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SD505-Duct Addressable Duct Smoke Detector and Housing – HVAC Duct Mount Fire Sensor for Commercial Air Handling Systems

$1,295.00

Specifications

The SD505-Duct is a heavy-duty pre-populated duct detector assembly housing plus SD505-APS addressable photoelectric head for early HVAC smoke detection across wide airflow ranges.

  • Model: SD505-Duct Smoke Detector and Housing
  • Brand: Silent Knight (Honeywell Farenhyt family)
  • Type: Analog addressable duct detector assembly
  • Pre-installed Head: SD505-APS addressable photoelectric sensor
  • Power Requirements: 24 VDC, loop-powered
  • Alarm Current: 62 mA
  • Airflow Range: 300 – 4,000 ft/min (1.5 – 20.3 m/s)
  • Operating Temperature: 32°F to 120°F (0°C to 49°C)
  • Mounting: Pivoting housing for round or rectangular ducts
  • Certifications: UL Listed for duct applications
  • Testing: Built-in cover test/reset plus remote-test ready
  • Application: Commercial HVAC supply/return air handling

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Duct Smoke Detector
SD505-Duct Addressable Duct Smoke Detector and Housing – HVAC Duct Mount Fire Sensor for Commercial Air Handling Systems
$1,295.00

SD505-Duct Smoke Detector and Housing

The SD505-Duct Smoke Detector and Housing is a heavy-duty duct housing that arrives with the SD505-APS addressable photoelectric smoke detector pre-installed a factory-matched unit engineered to detect smoke and products of combustion inside HVAC air-handling systems. It’s designed for early smoke detection in supply and return ducts, delivering intelligent addressable communication so the fire alarm panel can pinpoint the exact location of activity. Built-in cover test/reset functionality and remote testing capability streamline inspection routines, while stable operation across airflow ranges from 300 to 4,000 ft/min makes it a dependable choice for a wide span of commercial and institutional HVAC layouts.

Features

  • SD505-APS addressable photoelectric head pre-installed from the factory
  • Heavy-duty housing built for sustained HVAC duty cycles
  • Early smoke detection for HVAC supply and return air handling
  • Intelligent addressable communication for precise location reporting
  • Built-in cover test/reset button for quick manual diagnostics
  • Remote testing capability for hard-to-reach duct locations
  • Stable operation across 300–4,000 ft/min airflow

Benefits

Ordering the SD505-Duct instead of a housing-plus-head-separate configuration saves procurement and install time — the assembly arrives pre-matched, factory-installed, and ready to mount. The SD505-APS head’s intelligent addressable reporting means dispatched technicians know exactly which duct run is in alarm, which shortens mean time to response in large buildings with many detection points. Wide airflow tolerance (300–4,000 ft/min) removes one of the classic install worries on older buildings with variable HVAC performance. Remote testing capability is a quiet but meaningful maintenance win: inspections happen faster, which keeps the facility compliant without disrupting tenants.

Why Choose QuickShipFire?

  • Factory-assembled SD505-Duct units stocked for faster job turnaround
  • Technical cross-checks against your panel firmware before shipment
  • Coordinated freight for large-format duct detector orders on tight schedules
  • Pairing recommendations with sampling tubes sized to your duct widths
  • Honest compatibility feedback we’ll tell you if an alternate assembly fits better
1. Is the SD505-APS head already installed in the SD505-Duct unit I receive?
Yes, the SD505-Duct ships as a complete assembly with the SD505-APS photoelectric head factory-installed in the housing.
2. What's the minimum airflow the SD505-Duct can detect reliably in?
Its rated airflow range starts at 300 ft/min, so it's best suited for HVAC systems where typical duct velocities stay in the 300–4,000 ft/min band.
3. Does this assembly include a relay for fan shutdown?
No, the standard SD505-Duct does not include an onboard relay; for built-in relay functionality, the SD505-DUCTR version is the correct choice.
4. Can the SD505-Duct be tested without disassembling the housing?
Yes. The built-in cover test/reset button and remote testing capability allow routine diagnostics without opening the assembly or interrupting airflow.
5. Is the pre-installed head compatible with older Silent Knight panels?
Compatibility depends on specific panel model and firmware. Quickshipfire's team can cross-check the SD505-APS head against your installed panel before you buy.
6. How does ambient temperature affect the SD505-Duct?
Operating temperature is rated 32°F–120°F; installations routinely outside that range should be evaluated for supplemental environmental protection.
7. How is this different from bolting a separate head into a basic housing?
The SD505-Duct arrives factory-matched and tested as a single SKU, reducing install-time guesswork and QA steps compared to component-level assembly in the field.
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