System Sensor DNR


Intelligent Non-Relay Photoelectric Low-Flow Duct Smoke Detector

22 in stock | Availability: Additional Units Available + Express Shipping Options

  • Factory New
Brand: System Sensor Part #: BC3C-6293 Categories: , , Manufacturer Part #: DNR Tags: ,


The Honeywell DNR intelligent non-relay photoelectric duct smoke detector and DNRW watertight non-relay photoelectric duct smoke detector feature a pivoting housing that fits both square and rectangular footprints capable of mounting to a round or rectangular duct.

The DNRW duct smoke detector, with its NEMA-4 rating, is listed as a watertight, UV resistant enclosure providing protection against falling dirt, rain, and windblown dust, splashing and hose directed water, allowing operators to use the detector in the most extreme environments.

These units sense smoke in the most challenging conditions, operating in airflow speeds of 100 to 4,000 feet per minute (0.5 – 20.32 m/s), temperatures of -4°F – 158°F (-20°C – 70°C), and a humidity range of 0 – 95 percent (non-condensing.)

An improved cover design isolates the sensor head, which allows for ease of maintenance. A cover tamper feature indicates a trouble signal for a removed or improperly installed sensor cover. The housing provides a 3/4-inch conduit knockout and ample space to facilitate easy wiring and mounting of a relay module.

The Honeywell DNR duct smoke detectors can be customized to meet local codes and specifications without additional wiring and are compatible with all previous models, including remote test accessories.


Weight 1.20 lbs
Dimensions 2.50 × 5.00 × 14.38 in



System Sensor



Unit of Measurement

EA (Each)

Production Status



Duct Detector Housing

Detection Method



Rotary Dials



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Product Notes

Requires photoelectric smoke detector (sold separately).


  • 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)

DNR AND DNRW Intelligent Photoelectric Duct Smoke Detectors


Honeywell - Data Sheet

DNR Duct Smoke Detector


System Sensor - Installation and Maintenance Instructions

Duct Smoke Detectors


System Sensor - Applications Guide

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