학술논문
Quantitative Ethylene Measurements with MOx Chemiresistive Sensors at Different Relative Air Humidities.
Document Type
Article
Author
Source
Subject
*ETHYLENE
*DETECTORS
*METALLIC oxides
*TUNGSTEN oxides
*HUMIDITY
*ACCURACY
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*
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Language
ISSN
1424-8220
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). [ABSTRACT FROM AUTHOR]