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A Quartz Crystal Microbalance dew point sensor without frequency measurement
Ist Teil von
Review of scientific instruments, 2014-11, Vol.85 (11), p.115002
Ort / Verlag
United States
Erscheinungsjahr
2014
Link zum Volltext
Beschreibungen/Notizen
This work deals with the design of a dew point sensor based on Quartz Crystal Microbalance (QCM) without measuring the frequency. This idea is inspired by the fact that the Colpitts oscillation circuit will stop oscillating when the QCM works in the liquid media. The quartz crystal and the electrode are designed through the finite element simulation and the stop oscillating experiment is conducted to verify the sensibility. Moreover, the measurement result is calibrated to approach the true value. At last a series of dew points at the same temperature is measured with the designed sensor. Results show that the designed dew point sensor is able to detect the dew point with the proper accuracy.