A thermal RF ammeter with sensing element and galvanometer.
<a href="//www.flickr.com/people/98773380@N05" class="extiw" title="flickruser:98773380@N05">b316728</a>
CC BY 2.0
<a href="//commons.wikimedia.org/wiki/Flickr" class="mw-redirect" title="Flickr">Flickr</a>: <a rel="nofollow" class="external text" href="https://www.flickr.com/photos/98773380@N05/12011783386">RF ammeter VF4</a>