Dew point fast measurement in organic vapor mixtures using quartz resonant sensor.
A fast dew point sensor has been developed for organic vapor mixtures by using the quartz crystal with sensitive circuits. The sensor consists of the quartz crystal and a cooler device. Proactive approach is taken to produce condensation on the surface of the quartz crystal, and it will lead to a change in electrical features of the quartz crystal. The cessation of oscillation was measured because this phenomenon is caused by dew condensation. Such a phenomenon can be used to detect the dew point. This method exploits the high sensitivity of the quartz crystal but without frequency measurement and also retains the stability of the resonant circuit. It is strongly anti-interfered. Its performance was evaluated with acetone-methanol mixtures under different pressures. The results were compared with the dew points predicted from the universal quasi-chemical equation to evaluate the performance of the proposed sensor. Though the maximum deviations of the sensor are less than 1.1 °C, it still has a fast response time with a recovery time of less than 10 s, providing an excellent dehumidifying performance.
School of Instrumentation Science and Opto-electronics Engineering, Beihang University, Beijing 100191, China.
Jing
0000000217093288
J
Nie
Software Engineering College, Zhengzhou University of Light Industry, Zhengzhou 450002, China.
Jia
J
Liu
School of Instrumentation Science and Opto-electronics Engineering, Beihang University, Beijing 100191, China.
Xiaofeng
X
Meng