Silent Knight Intelligent Photoelectric Duct Smoke Detector SK-DUCT-W, Smoke Detector Housing and SK-PHOTO-R-W Detector
Catch smoke inside the duct.
The Silent Knight SK-DUCT-W is an intelligent photoelectric duct smoke detector with a housing and SK-PHOTO-R-W detector, made for fire detection in commercial buildings and addressable fire alarm systems.

Smoke can travel through your ductwork.
Air handling ducts carry air through a building, so a detector that monitors the duct airflow helps fire alarm professionals watch for smoke in the air stream.
Built for easier duct installs
The housing is designed to simplify mounting, wiring, inspection and testing.
Low-flow photoelectric sensing
Photoelectric, integrated low-flow technology supports an air velocity rating from 100'/min - 4,000'/min (0.5 m/s - 20.32 m/s).

Maximum air velocity rating
Rated for air velocity from 100'/min - 4,000'/min (0.5 m/s - 20.32 m/s).
Tool-free sampling tube
The sampling tube installs from the front or back of the detector with no tools required.
Flexible mounting and wiring
Mount in a square or rectangular configuration, with increased wiring space from a newly added 3/4" conduit knockout.
Easy inspection and testing
A clear cover allows visual inspection, and remote testing capability and a cover tamper signal are included.
Everything you need to know.
| Brand | Silent Knight |
| Model | SK-DUCT-W |
| Product Type | Smoke Detector |
| Sensing Technology | Photoelectric |
| Connectivity Technology | Wired |
| Detectable Medium | Gas |
| Air Velocity Rating | 100'/min - 4,000'/min (0.5 m/s - 20.32 m/s) |
| Operating Temperature | -4°F - 158°F, -20°C - 70°C |
| Humidity | 0% - 93% non-condensing |
| Input Voltage | 32V DC |
| Certifications | UL: S6173, CSFM: 3242-0559:0518, FM approved |
| Shipping Weight | 2.3 lb |
Silent Knight Intelligent Photoelectric Duct Smoke Detector SK-DUCT-W, Smoke Detector H...
The Silent Knight SK-DUCT-W is a Intelligent Photoelectric Duct Smoke Detector (Smoke Detector Housing and SK-PHOTO-R-W Detector). It is made for fire alarm, security and facility professionals who need dependable smoke detector equipment.
Key Features
- Photoelectric, integrated low-flow technology
- Air velocity rating from 100'/min - 4,000'/min (0.5 m/s - 20.32 m/s)
- Versatile mounting options: square or rectangular configuration
- Broad ranges for operating temperature (-4°F - 158°F, -20°C - 70°C) and humidity (0% - 93% non-condensing)
- Sampling tube installs from front or back of the detector with no tools required
- Cover tamper signal
- Increased wiring space with a newly added 3/4" conduit knockout
- Easily accessible code wheels on sensor head (included with SK-DUCT-W)
- Clear cover for convenient visual inspection (SK-DUCT-W only)
- Remote testing capability
Specifications
- Brand: Silent Knight
- Model: SK-DUCT-W
- Product Model: SK-DUCT-W
- Product Type: Smoke Detector
- Connectivity Technology: Wired
- Detectable Medium: Gas
- Maximum Air Velocity: 20.32 m/s
- Sensing Technology: Photoelectric
- Status Indicators: Alarm, LED
- Input Voltage: 32V DC
- Power Source: DC
- Certifications & Standards: UL: S6173 CSFM: 3242-0559:0518 FM approved
- Shipping weight: 2.3 lb
Typical Uses
- Fire detection in commercial buildings
- Addressable fire alarm systems
Please confirm that the SK-DUCT-W matches your system, panel, mounting and finish requirements before ordering. Contact us with the model of your existing equipment if you need help checking compatibility.
Need help with compatibility?
Looking for a manufacturer part number, compatible replacement, or quantity order? Contact Raztechs for sourcing and quote support.

Silent Knight SK-DUCT-W, ready to order.
- Product Type: Smoke Detector
- Sensing Technology: Photoelectric
- Connectivity Technology: Wired
- Detectable Medium: Gas
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