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Dwyer Pressure Switch: Adj, Auto Reset, 3 in wc to 22 in wc, Conduit Box, SPDT - Adjustable Set-Point Air Pressure Switches
DwyerAdjustable Set-Point Air Pressure Switches

Dwyer Pressure Switch: Adj, Auto Reset, 3 in wc to 22 in wc, Conduit Box, SPDT

The Dwyer 1823-20 is an adjustable set-point air pressure switch with auto reset, covering a range of 3 in wc to 22 in wc. It features a SPDT switch rated for 120 to 480V AC and includes a conduit box with NPT…

SKU 3G-OTH-68291

Also listed as: 182320 · 1823 20

Brand
Dwyer
Item
Pressure Switch: Adj, Auto Reset, 3 in wc to 22 in wc, Conduit Box, SPDT
Category
Adjustable Set-Point Air Pressure Switches
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Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

Dwyer
Manufacturer Part Number
1823-20
Type
Auto Reset, 3 in wc to 22 in wc, Conduit Box, SPDT, NPT
AC
120 to 480V
Switch Voltage
120 to 480V AC

Technical Documents

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

Product Description

The Dwyer 1823-20 is an adjustable set-point air pressure switch with auto reset, covering a range of 3 in wc to 22 in wc. It features a SPDT switch rated for 120 to 480V AC and includes a conduit box with NPT connection. This product is designed for industrial applications requiring precise pressure monitoring.

Frequently Asked Questions

What is the Dwyer 1823-20 pressure switch used for?

The Dwyer 1823-20 adjustable set-point air pressure switch monitors and controls air pressure in industrial HVAC, ventilation, and process systems. It auto-resets and covers 3 in wc to 22 in wc, making it suitable for duct static pressure, filter monitoring, and fan status applications.

What are the specifications of the Dwyer 1823-20 pressure switch?

The Dwyer 1823-20 is an adjustable auto-reset pressure switch with a range of 3 in wc to 22 in wc. It has a SPDT switch rated for 120 to 480V AC, a conduit box, and an NPT connection. The switch voltage is 120 to 480V AC, and the manufacturer part number is 1823-20.

Where to buy the Dwyer 1823-20 pressure switch worldwide?

3G Electric supplies the Dwyer 1823-20 pressure switch worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your location. Contact us to source this adjustable set-point air pressure switch for your industrial application.

How to install the Dwyer 1823-20 pressure switch?

Install the Dwyer 1823-20 pressure switch by mounting it securely with the NPT connection to the pressure line. Wire the SPDT switch to 120 to 480V AC per local codes. Adjust the set-point between 3 in wc and 22 in wc using the adjustment screw. Always follow manufacturer guidelines for safe operation.

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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