title: Quantitative Ethylene Measurements with MOx Chemiresistive Sensors at Different Relative Air Humidities.
abstract: The sensitivity of two commercial metal oxide (MOx) sensors to ethylene is tested at different relative humidities. One sensor (MiCS-5914) is based on tungsten oxide, the other (MQ-3) on tin oxide. Both sensors were found to be sensitive to ethylene concentrations down to 10 ppm. Both sensors have significant response times; however, the tungsten sensor is the faster one. Sensor models are developed that predict the concentration of ethylene given the sensor output and the relative humidity. The MQ-3 sensor model achieves an accuracy of ±9.2 ppm and the MiCS-5914 sensor model predicts concentration to ±7.0 ppm. Both sensors are more accurate for concentrations below 50 ppm, achieving ±6.7 ppm (MQ-3) and 5.7 ppm (MiCS-5914).
authors.affiliation: CTR Carinthian Tech Research AG, Europastrasse 12, A-9524 Villach, Austria. matic.krivec@ctr.at.
authors.forename: Matic
authors.initials: M
authors.lastname: Krivec
authors.affiliation: CTR Carinthian Tech Research AG, Europastrasse 12, A-9524 Villach, Austria. gerald.mcgunnigle@ctr.at.
authors.forename: Gerald
authors.initials: G
authors.lastname: Mc Gunnigle
authors.affiliation: Department for Nanostructured Materials, Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia. anze.abram@ijs.si.
authors.forename: Anže
authors.initials: A
authors.lastname: Abram
authors.affiliation: Philips Consumer Lifestyle Klagenfurt, Koningsbergerstrasse 11, A-9020 Klagenfurt, Austria. dieter.maier@philips.com.
authors.forename: Dieter
authors.initials: D
authors.lastname: Maier
authors.affiliation: Philips Consumer Lifestyle Klagenfurt, Koningsbergerstrasse 11, A-9020 Klagenfurt, Austria. roland.waldner@philips.com.
authors.forename: Roland
authors.initials: R
authors.lastname: Waldner
authors.affiliation: Division of Medical Biochemistry, Medical University of Innsbruck, Center for Chemistry and Biomedicine, Innrain 80, A-6020 Innsbruck, Austria. johanna.gostner@i-med.ac.at.
authors.forename: Johanna M
authors.initials: JM
authors.lastname: Gostner
authors.affiliation: Division of Medical Biochemistry, Medical University of Innsbruck, Center for Chemistry and Biomedicine, Innrain 80, A-6020 Innsbruck, Austria. florian.ueberall@i-med.ac.at.
authors.forename: Florian
authors.initials: F
authors.lastname: Überall
authors.affiliation: CTR Carinthian Tech Research AG, Europastrasse 12, A-9524 Villach, Austria. raimund.leitner@ctr.at.
authors.forename: Raimund
authors.initials: R
authors.lastname: Leitner
mesh_terms: D002623:Chemistry Techniques, Analytical / Q000295:instrumentation* / Q000379:methods; D004867:Equipment Design; D005030:Ethylenes / Q000032:analysis*; D005504:Food Analysis; D006813:Humidity; D016014:Linear Models; D010087:Oxides / Q000737:chemistry*; D017971:Tin Compounds / Q000737:chemistry*; D014414:Tungsten / Q000737:chemistry*
chemical_list: D005030:Ethylenes; D010087:Oxides; D017971:Tin Compounds; C511604:tungsten oxide; C045358:stannic oxide; D014414:Tungsten
keywords: chemiresistive sensor; ethylene; linear regression model; relative humidity