Morley-IAS Duct detector housing complete with B501AP base for Addressable MI-PSE-S2 or MI-PSE-S2I detectors. (Detector not supplied). Requires DSTXX duct sampling tube and MI-PSE-S2 or MI-PSE-S2I detectors. For Duct accessories please see Duct range in the conventional section.

The Morley DNRE Air Duct Smoke Detector is an addressable duct-mounted photoelectric smoke detector designed for early detection of developing hazardous conditions in ventilation systems. It samples air passing through the duct via front and rear sampling tubes and uses a plug-in sensor head for straightforward maintenance. A cover tamper feature guards against removal or improper fitting of the sensor cover, and a remote alarm output supports auxiliary devices alongside remote test capability.

Operating from −20°C to 60°C with storage down to −30°C and humidity tolerance of 0% to 93% non-condensing, the DNRE provides local status indication via two LEDs controlled by the system panel, which can blink, latch on, or latch off based on coded signals. Addressing is set using code switches on the sensor head. The detector requires both electrical power and an operating ventilation system to sense smoke, and will not do so without these conditions present. Mounting options include side-by-side rectangular or stacked square configurations secured with the provided sheet metal screws. Compatible accessories include RA400Z/RA100Z remote LED annunciators and RTS-series test stations, while sampling tubes (DST1, DST3, DST5, DST10) are ordered separately according to duct width. Field wiring details are given in the installation manual.