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DwyerAdjustable Set-Point Air Pressure Switches

Dwyer Adjustable Set-Point Air Pressure Switch

The DWYER 1638-10 is an adjustable set-point air pressure switch with a range of 3 in wc to 12 in wc. It features a single-pole double-throw (SPDT) switching action, a 1/8 in sample line connection, and a conduit box…

SKU 3G-OTH-69646

Also listed as: 163810 · 1638 10

Brand
Dwyer
Item
Adjustable Set-Point Air Pressure Switch
Part Number
1638-10
Category
Adjustable Set-Point Air Pressure Switches
Available to Order
Also known as:1638-10Dwyer
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

Dwyer
Manufacturer Part Number
1638-10
Type
3 in wc to 12 in wc, Conduit Box, SPDT
Switch Voltage
125V AC
Sample Line Connection Size
1/8 in

Technical Documents

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Dwyer Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The DWYER 1638-10 is an adjustable set-point air pressure switch with a range of 3 in wc to 12 in wc. It features a single-pole double-throw (SPDT) switching action, a 1/8 in sample line connection, and a conduit box enclosure. The switch operates at 125V AC.

Frequently Asked Questions

What is the Dwyer 1638-10 pressure switch used for?

The Dwyer 1638-10 adjustable set-point air pressure switch is used to monitor or control air pressure in HVAC, ventilation, and industrial process systems. It actuates an SPDT contact when pressure reaches the set point between 3 in wc and 12 in wc, enabling alarm or control functions.

What are the specifications of the Dwyer 1638-10 pressure switch?

The Dwyer 1638-10 is an adjustable set-point air pressure switch with a range of 3 in wc to 12 in wc. It features SPDT switching, a 1/8 in sample line connection, a conduit box enclosure, and operates at 125V AC. The manufacturer part number is 1638-10.

Where to buy the Dwyer 1638-10 pressure switch worldwide?

You can source the Dwyer 1638-10 pressure switch through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we supply genuine Dwyer components.

How to install the Dwyer 1638-10 pressure switch?

Mount the Dwyer 1638-10 in a clean, dry location. Connect the 1/8 in sample line to the pressure source. Wire the SPDT contacts per your control circuit (125V AC max). Adjust the set point by turning the adjustment screw to the desired pressure within the 3 in wc to 12 in wc range.

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
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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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