Hochiki DH-99-AR

Digital Analog Duct Detector

  • Factory New
  • Material Obsolete
Brand: Hochiki FireAlarm.com Part #: 51203 Categories: , Manufacturer Part #: DH-99-AR


The DH-99 is designed and built to meet all local requirements, as well as the NFPA regulations regarding duct smoke detectors. The DH-99-AR is provided with output terminals for remote accessories such as a remote status indicators and reset key switches or push buttons. Air sampling is accomplished by two tubes which protrude into the duct. An exhaust tube of one standard length (7.5″) is supplied in the installation kit with the smoke duct unit. Once the duct width has been determined the air intake sampling tubes must be ordered. Sampling tubes are supplied in three standard lengths 2.5 ft., 5 ft. and 10 ft. and cut to size to fit the duct.


Weight 3 lbs
Dimensions 2.25 × 7.25 × 9.125 in


Production Status




Product Notes

Replacement: DH-100-P


  • Detects and limits the spread of smoke throughout building HVAC ducts
  • Compatible with building automation and fire alarm systems
  • Installs quickly and easily
  • No screens or filters to clean
  • Rugged gray steel back box with clear cover
  • Accessories – Remote LED alarm indication capability (DH-99-AR only)
  • Meets UL 268A Requirements


Digital Analog Duct Detector; DH-99
Hochiki – Data Sheet – 2020

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