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Article

Quick and Sensitive Detection of Water Using Galvanic-Coupled Arrays with a Submicron Gap for the Advanced Prediction of Dew Condensation

1
Electric and Electronic Materials Field, Electrochemical Sensors Group, Research Center for Functional Materials, National Institute for Materials Science, Ibaraki 305-0044, Japan
2
Graduate School of Engineering, Chiba Institute of Technology, Chiba 275-0016, Japan
*
Author to whom correspondence should be addressed.
Sensors 2020, 20(11), 3314; https://doi.org/10.3390/s20113314
Received: 8 May 2020 / Revised: 31 May 2020 / Accepted: 6 June 2020 / Published: 10 June 2020
(This article belongs to the Section Physical Sensors)
We have demonstrated a highly sensitive moisture sensor that can detect water molecules, in addition to water droplets, and therefore, can predict dew condensation with high accuracy and high speed before the formation of water droplets, showing a better performance than a commercial hygrometer. Additionally, the dependence of the output response from the sensor on factors, such as the cooling rate of the sensor’s surface and the vapor pressure in the chamber, that affect the performance of the moisture sensor has been clarified. The output response showed a clear dependence on the variation in cooling rate, as well as the vapor pressure. The higher the cooling rate and vapor pressure, the higher the output response. The output response showed a linear response to the change in the above-mentioned parameters. The higher sensitivity and accuracy of the moisture sensor, as a function of the physical parameters, such as cooling rates, vapor pressure, enables the sensor to perform in advanced detection applications. The sensor can be modified to the actual target regarding the surface nature and the heat capacity of the target object, making it more suitable for wide applications. View Full-Text
Keywords: galvanic current; electrodes; thin film of water molecules; cooling rate; vapor pressure; sensitivity and accuracy galvanic current; electrodes; thin film of water molecules; cooling rate; vapor pressure; sensitivity and accuracy
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MDPI and ACS Style

Shrestha, R.G.; Kubota, Y.; Sakamoto, Y.; Kawakita, J. Quick and Sensitive Detection of Water Using Galvanic-Coupled Arrays with a Submicron Gap for the Advanced Prediction of Dew Condensation. Sensors 2020, 20, 3314. https://doi.org/10.3390/s20113314

AMA Style

Shrestha RG, Kubota Y, Sakamoto Y, Kawakita J. Quick and Sensitive Detection of Water Using Galvanic-Coupled Arrays with a Submicron Gap for the Advanced Prediction of Dew Condensation. Sensors. 2020; 20(11):3314. https://doi.org/10.3390/s20113314

Chicago/Turabian Style

Shrestha, Rekha G.; Kubota, Yusuke; Sakamoto, Yukihiro; Kawakita, Jin. 2020. "Quick and Sensitive Detection of Water Using Galvanic-Coupled Arrays with a Submicron Gap for the Advanced Prediction of Dew Condensation" Sensors 20, no. 11: 3314. https://doi.org/10.3390/s20113314

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