The use of multi-sensor array systems has become commonplace in indoor air quality or individual exposure applications. Nevertheless, there is a lack of reliable data, as qualification protocols are sparsely applied by end-users to multi-sensor commercial systems prior to field or lab implementation. This is especially the case with regard to VOC monitoring, although they are ubiquitous species of indoor environment. The aim of the present work is to propose an all-encompassing qualification protocol, suitable for a wide range of multi-sensor systems, able to assess the metrological performance regarding indoor VOCs. Furthermore, it provides data on metrological performance for 45 replicas of 5 types of sensors, 4 metal oxides and 1 electrochemical, embedded in a single system, under controlled conditions. Multi-sensor systems were exposed to 6 single VOCs, with their mixture representative of indoor pollution (formaldehyde, acetaldehyde, acetone, ethanol, limonene) in a 1:1 scale experimental room. Metrological performances were retrieved from the correlation curves established by comparison with the responses of a reference analyzer. The results show that the electrochemical sensor, supposedly dedicated to total VOCs, is acetone-blind and underestimates the effective quantity of TVOCs by a factor of 3. Metal oxide sensors, chosen for their reliability in establishing pollution source fingerprints, indicate effectively differentiated sensitivities by type of VOC, but without homogeneity by chemical family. A pre-processing of the data is required to overcome their non-linear responses depending on the concentration range. These results provide crucial insights for the interpretation of field campaign data retrieved from multi-sensor arrays.

العنوان

IEEE Sensors Journal

الناشر

IEEE

بلد الناشر

الولايات المتحدة الأمريكية

Indexing

Scopus

معامل التأثير

10,6

نوع المنشور

Both (Printed and Online)

المجلد

--

السنة

2024

الصفحات

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