Jeff Gilchrist<p>This is amazing, not only a lower cost CPC for measuring mask fit and ultrafine particles in a room, but also a new probe to measure fit of a respirator without destroying it, check out the video from <span class="h-card" translate="no"><a href="https://bird.makeup/users/openaeros" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>openaeros</span></a></span> and <span class="h-card" translate="no"><a href="https://mstdn.science/@masknerd" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>masknerd</span></a></span> to see how it works ( <a href="https://www.youtube.com/watch?v=R_P0gM5Gudo" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">youtube.com/watch?v=R_P0gM5Gud</span><span class="invisible">o</span></a> ). 🧵 1/</p><p><a href="https://mstdn.science/tags/N95" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>N95</span></a> <a href="https://mstdn.science/tags/CPC" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CPC</span></a> <a href="https://mstdn.science/tags/OpenAeros" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>OpenAeros</span></a> <a href="https://mstdn.science/tags/OpenCPC" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>OpenCPC</span></a> <a href="https://mstdn.science/tags/Respirator" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Respirator</span></a> <a href="https://mstdn.science/tags/FitTesting" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>FitTesting</span></a> <a href="https://mstdn.science/tags/AirCleaner" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>AirCleaner</span></a></p>