Aspirated Smoke Detector 2
Aspirated Smoke Detector 2 : History: In 1970 the Australian Commonwealth Scientific and Industrial Research Organisation (CSIRO) used a nephelometer to carry out research into forest fires. Subsequently, the Australian Postmaster-General's Department (later becoming Australia Post and Telstra) engaged the CSIRO to investigate technologies that could prevent service interruption due to fire. After selecting a sample site to carry out research, the CSIRO suggested that the nephelometer should be used as the benchmark for the APO fire tests. This was installed to monitor smoke levels within the return-air ducts of the mechanical ventilation system, utilising a chart-recorder output display. At the conclusion of several weeks of testing, it was discovered that there was not one commercially available fire detection technology suitable for preventing major damage to telephone equipment. One technology that did show great promise however was the nephelometer itself. In 1979, Xtralis, then IEI Pty Ltd. , launched the world's first-ever air sampling device called VESDA (Very Early Smoke Detection Apparatus). The company completely redesigned the detector in 1982 to provide the necessary reliability, features, size and reduced cost for export markets. There are more than 1. 5 million fires annually in the U. S. alone, according to the Society for Fire Protection Engineers. Fires result in an estimated $10 billion in property loss each year, the organization reports. ASD systems have gained popularity due to their ability to sense smoke long before a catastrophic incident
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