Smoke%20Detectors

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Smoke Detectors

• Greg Miller

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Three Basic Types

• Optical
• Ionization
• Air-Sampling

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Optical and Optical Beam

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

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Ionization
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Aspirating Smoke Detectors

• Even Sample Distribution
• Solid State Laser
• Auto Fire Response
• Extremely Accurate
• Multiple Response Levels

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Aspirating Smoke Detector
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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
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Application
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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