Merged optical methods. You'll find numerous proprietary optical smoke measurement devices such as the 'nephelometer' or the 'aethalometer' which use many various optical procedures, together with multiple wavelength of light, inside a single instrument and use an algorithm to offer a very good estimate of smoke. Smoke from oxygen-deprived https://broadfar.com/nuso-heated-tobacco-smarter-alternative-to-traditional-smoking/