Citation

Omar Al-haddar, Mohammed Taha and Sin, Yew Keong (2024) Fabrication and Implementation of PVA Thin Film-based Relative Humidity Sensor. International Journal of Integrated Engineering, 16 (3). pp. 15-27. ISSN 2229-838X

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Abstract

This paper presents the fabrication of polyvinyl alcohol (PVA)-based relative humidity sensors using copper interdigitated electrodes (IDEs). These sensors were fabricated by patterning copper IDEs onto FR4 fiberglass substrates and coating them with a thin film of PVA. By varying the number of IDE electrode pairs and the concentration of PVA, the sensors exhibited different resistance values, demonstrating an inverse relationship with the number of IDE electrodes and PVA concentration. Additionally, the thickness of the sensing layer, controlled by spin coating speed, affected the resistance of the sensors. The fabricated sensors achieved a humidity measurement range from 50% to 99% RH based on resistance changes. Furthermore, an interface circuit was designed to integrate the fabricated sensors with an ESP8266 microcontroller, achieving accurate measurements above 74% RH

Item Type:	Article
Uncontrolled Keywords:	Polyvinyl
Subjects:	T Technology > TP Chemical technology > TP1080-1185 Polymers and polymer manufacture
Divisions:	Faculty of Engineering (FOE)
Depositing User:	Ms Nurul Iqtiani Ahmad
Date Deposited:	31 May 2024 07:28
Last Modified:	31 May 2024 07:28
URII:	http://shdl.mmu.edu.my/id/eprint/12512

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