Description
The Silent Knight SD505-AIS is an addressable ionization smoke detector designed for IntelliKnight fire alarm systems. It provides rapid response to fast-flaming fires that produce minimal visible smoke, making it ideal for high-risk environments such as hospitals and industrial facilities. With a low-profile design and automatic contamination compensation, the SD505-AIS ensures reliable detection and simplified maintenance.
Technical Specifications
| Condition |
New/Never Used Surplus |
| Brand |
Silent Knight |
| Category |
Fire Safety |
| Part Number |
SD505-AIS |
| Subcategory |
Smoke Detector |
| Detector Type |
Addressable Ionization Smoke Detector |
| Radioactive Source |
Americium-241, 0.098 µCi |
| Operating Voltage |
24 VDC |
| Current Consumption |
0.55 mA standby / 0.55 mA alarm |
| Height |
2.25 in (with base) |
| Diameter |
Approx. 3.9 in |
| Operating Temperature |
32°F to 120°F (0°C to 49°C) |
| Humidity Range |
Up to 93% RH non-condensing |
| Air Velocity Range |
0–300 FPM |
| Mounting Options |
4” Square, 4” OCT, Single gang mud ring |
| Status Indicators |
LED blink (standby), steady (alarm) |
| Compatible Bases |
SD505-6AB and interchangeable with APS/AHS models |
| Certifications |
UL Listed, NFPA 72 Compliant, CSFM Approved, MEA Approved, FM Approved |
| Color |
Off-White |
| Weight |
~0.43 lbs |
Information About SD505-AIS
The SD505-AIS is part of the Silent Knight IntelliKnight detector series, engineered to deliver fast and accurate detection of flaming fires through ionization technology. Its dual-chamber design uses a radioactive source to measure current differences between a sampling and reference chamber, triggering alarms upon the presence of combustion gases or smoke. The detector features a status LED for communication and alarm indication, along with remote calibration viewing via IntelliKnight panels or compatible software. Built for easy installation, it uses the common SD505-6AB base, enabling interchange with photoelectric and heat detector models.
Key Features:
- Ionization Detection Technology: Provides early warning for flaming fires with minimal visible smoke.
- Dual-Chamber Design: Uses a sampling and reference chamber for precise monitoring of invisible gases.
- Automatic Contamination Compensation: Maintains consistent sensitivity in challenging environments.
- Low-Profile Housing: Measures only 2.25 inches with base for discreet installation.
- Status LED Indicators: Blinks during standby, steady during alarm for clear supervision.
- Remote Calibration Viewing: Allows detector calibration checks via panel or PC software.
- Vandal-Resistant Locking: Field-selectable security feature prevents tampering.
- UL, FM, CSFM, and MEA Approved: Complies with major fire safety standards.
The SD505-AIS delivers the reliability and speed required for environments where rapid fire growth is a concern.
