. Internal location helps prevent tampering. UL, CE, CSA listed, and FM approved.

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At Max. Set PointAt Min. Set PointCat #Operating Range Inches, w.c.Price
0.040.041910-000.07 to 0.15$44.00
0.100.101910-00.15 to 0.5541.50
0.160.151910-10.40 to 1.641.50
0.300.301910-51.40 to 5.541.50
0.400.401910-103.0 to 11.7541.50
0.500.401910-204.0 to 20.041.50
Service: Air and noncombustible, compatible gases.
Wetted Materials: Consult factory.
Temperature Limits: -30 to 180°F (-34 to 82.2°C).
Pressure Limits: 45˝ w.c. (11.2 kPa) continuous, 10 psig (68.95 kPa) surge.
Switch Type: Single-pole double-throw (SPDT).
Repeatability: ±3%.
Electrical Rating: 15 A @ 120- 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 Connections: 3 screw type, common, normally open and normally closed.
Process Connections: 1/8˝ female NPT.
Mounting Orientation: Diaphragm in vertical position.
Consult factory for other position orientations.
Set Point Adjustment: Screw type inside conduit enclosure.
Weight: 1lb, 4.5 oz (581 g).
Agency Approvals: CE , UL, CSA, and FM. Optional-EXPL Explosion-proof enclosure does not possess any agency approvals.

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