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Titel: Field Study of Metal Oxide Semiconductor Gas Sensors in Temperature Cycled Operation for Selective VOC Monitoring in Indoor Air
VerfasserIn: Baur, Tobias
Amann, Johannes
Schultealbert, Caroline
Schütze, Andreas
Sprache: Englisch
Titel: Atmosphere
Bandnummer: 12
Heft: 5
Verlag/Plattform: MDPI
Erscheinungsjahr: 2021
Freie Schlagwörter: MOS
metal oxide semiconductor gas sensor
VOC
volatile organic compounds
IAQ
indoor air quality
randomized gas mixtures
selective
SGP30
quantification
DDC-Sachgruppe: 500 Naturwissenschaften
Dokumenttyp: Journalartikel / Zeitschriftenartikel
Abstract: More and more metal oxide semiconductor (MOS) gas sensors with digital interfaces are entering the market for indoor air quality (IAQ) monitoring. These sensors are intended to measure volatile organic compounds (VOCs) in indoor air, an important air quality factor. However, their standard operating mode often does not make full use of their true capabilities. More sophisticated operation modes, extensive calibration and advanced data evaluation can significantly improve VOC measurements and, furthermore, achieve selective measurements of single gases or at least types of VOCs. This study provides an overview of the potential and limits of MOS gas sensors for IAQ monitoring using temperature cycled operation (TCO), calibration with randomized exposure and data-based models trained with advanced machine learning. After lab calibration, a commercial digital gas sensor with four different gas-sensitive layers was tested in the field over several weeks. In addition to monitoring normal ambient air, release tests were performed with compounds that were included in the lab calibration, but also with additional VOCs. The tests were accompanied by different analytical systems (GC-MS with Tenax sampling, mobile GC-PID and GC-RCP). The results show quantitative agreement between analytical systems and the MOS gas sensor system. The study shows that MOS sensors are highly suitable for determining the overall VOC concentrations with high temporal resolution and, with some restrictions, also for selective measurements of individual components.
DOI der Erstveröffentlichung: 10.3390/atmos12050647
Link zu diesem Datensatz: urn:nbn:de:bsz:291--ds-340967
hdl:20.500.11880/31354
http://dx.doi.org/10.22028/D291-34096
ISSN: 2073-4433
Datum des Eintrags: 25-Mai-2021
Fakultät: NT - Naturwissenschaftlich- Technische Fakultät
Fachrichtung: NT - Systems Engineering
Professur: NT - Prof. Dr. Andreas Schütze
Sammlung:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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