Smoke%20Detectors - PowerPoint PPT Presentation

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Smoke%20Detectors

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Title: Smoke%20Detectors


1
Smoke Detectors
  • Greg Miller

2
Three Basic Types
  • Optical
  • Ionization
  • Air-Sampling

3
Optical and Optical Beam
  • Optical
  • Source (Incandescent or LED)
  • Lens
  • Optical sensor (photodiode)
  • Optical Beam
  • Light Intensity
  • Large Open Room

4
Ionization
5
Aspirating Smoke Detectors
  • Even Sample Distribution
  • Solid State Laser
  • Auto Fire Response
  • Extremely Accurate
  • Multiple Response Levels

6
Aspirating Smoke Detector
7
Comparison
Type of Detector Obscuration Level
Ionization 2.6-5.0 obs/m
Photoelectric 6.5 - 13.0 obs/m
Beam 3 obs/m
Aspirating 0.005-20.5 obs/m
8
Application
9
References
  • http//extension.missouri.edu/explore/images/g0190
    7art03.jpg
  • http//simsburyfire.org/Pages/FMO/Images/ionizatio
    n.jpg
  • http//en.wikipedia.org/wiki/Optical_beam_smoke_de
    tector
  • http//en.wikipedia.org/wiki/Photodiode
  • http//en.wikipedia.org/wiki/FileSmokealarm.JPG
  • http//xtralis.com/misc/VESDA-Detector-Face.jpg
  • http//img.alibaba.com/photo/112472225/AIR_Intelli
    gence_Aspirated_Smoke_Detection.jpg
  • http//rodentstrobe.com/housefire.jpg
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