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. The telescope probe has a maximum legth of 101 cm suitable for measurements at difficult to reach locations.
<a href="//commons.wikimedia.org/wiki/User:Harke" title="User:Harke">Harke</a>
<span class="int-own-work" lang="en">Own work</span>