Study on measurement system of skin moisture content

Abstract

We have developed a sensor for measuring the moisture content of the skin surface using skin impedance. So far, it has been developed a device that uses the principle that changes in capacitance and conductivity of the high-frequency current vary in proportion to the amount of skin moisture non- invasively and quantitatively. Even if measurements of the skin moisture content have been successfully realized, the quantitative evaluation of the amount of water that specializes in the stratum corneum of the skin has not been carried out yet. Therefore, we have investigated the stability of the value of the water in the stratum corneum. We built several electrodes which have different width, between width, length and comb number. We measured the resistance and reactance using a different frequency of measurement depth due to the shape of the electrode.