At DAS Fire we mostly employ smoke detection in our fire alarms and detection systems and as part of any fire suppression system to make sure that the fire is detected at the earliest opportunity whilst minimising false alarms.smoke detectors are available as standalone , conventional, addressable or digital devices.
An optical detector is a light sensor. When used as a smoke detector, it includes a light source (incandescent bulb or infrared LED-Light-Emitting Diode), a lens to collimate the light into a beam, and a photodiode or other photoelectric sensor at an angle to the beam as a light detector. In the absence of smoke, the light passes in front of the detector in a straight line. When smoke enters the optical chamber across the path of the light beam, some light is scattered by the smoke particles, directing it at the sensor and thus triggering the alarm.
Beam detectors primarily detects smoke but can also detect heat. Beam Smoke Detectors are used to provide “wide area” smoke detection. These are usually used in situations where it is impractical, inappropriate or not cost effective (installation, wiring and maintenance) to use traditional point-type detectors. It also enables coverage of a large area, at minimal cost. Optical Beam Smoke Detectors are also ideally suited for situations that might include high ceilings, dusty and dirty environments, or environments that experience temperature extremes.
VESDA, very early warning aspirating smoke detection solutions with continuous air sampling provide the earliest possible warning of an impending fire hazard. VESDA ASDs buy the critical time needed to investigate an alarm and initiate an appropriate response to prevent injury, property damage or business disruption. VESDA detectors have multi-level warnings and a wide range of sensitivity that does not degrade or change over time, so even minute levels of smoke can be detected before a fire has time to escalate. In addition, VESDA systems are manufactured using targeted Six Sigma techniques and ISO 9000 standards and have been certified by regulatory bodies worldwide.
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