<a href="https://en.wikipedia.org/wiki/Corneometry" class="extiw" title="en:Corneometry">Corneometer</a> probe for measurement of skin hydration
<a href="//commons.wikimedia.org/wiki/User:Xorx" title="User:Xorx">Xorx</a>
<span class="int-own-work" lang="en">Own work</span>