Portable and low-cost humidity sensing platform based on quartz crystal microbalance and Arduino

Shengjie Xu; Guodong Zhang; Zhou Zheng; Zhendong Sun; Xiaomin Wang; Xu Kong

doi:10.1117/12.2602902

2 July 2021 Portable and low-cost humidity sensing platform based on quartz crystal microbalance and Arduino

Shengjie Xu, Guodong Zhang, Zhou Zheng, Zhendong Sun, Xiaomin Wang, Xu Kong

Proceedings Volume 11887, International Conference on Sensors and Instruments (ICSI 2021); 118870J (2021) https://doi.org/10.1117/12.2602902
Event: International Conference on Sensors and Instruments 2021, 2021, Qingdao, China

Abstract

This study reports a portable and economical humidity sensing platform based on the quartz crystal microbalance (QCM). Although QCM sensors have been widely adopted for moisture sensing, the vast majority of such sensors are limited to laboratory tests due to the lack of portability. This work employed a low-cost Arduino microcontroller board and the Pierce oscillator to track the resonance frequency of the QCM sensor, which made the sensing system highly compact and portable. The efficacy of the sensing platform was validated by humidity sensing measurements. Graphene oxide (GO), MXene, and their composite (MXene/GO) were coated on the surface of three QCM sensors to provide oxygen-containing functional groups for interaction with water molecules. The humidity sensing properties of the three sensors were evaluated and compared over the RH range of 0% to 84%. All three sensors showed decent humidity sensing performance in terms of sensitivity, response/recovery time, hysteresis, and accuracy. The QCM-GO sensor exhibited the highest RH sensitivity of 38.5 Hz/%RH, shortest response/recovery time of 15 s/9 s, and lowest hysteresis, while the QCM-MXene/GO sensor revealed the lowest frequency drift of less than 0.7% in a constant RH environment over 30 minutes.

Citation Download Citation

Shengjie Xu, Guodong Zhang, Zhou Zheng, Zhendong Sun, Xiaomin Wang, and Xu Kong "Portable and low-cost humidity sensing platform based on quartz crystal microbalance and Arduino", Proc. SPIE 11887, International Conference on Sensors and Instruments (ICSI 2021), 118870J (2 July 2021); https://doi.org/10.1117/12.2602902

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