Skin moisture measurement on stripping and pasted water by a handy‐type electrostatic sensor

BACKGROUND: There is a need to develop a new device to evaluate and monitor the condition of human skin and make it possible to measure the skin in the diary because the current accuracy of water content measurement in the stratum corneum by capacitance and conductance measurement sensor that are used as the gold standard is insufficient. MATERIALS AND METHODS: The electrostatic sensor is composed of a thin silicone gum sheet and a copper film. In the experiment, skin conditions on six positions such as the forearm, upper arm, and face of a test subject before and after tape stripping are measured by the electrostatic sensor and a commercial sensor. Skin conditions on the forearm of five subjects before and after pasted distilled water were measured by their sensors. RESULTS: The voltages measured by the electrostatic sensor and moisture measured by a commercial sensor are increased with P < 0.01 before and after skin stripping. There were increases in the voltage and the moisture with P < 0.01 before and after pasted distilled water. CONCLUSION: It is suggested that it is possible to measure the moisture on the upper layer of the skin by the electrostatic sensor.