Quantitative Ethylene Measurements with MOx Chemiresistive Sensors at Different Relative Air Humidities.
Sensors (Basel)
; 15(11): 28088-98, 2015 Nov 06.
Article
em En
| MEDLINE
| ID: mdl-26561812
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).
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Óxidos
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Tungstênio
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Técnicas de Química Analítica
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Compostos de Estanho
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Etilenos
Tipo de estudo:
Prognostic_studies
Idioma:
En
Ano de publicação:
2015
Tipo de documento:
Article