| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 11016352 | Sensors and Actuators B: Chemical | 2019 | 14 Pages |
Abstract
Due to the influence of temperature, the traditional quartz crystal microbalance (QCM) dew point sensors require an independent study on the temperature frequency characteristics (TFC) for calibrations as the frequency response is susceptible to external interferences. QCM dew point sensors with either montmorillonite (MTT) or molybdenum disulfide (MoS2) coatings together with a dew point recognition algorithm are demonstrated for dew point recognitions. The frequency signals output from three kinds of QCM sensors are processed by the proposed recognition algorithm and compared with the standard dew point data provided by MICHELL S4000. The results show QCM sensors with MTT coating have the best accuracy and repeatability test for 5 days in range of 3ââ DP-15ââ DP environment has shown the maximum relative error as compared with the standard dew-point values is less than ±0.3ââ DP. As such, this work shows the feasibility of utilizing QCM humidity sensors without the influence of temperature on frequency measurements with good repeatability.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Ning Li, Qiyang Huang, Jing Nie, Xiaofeng Meng, Zhongying Wang, Yichuan Wu, Mingjing Qi, Zhiwei Liu, Baoxia Mi, Liwei Lin,