Silent Knight SD505-DUCT Addresable Duct Housing w/SD505-APS

  • Sale
  • $140.03
  • Regular price $233.38


• Two-wire connection to SLC

• LED alarm indication and communication on sensor head

• Detects and limits the spread of smoke

• Rugged steel backbox with clear plastic cover

• Large terminal connection screws

• 3 standard tube lengths

• Installs quickly and easily

• Meets UL 286A requirements

• Complies with NFPA 72 and 101



Dimensions: 91/8” H x 7.25” W x 2.25” D

Net weight: 3lbs

Color: Gray backbox with clear cover


Alarm Current: 0.55 mA (alarm and standby)

Air Velocity

300-4000 fpm


Ambient Temperature: 32º F to 120º F (0ºC to 49ºC)

Humidity: 10 to 85% RH, non-condensing