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System Sensor Europe, like the majority of manufacturers, is experiencing longer product lead times due to component shortages. As we actively work to improve this situation, your satisfaction remains our main priority. View our current estimated lead times.

Intelligent DNRE Duct Smoke Detector

The InnovairFlex™ DNRE intelligent non-relay photoelectric duct smoke detector features versatile mounting options in square or rectangular configuration with modular construction.

The DNRE Intelligent Duct smoke detector senses airflow speeds ranging from 0.5 -20meters per second with proven System Sensor precision. It improves false alarm immunity (with plug-in sensor head); detect smoke even in the harshest duct applications; broadens operating temperature (-20ºC to 70ºC) and humidity (0-95 percent non-condensing) ranges; simplifies installation, saving your time and money.

The improved cover design, with the integrated the low-flow feature, isolates the sensor head from the low-flow technology for simple maintenance.



  • Integrated low-flow technology
  • Air velocity: from 0.5 m/s to 20.3 m/sec
  • Superb false alarm immunity with the latest sensor technology
  • Broader ranges for operating temperature (-20ºC to 70ºC) and humidity (0% to 95% non-condensing)
  • Built-in short circuit protection from wiring errors
  • Clear cover for convenient visual inspection
  • Versatile mounting options in square or rectangular configuration
  • Patented sampling tube installs from front or back of the detector with no tools required
  • Easy and quick mounting to round or rectangular ducts of 0.3 m to 3.7 m wide
  • Fitted with base for Intelligent detectors S200 range
  • Housing to accommodate relay module
  • Cover tamper signal