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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).

SUBMITTER: Krivec M

PROVIDER: S-EPMC4701270 | biostudies-literature | 2015 Nov

REPOSITORIES: biostudies-literature

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

Krivec Matic M Mc Gunnigle Gerald G Abram Anže A Maier Dieter D Waldner Roland R Gostner Johanna M JM Überall Florian F Leitner Raimund R

Sensors (Basel, Switzerland) 20151106 11

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 ...[more]

PMID: 26561812

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