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Titel: Measuring Hydrogen in Indoor Air with a Selective Metal Oxide Semiconductor Sensor
VerfasserIn: Schultealbert, Caroline
Amann, Johannes
Baur, Tobias
Schütze, Andreas
Sprache: Englisch
Titel: Atmosphere
Bandnummer: 12
Heft: 3
Verlag/Plattform: MDPI
Erscheinungsjahr: 2021
Freie Schlagwörter: hydrogen
indoor air
human presence
metal oxide semiconductor gas sensors
indoor air quality
DDC-Sachgruppe: 500 Naturwissenschaften
Dokumenttyp: Journalartikel / Zeitschriftenartikel
Abstract: Hydrogen is a ubiquitous but often neglected gas. In analytical measurements hydrogen—as a harmless gas—often is not considered so no studies on hydrogen in indoor air can be found. For metal oxide semiconductor (MOS) gas sensors that are increasingly pushed into the application as TVOC (total volatile organic compounds) sensors, hydrogen is a severe disturbance. On the other hand, hydrogen can be an intentional choice as indicator for human presence similar to carbon dioxide. We present a field-study on hydrogen in indoor air using selective MOS sensors accompanied by an analytical reference device for hydrogen with an accuracy of 10 ppb. Selectivity is achieved by siloxane treatment combined with temperature cycled operation and training with a complex lab calibration using randomized gas mixtures, yielding an uncertainty of 40–60 ppb. The feasibility is demonstrated by release tests with several gases inside a room and by comparison to the reference device. The results show that selective MOS sensors can function as cheap and available hydrogen detectors. Fluctuations in hydrogen concentration without human presence are measured over several days to gain insight in this highly relevant parameter for indoor air quality. The results indicate that the topic needs further attention and that the usage of hydrogen as indicator for human presence might be precluded by other sources and fluctuations.
DOI der Erstveröffentlichung: 10.3390/atmos12030366
Link zu diesem Datensatz: urn:nbn:de:bsz:291--ds-336664
hdl:20.500.11880/30982
http://dx.doi.org/10.22028/D291-33666
ISSN: 2073-4433
Datum des Eintrags: 30-Mär-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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