Thermal-based Skin Moisture Device
with Contact Pressure Sensor


 

We proposed the thermal-based contact sensor to measure water content in the skin noninvasively and locally. Unlike electrical methods which are widely used in cosmetic field, our sensor was little affected by presence of substance on skin surface. Water content difference of a target was clarified from a step response of a single resistive temperature detector (RTD), when it worked as a heat source by self-heating. Difference in water content of the human skin before-and-after water immersion was actually detectable by measuring the step response of self-heating RTD in 3 seconds.

References :
Koki Katoh, Yasutaka Ichikawa, Eiji Iwase, Kiyoshi Matsumoto, Isao Shimoyama, gThermal-based skin moisture device with contact pressure sensor ,hIEEE 23rd International Conference on Micro Electro Mechanical Systems (MEMS '10), pp.276-279, Hong Kong, China, Jan. 25-28, 2010D [Proceedings]