System Sensor DNRW


Watertight Intelligent Non-Relay Photoelectric Low-Flow Duct Smoke Detector

Availability: Estimated 2 - 4 Weeks

  • Factory New
Brand: System Sensor Part #: K01A-4673 Category: Manufacturer Part #: DNRW


The InnovairFlex Series DNR and DNRW are intelligent (addressable) non-relay photoelectric duct smoke detectors.

Like all InnovairFlex detectors, the DNR and DNRW both feature an adjustable housing design that fits square and rectangular installation footprints, mounts to both round and rectangular ductwork, and utilizes tool-free, plug-in sampling tubes for increased application flexibility and installation ease.

These units sense smoke in challenging conditions, operating in airflow speeds of 100 to 4,000 feet per minute, temperatures of −4°F to 158°F, and a humidity range of 0 to 95 percent (non-condensing). For even more extreme environments like rooftops, the DNRW’s NEMA 4-rated watertight and UV-resistant housing protects against windblown dirt and dust, rain, and hose directed water, enabling it to be installed without a costly enclosure, saving time and money.

The InnovairFlex housing cover isolates the sensor head from the low-flow feature for simple maintenance, and a cover tamper feature initiates a trouble signal for a removed or improperly installed sensor cover. The housing also provides a 3⁄4-inch conduit knockout and ample space to facilitate easy wiring and mounting of a relay module to meet specific application requirements. These detectors can be customized to meet local codes and specifications without additional wiring.

The InnovairFlex line is compatible with all previous Innovair models, including remote test accessories, for easy retrofits.


Weight 1.60 lbs
Dimensions 2.50 × 5.00 × 14.38 in



System Sensor




Duct Detector Housing

Detection Method



Rotary Dials

Material Qualities

UV Resistant, Weatherproof


Production Status



  • Photoelectric, integrated low-flow technology (detector head sold separately)
  • Air velocity rating from 100 ft/min to 4,000 ft/min
  • Adjusts to square and rectangular mounting configurations
  • Broad ranges for operating temperature (−4°F to 158°F) and humidity (0% to 95% non-condensing)
  • Patented tool-free, plug-in sampling tubes
  • New cover tamper signal
  • Increased wiring space with a new 3⁄4-inch conduit knockout
  • Housing has space for mounting a relay module
  • Easily accessible code wheels on sensor head (sold separately)
  • Clear cover for convenient visual inspection
  • UL 268A listed
  • Remote testing capability
  • Requires com line power only
  • NEMA Type 4 UL listed for non-hazardous indoor and outdoor applications (DNRW only)
  • UV-resistant, UL-listed housing and cover material (DNRW only)

Intelligent Non-Relay Photoelectric Duct Smoke Detector


System Sensor - Data Sheet

Duct Smoke Detector; DNRW


System Sensor - Installation and Maintenance Instructions

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