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DwyerAdjustable Set-Point Air Pressure Switches

Dwyer Pressure Switch: Adj, 0.05 in wc to 0.25 in wc, Conduit Box, SPDT, NPT

The Dwyer 1638-0 is an adjustable set-point air pressure switch with a SPDT contact configuration. It features a switch voltage of 250V AC and a pressure range of 0.05 in wc to 0.25 in wc, housed in a conduit box…

SKU 3G-OTH-69703

Brand
Dwyer
Item
Pressure Switch: Adj, 0.05 in wc to 0.25 in wc, Conduit Box, SPDT, NPT
Category
Adjustable Set-Point Air Pressure Switches
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Technical Specifications

Dwyer
Manufacturer Part Number
1638-0
Type
0.05 in wc to 0.25 in wc, Conduit Box, SPDT, NPT
NPT
1/8 in
Switch Voltage
250V AC
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Dwyer Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Dwyer 1638-0 is an adjustable set-point air pressure switch with a SPDT contact configuration. It features a switch voltage of 250V AC and a pressure range of 0.05 in wc to 0.25 in wc, housed in a conduit box with a 1/8 in NPT connection.

Used in

Common applications for Dwyer
Combustion air-filter monitoring — Magnehelic Series 2000 on burner air-intake filter banks
Clean-room and pharmaceutical pressurisation — Magnehelic / Capsuhelic differential-pressure gauges
HVAC fan-discharge static pressure — Mark II inclined-vertical manometers on AHU test points
Filter-blockage alarms — Photohelic Series 3000 combined gauge/switch on air-handling units
BMS-integrated pressure monitoring — Digihelic DH3 with 4–20 mA output for building management

Dwyer Products

3G Electric supplies Dwyer adjustable set-point air pressure switches. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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