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Duct Smoke Detectors | SDD-2000-N Ionisation Duct Smoke Detector

The SDD-2000 Series Smoke Duct Detector is the latest innovation for early detection of smoke and products of combustion present in air moving through HVAC ducts in Commercial, Industrial, and Residential applications. The unit is designed to prevent the recirculation or spread of smoke by air handling systems, fans, and blowers. Complete systems may be shut down in the event of smoke detection.

The SDD-2000 is designed and built to meet all local code requirements, as well as the NFPA and ICC standards regarding HVAC supply and return duct smoke detectors. The products are available both as ionisation and photovoltaic versions.

The SDD-2000 range has been designed easy to assemble and service e.g. the cover and the detector head can be removed by hand without need for the screwdriver. How many times have you been in the ceiling space wishing not to loose screws or screwdriver! Furthermore, the ionazation detector can be used in the photovoltaic enclosure and vice versa.

Photovoltaic vs Ionization Detection

Q: So where to use Photovoltaic detection and where Ionization detectors?

A: Ionization detection is based on smell rather than light in photovoltaic sensors. Ionization Detection normally work more reliably than photovoltaic minimising the false alarms. Ionization is typically used in offices, schools, public buildings etc. Photovoltaic detectors are normally used in buildings where the duct inherently contains various gases e.g. in hospitals.


  • Ionization and Photoelectric versions available
  • Low-Flow Technology: Both Ionization and Photoelectric models listed for velocities between 0.5-20m/s
  • Both models listed for high-temperature applications
  • Universal Operating voltages: 230VAC, 115VAC, 24VAC, 24VDC
  • Interconnect up to 30 units for common functions
  • Patent pending "No-Tools Required" front or rear loading and removing sampling/exhaust tubes
  • Patent pending "Test Port Valve" allows for aerosol smoke testing without cover removal
  • Clear cover fitted with four captive "No-Tools Required" thumbscrews
  • Instantaneous cover removal trouble indication
  • Staggered terminal blocks for easier wiring
  • Flashing LED on detector head indicates normal operation
  • Magnet test capability (magnet included)
  • More wiring space than competitive models
  • Footprint allows easy retrofit in many applications without additional drilling
  • Over 15 remote accessories available
  • Duct wall seals on back of enclosure are pre-installed
  • Reset switch is also an alarm test switch - competitive models require a magnet or cover removal to test at unit
  • Unit includes green pilot and red alarm visual indicators
  • External mounting tabs do not require cover removal to install
  • Colored cover gasket indicates proper cover seal
  • UL, CUL, CSFM, and MEA Listed
  • Compact, lightweight size means easy handling, lower shipping costs
  • Two sets of 10A form "C" alarm contacts
  • One set of 2A form "A" alarm contacts
  • One set of 10A form "C" trouble contacts
  • Large terminal connection screws
  • Standard interchangeable "plug-in" photoelectric or ionization heads
  • Advanced detector head design yields internal dust filtering
  • No additional screens or filters to clean
  • Compatible with building automation and fire alarm systems
  • Complete wiring details permanently attached to unit