Olfactometer electronic

Figure 8.8 shows the evolution of the response of an electronic nose placed in a composting hall. Thanks to a suitable calibration model established with parallel olfactomet-ric measurements, the global response is translated into odour concentration unit (ouE/m ) and could be compared to a warning threshold concentration, e.g. 700 ous/ml... 

Figure 18.1.9. Principle of an olfactometer. 1 diluent air a) outer air, b) synthetic air (bottle) 2 acitvated charcoal filter air from 2d to rinse by-pass, 3 glass bulb pump with electronically controlled drive (a,b) 4 mix chamber (with installation a) 5 evaluator s mask 6 sample air (if necessary pre-mixed) 7 glass bulb pump with electronically controlled drive (a,b) 8 by-pass valve 9 mix chamber valve 10 crmtrol terminal, a) display (programme step), b) display, c) terminal keyboard 11 printer 1 - IV control line 12 additional pump (24 1 x min-1).

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