Abstract: This paper evaluates the accuracy of the newly introduced ultra-portable olfactometer, Scentroid SM100 developed by IDES Canada Inc, with two techniques traditionally used for assessing ambient odours: Nasal Ranger instrument and a lung technique with the dynamic olfactometry laboratory analysis of collected samples. A similar study was presented at the recent NOSE 2012 odour conference , where the results indicated good correlation between Scentroid SM100 and other techniques used for assessing odours: a) collection of the samples at the sources and dispersion modeling analysis to predict off site odour concentrations and b) ambient sampling using lung technique and odour panel evaluation by dynamic olfactometry. However, the study was based on the data when the odour was in the range 90 ou to 3000 ou. At that time the low ranges of the Scentroid SM100 was not studied; therefore this paper is to present data based on an extensive study of the Scentroid SM100 when the odour concentration of ambient odour is in the range of 2 ou to 100 ou. This time the results are compared with Nasal Ranger instrument and lung technique used for collection of ambient samples and odour panel evaluation.
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