SD505-PHOTO | Silent Knight Addressable Photoelectric Smoke Detector for IntelliKnight Systems

Silent Knight · Fire & Life Safety

Description  The Silent Knight SD505-PHOTO is an addressable photoelectric smoke detector designed for IntelliKnight fire alarm systems. It automatically compensates for environmental contamination and provides reliable smoke detection for smoldering fires involving soft furnishings, plastics, or foams. With its low-profile design and compatibility with multiple bases, the SD505-PHOTO ensures flexible and efficient installation in fire protection applications.     Technical Specifications  Condition New/Never Used Surplus Brand Silent Knight Category Fire Safety Part Number SD505-PHOTO Subcategory Smoke Detector Detector Type Addressable Photoelectric Smoke Detector Operating Voltage 24–41 VDC Current Consumption 0.55 mA standby / 0.55 mA alarm Height 2 in (50.8 mm) Diameter 3.9 in (99.8 mm) Operating Temperature 32°F to 120°F (0°C to 49°C) Humidity Range Up to 85% RH non-condensing Air Velocity Range 0–300 FPM Mounting Options 4” Square, 4” OCT, Single gang mud ring Status Indicators Blinking LED (standby), Steady LED (alarm) Compatible Bases SD505-6AB, SD505-6IB, SD505-6RB, SD505-6SB Certifications UL Listed, FM Approved, CSFM Approved, MEA Approved Color Off-White Weight 0.43 lbs     Information About SD505-PHOTO The SD505-PHOTO is part of Silent Knight’s IntelliKnight series of analog/addressable detectors, offering dependable detection performance for commercial and institutional fire safety systems. It uses a photoelectric sensing chamber with an LED light source and silicon photodiode to identify large visible smoke particles from smoldering fires. The unit supports remote testing and automatic sensor calibration, reducing maintenance requirements. Compatible with the SD505-6AB and other Silent Knight bases, this detector integrates seamlessly into existing IntelliKnight panels, providing stable operation and vandal-resistant locking for secure use. Key Features: Addressable Photoelectric Detection: Detects large smoke particles from smoldering fires with high sensitivity. Automatic Contamination Compensation: Adjusts calibration over time to maintain reliable performance. Low-Profile Housing: Measures only 2 inches in height for discreet ceiling mounting. Remote Testing Capability: Supports calibration and functional testing through the control panel or PC software. Status LED Indicator: Provides visual supervision with blinking standby and steady alarm states. Vandal-Resistant Locking: Field-selectable security feature to prevent tampering. UL, FM, CSFM, and MEA Approved: Meets key fire safety standards for wide regulatory compliance. Interchangeable Base Compatibility: Works with SD505-6AB, SD505-6IB, SD505-6RB, and SD505-6SB bases. The SD505-PHOTO delivers the reliability and precision required for commercial and institutional fire detection systems.

Brand: Silent Knight · Category: Fire & Life Safety

Key features

• Addressable Photoelectric Detection: Detects large smoke particles from smoldering fires with high sensitivity.
• Automatic Contamination Compensation: Adjusts calibration over time to maintain reliable performance.
• Low-Profile Housing: Measures only 2 inches in height for discreet ceiling mounting.
• Remote Testing Capability: Supports calibration and functional testing through the control panel or PC software.
• Status LED Indicator: Provides visual supervision with blinking standby and steady alarm states.
• Vandal-Resistant Locking: Field-selectable security feature to prevent tampering.
• UL, FM, CSFM, and MEA Approved: Meets key fire safety standards for wide regulatory compliance.
• Interchangeable Base Compatibility: Works with SD505-6AB, SD505-6IB, SD505-6RB, and SD505-6SB bases.

Specifications

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