Silent Knight SD505-DUCT


Addressable Duct Detector

Availability: Estimated 6 Weeks

Condition: New
Brand: Silent Knight
Status: Obsolete
SKU: 34241
Manufacturer Part #: SD505-DUCT
Replacement: SD505-DUCTR


The SD505-DUCT addressable duct smoke detector is a heavy duty detector housing with the SD505-APS addressable photoelectric smoke detector pre-installed and is used for detecting smoke and products of combustion present in air moving through HVAC air handling systems.

Additional information

Weight 1.2 lbs
Production Status




  • Two wire connection to SLC
  • Detects and limits the spread of smoke
  • Rugged steel back box with clear plastic cover
  • Three standard tube lengths
  • Installation template included
  • UL listed


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Duct Smoke Detector; Model SD505-DUCT


Silent Knight – Data Sheet