DNR-AUS Intelligent Photoelectric Duct Smoke Detector – Addressable HVAC Duct Mount Fire Sensor for Commercial Buildings
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DNR-AUS Intelligent Photoelectric Duct Smoke Detector – Addressable HVAC Duct Mount Fire Sensor for Commercial Buildings

$225.00

Specifications

The DNR-AUS is a UL/FM-listed intelligent duct smoke detector using low-flow photoelectric sensing, a pivoting housing, and tool-free sampling tubes for accurate HVAC airflow protection up to 4,000 ft/min.

  • Model: DNR-AUS InnovairFlex Duct Detector
  • Brand: System Sensor
  • Sensing Type: Intelligent photoelectric with low-flow technology
  • Airflow Range: 100 – 4,000 ft/min (0.5 – 20.32 m/s)
  • Housing: Pivoting, fits round or rectangular ducts
  • Sampling Tubes: Patented plug-in, tool-free
  • Power: Communication-line powered
  • Conduit Knockout: ¾ inch
  • Test/Reset: Front-cover button; remote-test accessory compatible
  • Tamper: Cover tamper trouble signal
  • Relay Option: Addressable relay module (sold separately) for Form C
  • Certifications: UL Listed, FM Approved, CSFM Certified

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DNR-AUS Intelligent Photoelectric Duct Smoke Detector – Addressable HVAC Duct Mount Fire Sensor for Commercial Buildings
DNR-AUS Intelligent Photoelectric Duct Smoke Detector – Addressable HVAC Duct Mount Fire Sensor for Commercial Buildings
$225.00

DNR-AUS Intelligent Photoelectric Duct Detector

The DNR-AUS Intelligent Photoelectric Duct Detector is a System Sensor InnovairFlex-series device engineered to deliver dependable smoke detection inside HVAC duct systems. Built around advanced low-flow photoelectric technology and a pivoting housing that fits both round and rectangular ducts, it performs accurately across airflow speeds from 100 to 4,000 ft/min (0.5–20.32 m/s). The front-cover test/reset button, patented tool-free plug-in sampling tubes, and spacious interior with a ¾-inch conduit knockout make it contractor-friendly to install, service, and upgrade. UL Listed, FM Approved, and CSFM Certified, the DNR-AUS is a benchmark choice for commercial and industrial duct applications.

Features

  • Low-flow photoelectric smoke detection for accurate HVAC monitoring
  • Pivoting housing fits round or rectangular ducts in square/rectangular footprints
  • Wide operating airflow range: 100 to 4,000 ft/min
  • Front-cover test/reset button for in-field service convenience
  • Tool-free patented plug-in sampling tubes (front or back install)
  • Cover tamper detection issues trouble signal on cover removal
  • Communication-line powered, no extra power wiring required

Benefits

The DNR-AUS is purpose-built to eliminate the chronic pain points of duct smoke detection namely false trips from low airflow, awkward installs on tight mechanical rooms, and hard-to-reach test/reset workflows. Because the sensing technology is optimized down to 100 ft/min, it reliably detects smoke in variable-air-volume systems that would challenge older detectors. The tool-free sampling tubes save field time on long duct runs, and the pivoting housing means installers don’t need to pre-orient the housing before mounting. Facility teams benefit from the cover tamper feature, which flags accidental service lapses automatically. For engineers specifying large rooftop units, VAV systems, and return air plenums, the DNR-AUS delivers certified performance and simpler lifecycle maintenance.

Why Choose QuickShipFire?

  • Ready sourcing of InnovairFlex DNR-AUS units for HVAC-heavy commercial projects
  • Pairing guidance for matching sampling tube lengths to duct widths
  • Optional addressable relay module pre-quoted alongside the detector for Form C needs
  • Same-day dispatch support for mechanical contractors with tight HVAC commissioning windows
  • Experienced help with converting older relay-duct detectors to modern InnovairFlex units
Is the DNR-AUS suitable for VAV systems with low airflow conditions?
Yes, its low-flow photoelectric technology is engineered to operate down to 100 ft/min, making it a strong fit for VAV systems and diversified airflow patterns.
Do I need a separate power supply for the DNR-AUS?
No, The detector is communication-line powered by the host fire alarm panel, so no separate 24 VDC feed is required for standard detection.
How does the cover tamper feature help facility teams?
If the cover is removed or misaligned during service, the detector automatically sends a trouble signal to the panel preventing a unit from being accidentally left out of service.
Can the sampling tubes be installed without special tools?
Yes, the patented plug-in sampling tubes can be inserted tool-free from either the front or back of the housing, which saves time on awkward duct orientations.
Does the DNR-AUS support remote testing?
Yes, When paired with compatible accessories, remote test/reset capability simplifies routine inspections on high-mounted or ceiling-hidden ducts.
Can the DNR-AUS control auxiliary HVAC equipment like fans?
Yes, with the addition of a separately sold addressable relay module, the DNR-AUS can trigger Form C auxiliary functions such as fan shutdown or damper control.
Which certifications does the DNR-AUS hold?
It is UL Listed, FM Approved, and CSFM Certified a certification stack commonly required by specifying engineers for commercial and institutional projects.
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