Quantitative Ethylene Measurements with MOx Chemiresistive Sensors at Different Relative Air Humidities

Sensors

Matic Krivec³  Gerald Mc Gunnigle³  Anže Abram²  Dieter Maier¹  Roland Waldner¹  Johanna M. Gostner⁴  Florian Überall⁴  Raimund Leitner³ 

[1] Philips Consumer Lifestyle Klagenfurt, Koningsbergerstrasse 11, A–9020 Klagenfurt, Austria; E-Mails:;Department for Nanostructured Materials, Jožef Stefan Institute, Jamova 39, SI–1000 Ljubljana, Slovenia; E-Mail:;CTR Carinthian Tech Research AG, Europastrasse 12, A–9524 Villach, Austria; E-Mails:;Division of Medical Biochemistry, Medical University of Innsbruck, Center for Chemistry and Biomedicine, Innrain 80, A–6020 Innsbruck, Austria; E-Mails:

关键词: ethylene;    relative humidity;    chemiresistive sensor;    linear regression model;   

DOI  :  10.3390/s151128088

来源: mdpi

【 摘 要 】

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).

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.