1. VESDA INTRODUCTION An aspirating smoke detector (ASD), consists of a central detection unit which draws air through a network of pipes to detect smoke. [1] The sampling chamber is based on a nephelometer that is capable of detecting the presence of smoke particles suspended in air by detecting the light scattered by them in the chamber. Aspirating smoke detectors are highly sensitive, and can detect smoke before it is even visible to the human eye. [1]nephelometer very early warning aspirating smoke detection solutions with continuous air sampling provide the earliest possible warning of an impending fire hazard. Even minute levels of smoke can be detected before a fire has time to escalate. VESDA detectors are available in a variety of models to accommodate a broad range of environments and applications. From small to very large, open spaces and from the cleanest to the dirtiest environments, VESDA provides reliable, high-sensitivity, very early warning smoke detection. large, open spacescleanest to the dirtiest environments

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3. 1.What is VESDA? 2.Where is it used? 3.What is the difference between VESDA and Smoke Detector? 4.Different Parts in VESDA and there working principal? 5.Features of VESDA? 6.Accessories used? 7.Advantages of VESDA? VESDA CONTENTS

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5. WHAT IS VESDA ?

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8. WHAT IS THE DIFFERENCE BETWEEN VESDA AND SMOKE DETECTOR (Conventional detector)

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14. DIFFERENT PARTS IN VESDA AND THERE WORKING PRINCIPAL VESDA

15. Working Principal of VESDA :

16. VESDA Working principal of VESDA

17. VESDA DETECTION CHAMBER

18. VESDA AIR - FILTER

19. VESDA FEATURE AND ADVANTAGES OF VESDA

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25. ACCESSORIES AND PIPE FITTINGS

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32. WHERE VESDA IS MORE USED

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