VESDA Air-sampling Smoke Detectors work by:
- Continually drawing air into a pipe network attached to a detector unit.
- Passing the air through a dual stage filter to remove dirt
- Sending the clean air to a laser detection chamber for smoke detection.
- Measuring the light scatter caused by any smoke
- Processing the detector signal and presenting the smoke level graphically
- Communicating the information to a fire alarm control panel, a software management system or a building management system.
Here is a fantastic Quick Time Video from Xtralis on how VESDA works.
Comment by sayed on 21 January 2010:
Pls sent the FM200 gas VESDA WLD Information for my ID.
Comment by Fire Alarm System on 27 January 2010:
Always remember to leave a sampling hole available at the end of the tube to ensure that the system can be tested to BS5839-1:2002