The VESDA air sampling fire detection system detects the invisible by-products of materials as they degrade during the precombustion stages of an incipient fire. And, by actively and continuously sampling air, the system operates independently of air movements.
In operation air samples are continuously drawn from the monitored environment, typically through a sampling pipe network with the aid of a high efficiency aspirator. On the way to the fire detector the air samples pass through a filter assembly to screen out large airborne dust particles. Once inside the air sampling detector the samples are exposed to a high-intensity and broad-spectrum light source. The incident light scattered from smoke particles in the air sample passes through a series of optical components to a solid state light receiver. The light is converted to an electronic signal and passed to the control system.
At the control module the signal is processed and presented on an analog bar graph to visually indicate the level of smoke present in the monitored area. Depending upon smoke levels and the preprogrammed alarm levels, the appropriate output signals are generated.
The first of the three staged alarm levels (ALERT) may simply indicate that the system has detected something out of the ordinary that should be investigated. The second level (ACTION) indicates that a potential fire exists and that emergency procedures should begin. The third level (FIRE) signifies an actual fire condition.
T'he Laser Scanner Control Module provides a range of features previously unavailable in smoke detection systems. All of the features can be either manually programmed or automatically configured. All system functions are programmed via the simple 4-key keypad located on the lower front panel of the control module.
Air Sampling and Fire Suppression SystemsWhen combined with a special hazards fire suppression system such as FM-200, Inergen, FE-13, or Carbon Dioxide, an air sampling system can complement the extinguishing system by reducing the probability of an agent discharge. Early detection allows area personnel to investigate small fires and handle them without the need of a system discharge.
Assembling all the components of a high sensitivity air sampling fire detection system together into a workable system optomized for your facility is the work of trained fire protection engineers. At Reliable Fire Equipment our engineering group will design your VESADA Air Sampling system, prepare shop drawings, battery calculations, and provide you the hard data you need to rest assured in the confidence of a well designed high sensitivity early warning fire detection system.
For additional assistance on the design of your early warning air sampling system, complete our Survey Request Form and one of our professionals will contact you.
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