期刊
SENSORS
卷 15, 期 11, 页码 28088-28098出版社
MDPI
DOI: 10.3390/s151128088
关键词
ethylene; relative humidity; chemiresistive sensor; linear regression model
资金
- Austrian Research Promotion Agency (FFG) [5742797]
- R&D Program COMET-Competence Centers for Excellent Technologies by the Federal Ministry of Transport, Innovation and Technology (BMVIT)
- R&D Program COMET-Competence Centers for Excellent Technologies by the Federal Ministry of Economics and Labour (BMWA)
- Austrian Science Fund (FWF) [T703]
- Austrian Science Fund (FWF) [T703] Funding Source: Austrian Science Fund (FWF)
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).
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