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EDWARDS SIGNALING Duct Smoke Detector: 120V AC/20 to 31V DC/220 or 240V AC/24V - Smoke Detectors for Fire Alarm Systems
EDWARDS SIGNALINGSmoke Detectors for Fire Alarm Systems

EDWARDS SIGNALING Duct Smoke Detector: 120V AC/20 to 31V DC/220 or 240V AC/24V

The EDWARDS SIGNALING SD-4WJ is a rectangular, surface-mount duct smoke detector with a photoelectric sensor and clear body, rated for 120V AC/20 to 31V DC/220 or 240V AC/24V AC/24V DC Volt and 35 mA. It provides a…

SKU 3G-OTH-546834

Brand
EDWARDS SIGNALING
Item
Duct Smoke Detector: 120V AC/20 to 31V DC/220 or 240V AC/24V
Category
Smoke Detectors for Fire Alarm Systems
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Technical Specifications

EDWARDS SIGNALING
Manufacturer Part Number
SD-4WJ
Type
or 240V AC/24V AC/24V DC Volt
Shape
Rectangular
Detects
Smoke
Standards
FM
Alert Type
Light
Body Color
Clear
Sensor Type
Photoelectric
For Location
Indoor
Power Source
Hardwired
Current Rating
35 mA
Mounting Style
Surface
Voltage Rating
24V DC
Mounting Location
Duct
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EDWARDS SIGNALING Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The EDWARDS SIGNALING SD-4WJ is a rectangular, surface-mount duct smoke detector with a photoelectric sensor and clear body, rated for 120V AC/20 to 31V DC/220 or 240V AC/24V AC/24V DC Volt and 35 mA. It provides a light alert, is FM-listed for indoor use, and is hardwired with a 24V DC voltage rating.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is the EDWARDS SIGNALING SD-4WJ duct smoke detector used for?

The EDWARDS SIGNALING SD-4WJ is a photoelectric duct smoke detector designed for indoor HVAC systems. It mounts on duct surfaces to detect smoke in air-handling units, triggering a light alert to enable early fire response in commercial or industrial facilities.

What are the specifications of the EDWARDS SIGNALING SD-4WJ?

The SD-4WJ is a rectangular, clear-body duct smoke detector with a photoelectric sensor. It operates on 120V AC, 20–31V DC, 220/240V AC, or 24V AC/DC, with a current rating of 35 mA. It is FM-listed for indoor use and hardwired with a 24V DC voltage rating.

Where to buy the EDWARDS SIGNALING SD-4WJ worldwide?

3G Electric supplies the EDWARDS SIGNALING SD-4WJ duct smoke detector to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time.

How to install the EDWARDS SIGNALING SD-4WJ duct smoke detector?

Install the SD-4WJ on a duct surface using the included mounting bracket. Ensure power is off before wiring to the appropriate voltage (120V AC, 24V DC, etc.). Follow NFPA 72 guidelines for spacing and airflow direction. Test the light alert after installation per the manufacturer's manual.

Used in

Common applications for EDWARDS SIGNALING
Manufacturing assembly lines — EDWARDS SIGNALING 200 Class tower light modules for machine status indication (e.g., green for running, red for fault).
Process control panels — EDWARDS SIGNALING steady light modules (e.g., 270LEDSG240A) for visual confirmation of pump or valve states.
Material handling systems — EDWARDS SIGNALING tower light stacks with mixed steady/flashing modules for conveyor status and alarm alerts.
Washdown environments — EDWARDS SIGNALING 270BC wiring base with IP66 rating for food processing or pharmaceutical equipment signaling.
Remote monitoring stations — EDWARDS SIGNALING 24V AC/DC modules (e.g., 270LEDSW24AD) for low-voltage control systems in automated warehouses.
Safety and warning systems — EDWARDS SIGNALING amber and red modules for visual warnings on industrial machinery or access gates.

EDWARDS SIGNALING Products

3G Electric supplies EDWARDS SIGNALING smoke detectors for fire alarm systems. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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