The probe of the combined air velocity and air temperature meter, thermal <a href="https://en.wikipedia.org/wiki/anemometer" class="extiw" title="en:anemometer">anemometer</a>, type TSI VelociCalc 9535.
<a href="//commons.wikimedia.org/wiki/User:Harke" title="User:Harke">Harke</a>
<span class="int-own-work" lang="en">Own work</span>