Original sentence: REDIRECT Smoke detector
Edited sentence: A VESDA detector may be used to trigger automatic fire responses, such as a gaseous fire suppression system, in high value, or mission critical areas such as archives or computer server rooms.Fire thresholds may be used to notify local or municipal emergency responders and ultimately to discharge fire suppression systems.Generally, aspirating smoke detectors, which are 'active' in nature vs.Most of the detectors in the VESDA range are aspirating smoke detectors.Small holes are drilled into each pipe to form a matrix of holes (sampling points), providing an even distribution across the pipe network.The air sample is drawn past a sensitive optical device (in the case of most VESDA detectors a solid state laser) tuned to detect the extremely small particles of combustion.This allows the earliest possible notification of a developing fire allowing intervention before a fire develops beyond the smouldering stage - allowing increased time for evacuation, or the implementation of Emergency Response or Business Continuity Plans.Thresholds may be set at levels across a very wide range of smoke levels.VESDA and similar smoke detection systems (HSSD's or High Sensitivity Smoke Detectors) provide multiple levels of alarm threshold such as: Alert, Action, Fire 1 and Fire 2.VESDA is a brand of air-sampling smoke detector which is capable of detecting the microscopic particles of smoke.conventional detectors which are 'passive' in nature,work by drawing air in through a network of small-bore pipes laid out above or below a ceiling in parallel runs covering a protected area