physiological signals must be able to measure for a long time in daily life. Therefore, the health monitoring device was made as small as possible, and sensors must have a small effect by motion artifact. To reduce impedance between the user skin and the electrode, a conductive gel was applied to the metallic electrode, thereby facilitating converting ion current flowing in a living body into an electric current.

physiological signals must be able to measure for a long time in daily life. Therefore, the health monitoring device was made as small as possible, and sensors must have a small effect by motion artifact. To reduce impedance between the user skin and the electrode, a conductive gel was applied to the metallic electrode, thereby facilitating converting ion current flowing in a living body into an electric current.