<html><head></head><body><div class="ydpf58d42fdyahoo-style-wrap" style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:16px;"><div></div>
<div>James, </div><div>maybe just have a spare fan! </div><div>If the scrubber failed it would either be the power supply or the fan, or clogging with soggy absorbent (which could be replaced). </div><div>It would take a while for the sub to get to dangerous CO2 levels if the scrubber broke down. And you would just head for the surface anyway. </div><div>Perhaps look at ways of switching between power sources easily. </div><div>On my build, which is a small one person, I am having two scrubbers (as Deep Worker does). </div><div>Another thought is to tip out half the absorbent and try the manual method through a thinner layer of absorbent! </div><div>Alan</div><div><br></div>
<div id="ydpf58d42fdyahoo_quoted_4537594368" class="ydpf58d42fdyahoo_quoted">
<div style="font-family:'Helvetica Neue', Helvetica, Arial, sans-serif;font-size:13px;color:#26282a;">
<div>
On Monday, June 21, 2021, 06:35:01 AM GMT+12, James Frankland via Personal_Submersibles <personal_submersibles@psubs.org> wrote:
</div>
<div><br></div>
<div><br></div>
<div><div id="ydpf58d42fdyiv6053213069"><div dir="ltr">Hi all.<div>Ive been experimenting with various manual "breath through" scrubbers for use in an emergency, and i have finally come up with a solution that works for me. </div><div><br></div><div>Ive been testing an anesthesia scrubber cartridge. This has turned out really well.</div><div><br></div><div>Previously I made breathing tubes and masks that utilized the main scrubber, but the trouble is that they were all too difficult to breath through. I made one with a battery electric fan to assist in breathing and even one with a CPR bulb in line to assist. Nothing really worked, but this new one is really good.</div><div><br></div><div>Its a cartridge for an anesthesia machine and has spherical balls on CO2 absorbent which makes it easy to breath through. I used various different masks until i got one that was easy enough to adapt to the hose and comfortable.</div><div><br></div><div>I only did half an hour as it was so hot, but I got cabin CO2 from 5000ppm to 600ppm I think. The main scrubber was on, but obviously the manual one was taking the most of it. <br></div><div><br></div><div>Anyway, I feel much more confident I can control CO2 in an emergency now.</div><div><br></div><div>If anyone is interested, i can send more details of the parts used and modifications, which were super simple.</div><div><br></div><div>Pic attached and a video of me using it. Skip to 7:35 for the manual scrubber test.</div><div><br></div><div>Regards</div><div>James</div><div><br></div><div><a href="https://www.youtube.com/watch?v=yyHlPgrN57Q" rel="nofollow" target="_blank">https://www.youtube.com/watch?v=yyHlPgrN57Q</a></div><div><br></div><div> <br></div><img src="cid:GHaN6uyGtvcJJbhTyJ4B" alt="20210619_170803.jpg" width="542" height="407"><br></div>
</div>_______________________________________________<br>Personal_Submersibles mailing list<br><a href="mailto:Personal_Submersibles@psubs.org" rel="nofollow" target="_blank">Personal_Submersibles@psubs.org</a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" rel="nofollow" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br></div>
</div>
</div></div></body></html>