Abstract
The influence of temperature and humidity on the determination of benzene concentration were characterized using a piezoelectric crystal gas sensor. Sensing layers coated with polymethylphenylsiloxane and polyvinylchloride was used for real-time monitoring of benzene, a major atmospheric pollutant. When the humidity was varied from 35% to 75%, the detection limitations of the sensor were reduced and the response and frequency recovery times increased. However, when the temperature was increased from 5 °C to 60 °C, the response and recovery time were decreased but the sensitivity performance was degraded. Models were developed for the correlation between the benzene concentration and temperature and humidity.
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