SMOKE DETECTORS

Greg Miller

Three Basic Types

Optical

Ionization

Air-Sampling

Optical and Optical Beam

Optical Source (Incandescent or LED) Lens Optical sensor (photodiode)

Optical Beam Light Intensity Large Open Room

Ionization

Aspirating Smoke Detectors

Even Sample Distribution

Solid State Laser

Auto Fire Response

Extremely Accurate

Multiple Response Levels

Aspirating Smoke Detector

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

Application

References http://extension.missouri.edu/explore/images/g019

07art03.jpg http://simsburyfire.org/Pages/FMO/Images/ionizati

on.jpg

http://en.wikipedia.org/wiki/Optical_beam_smoke_detector

http://en.wikipedia.org/wiki/Photodiode http://en.wikipedia.org/wiki/File:Smokealarm.JPG http://xtralis.com/misc/VESDA-Detector-Face.jpg http://

img.alibaba.com/photo/112472225/AIR_Intelligence_Aspirated_Smoke_Detection.jpg

http://rodentstrobe.com/housefire.jpg