Watch-Type Dual-Mode Wearable Health Device

Wearable devices can be found as numerous types of health devices ranging from monitoring hazardous environments to detecting physiological signals. Its utilities have also shown encouraging improvements toward personalized healthcare. Thus, many kinds of wearable health devices (WHD) have been reported and developed. Those reports highlight their efficiency in monitoring harmful environmental factors and various diseases for diagnostic and treatment purposes. This paper proposes a watch-type of dual-mode WHD that can perform gaseous phase detection to monitor dangerous environmental situations such as bad air quality and aqueous phase detection to measure physiological signals from human sweat or blood. The proposed system was fabricated on a printed circuit board and its size is 3 cm × 3 cm which is suitable as a wearable device. It also consumes very low power and has capabilities of wired/wireless charging and wired/wireless communication. Furthermore, customized windows and Android applications have been developed to visualize obtained data in a user’s computer or smartphone. The system was tested both electrically and chemically and showed promising results as the WHD.