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An aspirating smoke detector (ASD) is a system used in active fire protection, consisting of a central detection unit which draws air through a network of pipes to detect smoke. [1] The sampling chamber is based on a nephelometer that detects the presence of smoke particles suspended in air by detecting the light scattered by them in the chamber.
A presentation by Siemens and the Canadian Fire Alarm Association reports that the ionization detector is the best at detecting incipient-stage fires with invisibly small particles, fast-flaming fires with smaller 0.01–0.4 micron particles, and dark or black smoke, while more modern photoelectric detectors are best at detecting slow ...
In the 2000s, the company announced its Fire-Smart series of alarm detectors which provide advanced detection of true fire & smoke conditions and eliminate false alarms. [5] The MPC series of intelligent addressable alarm panels utilized the electronic signature of each device to determine alarm, trouble, or maintenance alert status.
Siemens-Duewag U2 LRV – Edmonton Transit System and Calgary Transit – Alberta, Canada; Siemens SD-160 – Edmonton Transit System and Calgary Transit – Alberta, Canada; LHB/Siemens M1/M2/M3 Metro (Pair) – Prague Metro Czech Republic; Siemens-Adtranz LRV; MX3000 Metro car for Oslo (SGP Wien works) – Oslo T-bane, Norway; CAF S4000 Metro ...
An optical beam smoke detector is a device that uses a projected beam of light to detect smoke across large areas, [1] typically as an indicator of fire. [2] They are used to detect fires in buildings where standard point smoke detectors would either be uneconomical [ 3 ] or restricted for use by the height of the building.
On September 4, 1992, BRK recalled all hardwired smoke alarms under the series 1839I and 2839I due to testing programs determining that corrosion could form on the alarm horn's electrical contacts, causing the piezo to fail to make any noise. [6] In May 2006, First Alert combination smoke alarms were recalled due to draining batteries rapidly. [7]
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