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- Title
Quantitative Ethylene Measurements with MOx Chemiresistive Sensors at Different Relative Air Humidities.
- Authors
Krivec, Matic; Gunnigle, Gerald Mc; Abram, Anže; Maier, Dieter; Waldner, Roland; Gostner, Johanna M.; Überall, Florian; Leitner, Raimund
- 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).
- Subjects
ETHYLENE; DETECTORS; METALLIC oxides; TUNGSTEN oxides; HUMIDITY; ACCURACY
- Publication
Sensors (14248220), 2015, Vol 15, Issue 11, p28088
- ISSN
1424-8220
- Publication type
Article
- DOI
10.3390/s151128088