Description
The Silent Knight SD505-APS is an addressable, low-profile photoelectric smoke detector designed for IntelliKnight fire alarm systems. It provides reliable detection of smoldering fires while automatically compensating for sensor contamination. Compact, easy to install, and vandal-resistant, the SD505-APS ensures stable fire protection performance in demanding environments.
Technical Specifications
| Condition |
New/Never Used Surplus |
| Brand |
Silent Knight (Honeywell Farenhyt) |
| Category |
Fire Safety |
| Part Number |
SD505-APS |
| Subcategory |
Addressable Smoke Detectors |
| Series |
IntelliKnight SD505 Series |
| Detector Type |
Addressable photoelectric smoke detector |
| Operating Voltage |
17–41 VDC |
| Standby Current |
0.55 mA |
| Alarm Current |
0.55 mA |
| Sensitivity Range |
0.88% – 3.56% obscuration/ft |
| Operating Temperature |
32°F to 120°F (0°C to 49°C) |
| Relative Humidity |
Up to 85% non-condensing |
| Air Velocity Tolerance |
0–300 FPM |
| Height (with base) |
2 inches (low-profile) |
| Base Compatibility |
SD505-6AB common base |
| Construction |
Plastic housing, vandal-resistant locking |
| Maintenance |
Field cleanable chamber; drift compensation |
| Testing |
Calibration and sensitivity viewable via panel or remote Windows-based software |
| Listings & Approvals |
UL Listed; NFPA 72 compliant |
| Production Status |
Discontinued |
| Weight |
Approx. 0.3 lbs |
Information About SD505-APS
The SD505-APS is part of the Silent Knight IntelliKnight SD505 series of intelligent detectors, built for open-area smoke detection in commercial and institutional applications. Each detector has a unique digital address recognized by the FACP, simplifying identification and alarm response. Featuring a field-cleanable chamber, automatic drift compensation, and calibration test capability (local or remote via Windows-based software), the SD505-APS supports efficient maintenance and long service life. Its low-profile housing uses the SD505-6AB common base, ensuring compatibility across the series and flexibility in system design.
Key Features:
- Addressable Device: Each detector has a unique address recognized by the FACP.
- Photoelectric Sensing: Provides accurate detection of smoldering fires and dense smoke.
- Contamination Compensation: Automatically adjusts for environmental conditions to reduce false alarms.
- Built-In Test Feature: Supports local and remote calibration testing for simplified maintenance.
- Low-Profile Design: Measures just 2 inches high with base for unobtrusive installation.
- Base Compatibility: Uses SD505-6AB base, shared with other IntelliKnight detectors.
- Robust Construction: RF/transient protection and vandal-resistant locking enhance reliability.
The SD505-APS delivers the reliability and precision required for professional fire detection in IntelliKnight addressable systems.
