System Sensor®
4-Wire Photoelectric Duct Smoke Detectors



The System Sensor® InnovairFlex™ 4-WIRE PHOTOELECTRIC DUCT SMOKE DETECTOR features a pivoting housing that fits both square and rectangular footprints and mounts to round or rectangular ductwork. This unit senses smoke in the most challenging conditions—airflow speeds of 100–4000 feet per minute, temperatures of –4°F to 158°F, and humidity of 0%–95% (non-condensing). A plug-in sensor head offers false alarm immunity and simple installation, testing, and maintenance, while the cover design isolates the sensor head from the low-flow feature for simple maintenance.


PLEASE NOTE: Brooks Equipment only sells products to Fire/Life Safety Equipment and Service Companies. We do not offer products for direct purchase to private commercial or individual users.

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View Features & Specs



Features and Specifications:

  • Versatile mounting options: square or rectangular configuration
  • Plug-in photoelectric sensor offers superb false alarm immunity and the latest sensor technology
  • Low-flow technology allows air velocity from 100 ft/min to 4000 ft/min
  • Broad ranges for operating temperature (-4°F to 158°F) and humidity (0% to 95% non-condensing)
  • Operates on 24 VDC, 24 VAC, or 120 VAC

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