Silent Knight SK-DUCT-W Intelligent Photoelectric Duct Smoke Detector, Smoke Detector Housing and SK-PHOTO-R-W Detector

The SK-DUCT-W Intelligent Addressable Photoelectric Duct Smoke Detector is designed to detect smoke and combustion particles in air moving through HVAC ductwork. Featuring advanced photoelectric sensing technology, integrated low-flow detection, and a wide operating airflow range, this detector provides reliable smoke monitoring for compatible commercial and institutional fire alarm systems.

Designed for HVAC applications, the SK-DUCT-W operates in air velocities ranging from 100 to 4,000 feet per minute (0.5–20.32 m/s). Its photoelectric sensing technology monitors sampled duct air for smoke particles, helping compatible fire alarm control systems identify potentially hazardous conditions within air-handling equipment.

The detector supports operating temperatures from -4°F to 158°F (-20°C to 70°C) and relative humidity levels from 0% to 93%, non-condensing. These operating specifications provide flexibility across a variety of approved HVAC installations.

The SK-DUCT-W features a versatile housing that supports square or rectangular mounting configurations. Its sampling tube can be installed from the front or rear of the housing without tools, helping simplify installation and maintenance.

A clear housing cover allows convenient visual inspection of the internal detector, while the cover tamper signal supports monitoring of unauthorized or improper cover removal.

The housing includes an additional 3/4-inch conduit knockout and expanded wiring space to simplify electrical connections. Accessible rotary address wheels on the detector head support efficient configuration within compatible addressable fire alarm systems.

Remote testing capability provides convenient maintenance access, allowing authorized personnel to test supported detector functions through compatible system equipment.

The SK-DUCT-W assembly includes the duct detector housing and an SK-PHOTO-R-W photoelectric detector, providing an integrated solution for intelligent HVAC duct smoke detection.

10 Key Features

1. Intelligent Photoelectric Smoke Detection: Uses photoelectric technology to detect smoke particles in air moving through HVAC ducts.

2. Wide Airflow Operating Range: Supports duct air velocities from 100 to 4,000 feet per minute.

3. Integrated Low-Flow Technology: Designed to maintain smoke detection performance across supported low-airflow conditions.

4. Broad Operating Temperature Range: Supports environmental temperatures from -4°F to 158°F (-20°C to 70°C).

5. High Humidity Tolerance: Operates within a specified 0–93% relative humidity range, non-condensing.

6. Flexible Mounting Configuration: Supports square or rectangular housing arrangements for compatible duct installations.

7. Tool-Free Sampling Tube Installation: Allows sampling tube insertion from the front or rear of the housing.

8. Clear Inspection Cover: Provides convenient visual access to the detector assembly during routine inspection.

9. Cover Tamper Monitoring: Supports reporting of the detector housing cover tamper condition.

10. Remote Testing Capability: Supports remote detector testing through compatible fire alarm system equipment.