The Silent Knight SK-DUCT is an addressable photoelectric air duct smoke detector. It detects smoke and products of combustion in air moving through HVAC ducts. This version includes the photoelectric sensor head and no relay module. On alarm, the panel can shut down fans and blowers per its programming.
The housing is a rugged steel back box with a clear cover. In addition, the pivoting design fits square or rectangular footprints. It mounts to round or rectangular ducts. The patented sampling tube installs from the front or back without tools. There is also space inside to add an SK-RELAY addressable relay module.
Silent Knight SK-DUCT Key Features
- Photoelectric smoke sensing for HVAC air duct applications
- Rotary address switches for fast installation
- Rugged steel back box with a clear plastic cover
- Tool-free sampling tube installation from the front or back
- Room in the housing for an optional SK-RELAY module
Specifications
- Operating voltage: 15–32 VDC
- Standby current: 300 µA max @ 24 VDC
- Air velocity rating: 100 to 4,000 feet per minute
- Operating temperature: -4°F to 158°F
- Housing size: 14.38″ L x 5″ W x 2.5″ D
Panel Compatibility
The SK-DUCT works with IntelliKnight 5700, 5808, 5820XL, and 5820XL-EVS panels at version 10 or higher. Those panels must run System Sensor protocol. It also works with the 5600 panel at version 2 or higher. Honeywell now lists the SK-DUCT-W as the current production model. However, Life Safety Consultants stocks the original SK-DUCT for replacement needs.
Order from Life Safety Consultants
Life Safety Consultants stocks genuine Silent Knight duct detectors. Furthermore, our team can help confirm compatibility before you buy.
For more information, contact the Life Safety Consultants team at (888) 557-0558, or email us at: sales@lifesafetycom.com
Additional information
| Weight | 2.5 lbs |
|---|---|
| Dimensions | 16 × 6 × 4 in |
| Condition | New |
| Manufacturers | Silent Knight |
| Part Type | Duct Detector |







