Duct Detectors

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Conventional 2 Wire Duct Detector


The InnovairFlex 2-wire Photoelectric Duct Smoke Detector features a pivoting housing which fits both square and rectangular footprints, capable of mounting to a round or rectangular duct.
These units sense smoke in the most challenging conditions, operating in airflow speeds of 0.5 to 20 meters per second, temperatures of -20°C to 70°C and a relative humidity range of 0 to 95 percent, non-condensing.
An improved cover design isolates the sensor head from the LowFlow feature for simple maintenance. A Cover Tamper feature provides a fault signal if the sensor cover is removed or improperly installed. The InnovairFlex housing has a 20mm conduit knockout and ample space for wiring.
The InnovairFlex Duct Smoke Detector can be customized to meet local requirements and specifications without additional wiring. The product line utilises a new sampling tube range, but remains compatible with all previous Innovair models, including remote test accessories.


  • ActivFire: afp -2419
  • Utilises standard plug-in conventional photo-electronic smoke detector - included
  • Integrated Low-Flow technology
  • Air Velocity rating from 0.5 m/s to 20 m/sec.
  • Versatile mounting options: square or rectangular configuration
  • Broad ranges for operating temperature (-20 °C to 70 °C) and humidity (0% to 95% non-condensing)
  • Patented sampling tube installs from front or rear of the detector with no tools required
  • Cover Tamper signal
  • Large wiring space with 3 x 20mm conduit knockouts
  • Remote Test ability, with external power and RTS451KEY
  • Improved LED status
  • 24 Vdc
  • Backward compatible with existing Innovair products, including remote accessories

Ordering Information

Product Code



2 Wire Conventional Duct Smoke Detector & Housing (Excludes Sampling Tube)

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