How does a sensor detect smoke?
Photoelectric smoke alarms Photoelectric alarms work using a photoelectric sensor and a light source. As smoke enters the chamber and crosses the path of the light beam, light is scattered by the smoke particles, aiming it toward the sensor, which in turn triggers the alarm.
Where would you expect to see VESDA installed?
Where can VESDA ® be used? Simply, VESDA ® can be installed anywhere that a conventional smoke detector system can, but with greater flexibility.
What is VESDA pipe?
The VESDA pipe range is based on pipework of a standard inside diameter (ID) of 3/4”. VESDA aspirating smoke detection is an early warning system that detects. fire in the incipient stages – before flames are visible – by detecting the. products of pre-combustion in the air around the area about to ignite.
Can smoke detectors detect being covered?
If you insist on covering your unit, keep in mind that it won’t be able to alert you in the event of a fire. Remember to remove the tape when you’re done. Once the room has cleared out, simply peel off and dispose of the tape.
How often do you replace VESDA filters?
every two years
VESDA Filter They provide two-stage filtration, first removing small particles and then ultrafine particles, to provide a clean air barrier for optics protection. It is recommended that VESDA filters are replaced at least every two years. VESDA filters are single use only and cannot be cleaned or refurbished.
Is VESDA a suppression system?
VESDA ® detection for Fire Suppression environments VESDA ® detection with Fire Suppression is a fantastic combination. With ever increasing environmental responsibilities, it is essential that a fire suppression system should deploy unnecessarily.
Who makes VESDA?
Xtralis
Xtralis is a global leader and pioneer in life safety. We invented VESDA very early warning aspirating smoke detection (ASD), the world’s leading ASD brand.
How does a smoke detector sense smoke?
There are several different types of sensors. A photo beam smoke detector uses a low power laser and a light sensor to detect an interference. The beam of light is shot from the laser to the detector at all times. When smoke crosses blocks path the detector no longer senses the light and sounds the alarm.
How does a fire alarm detect smoke?
A smoke alarm detects smoke and triggers the alarm. A smoke detector is one part of a fire alarm system that uses a separate fire alarm control unit. The detector senses the smoke and sends a signal to an off-site monitoring facility that contacts the fire department directly.
What is a VESDA system?
VESDA (an abbreviation of Very Early Smoke Detection Apparatus) is a laser based smoke detection system. The name VESDA has become a generic name for most air sampling applications. The name VESDA is a trade mark of Xtralis.
What is an air sampling smoke detection system?
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. 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.