1. 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 DetectorObscuration Level Ionization2.6-5.0 % obs/m Photoelectric6.5 - 13.0 % obs/m Beam3 % obs/m Aspirating0.005-20.5 % obs/m

8. Application

9. References  http://extension.missouri.edu/explore/images/g01907 art03.jpg http://extension.missouri.edu/explore/images/g01907 art03.jpg  http://simsburyfire.org/Pages/FMO/Images/ionization.jpg http://simsburyfire.org/Pages/FMO/Images/ionization.jpg  http://en.wikipedia.org/wiki/Optical_beam_smoke_de tector http://en.wikipedia.org/wiki/Optical_beam_smoke_de tector  http://en.wikipedia.org/wiki/Photodiode http://en.wikipedia.org/wiki/Photodiode  http://en.wikipedia.org/wiki/File:Smokealarm.JPG http://en.wikipedia.org/wiki/File:Smokealarm.JPG  http://xtralis.com/misc/VESDA-Detector-Face.jpg http://xtralis.com/misc/VESDA-Detector-Face.jpg  http://img.alibaba.com/photo/112472225/AIR_Intellig ence_Aspirated_Smoke_Detection.jpg http://img.alibaba.com/photo/112472225/AIR_Intellig ence_Aspirated_Smoke_Detection.jpg  http://rodentstrobe.com/housefire.jpg http://rodentstrobe.com/housefire.jpg