Mixed optical methods. You'll find various proprietary optical smoke measurement units including the 'nephelometer' or even the 'aethalometer' which use several unique optical techniques, which include more than one wavelength of light, inside one instrument and apply an algorithm to offer a very good estimate of smoke. Hardly any https://emiliokzmbn.wannawiki.com/503753/fascination_about_smoke
Smoking - An Overview
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