DND/DNRW Intelligent Smoke Detector

DNR/DNRW Intelligent non-relay photoelectric low-flow duct smoke detector

When System Sensor introduced the Innovair line of duct smoke detectors and accessories, it was revolutionary. Mechanical contractors and fire systems installers like you discovered its tremendous ease of use and reliability. Before long, the Innovair line rose to the top of the industry.


A cover tamper feature to provide a trouble signal for removed or improperly installed sensor cover

Available space within housing to accommodate mounting of relay module

Easily accessible code wheels on sensor head (sold separately)

NEMA Type 4 UL listed for non-hazardous indoor and outdoor applications (DNRW only)

UV Resistant, UL listed housing and cover material (DNRW only)

Physical Specifications

Size: (Rectangular Dimensions)

(Square Dimensions)

14.38 in (37 cm) Length; 5. in (12.7 cm) Width; 2.5 in (6.36 cm) Depth

7.75 in (19.7 cm) Length; 9 in (22.9 cm) Width; 2.5 in (6.35 cm) Depth

Weight: 1.6 lb (0.73 kg)

Environmental Rating: NEMA4 (DNRW only)

Operating Temperature Range: –4° to 158°F (–20°C to 70°C)

Storage Temperature Range: –22° to 158°F (–30°C to 70°C)

Operating Humidity Range: 0% to 95% relative humidity (non-condensing)

Air Duct Velocity: 100 to 4000 ft/min (0.5 to 20.32 m/s)

DNR/DNRW Duct Smoke Detector

NOTE: See detector head installation manual for electrical specifications


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