<DIV style="font-family:Arial, sans-serif; font-size:10pt;"><FONT size="2">Is is possible to get a very sensitive hydrogen sensor?</FONT><DIV><FONT size="2"><BR></FONT></DIV><DIV><FONT size="2">Brian</FONT></DIV><DIV><FONT size="2"><BR></FONT></DIV><DIV><FONT size="2"><BR></FONT><BR><SPAN style="font-size: 10pt;">--- personal_submersibles@psubs.org wrote:</SPAN><BR><BR><SPAN style="font-size: 10pt;">From: Alan via Personal_Submersibles <personal_submersibles@psubs.org></SPAN><BR><SPAN style="font-size: 10pt;">To: Personal Submersibles General Discussion <personal_submersibles@psubs.org></SPAN><BR><SPAN style="font-size: 10pt;">Subject: Re: [PSUBS-MAILIST] Air comp battery compartment</SPAN><BR><SPAN style="font-size: 10pt;">Date: Mon, 27 May 2019 01:46:33 +1200</SPAN><BR><BR><DIV style="font-size: 10pt;"></DIV><DIV style="font-size: 10pt;">AGMs are hard to compensate because they need 1-6psi internal</DIV><DIV style="font-size: 10pt;">pressure to re-absorb their gasses. </DIV><DIV style="font-size: 10pt;">I had them in my ambient & used two one way 3psi cracking pressure</DIV><DIV style="font-size: 10pt;">valves ( one letting air in, one letting pressure out) to maintain at least</DIV><DIV style="font-size: 10pt;">3psi inside their housing.</DIV><DIV style="font-size: 10pt;">I also used pure silicone oil to limit the volume of air needed. Cheap </DIV><DIV style="font-size: 10pt;">Scented silicone oil caused them to off gas. BTW they lasted for years.</DIV><DIV style="font-size: 10pt;">Alan</DIV><DIV style="font-size: 10pt;"><BR></DIV><DIV style="font-size: 10pt;"><BR>On 26/05/2019, at 11:34 PM, Jon Wallace via Personal_Submersibles <<A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A>> wrote:<BR><BR></DIV><BLOCKQUOTE style="font-size: 10pt;"><DIV><DIV style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:16px"><DIV><SPAN>This was my understanding also, that AGMs don't vent under use. Charging, yes, but the box could be opened or vented during charging. I wouldn't be using regular wet-cell in this application.</SPAN></DIV><DIV><SPAN><BR></SPAN></DIV><DIV><SPAN>Hank, if the enclosure is designed to have limited tolerance to the dimensions of the batteries the air volume would be within reason I think. I suspect .25 cu ft or less.</SPAN></DIV><DIV><BR><BR></DIV><DIV style="display: block;"> <DIV style="font-family: times new roman, new york, times, serif; font-size: 16px;"> <DIV style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <DIV dir="ltr"> <FONT size="2" face="Arial"> <HR size="1"> <B><SPAN style="font-weight:bold;">From:</SPAN></B> Brian Cox via Personal_Submersibles <<A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A>><BR> <B><SPAN style="font-weight: bold;">To:</SPAN></B> Personal Submersibles General Discussion <<A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A>> <BR> <B><SPAN style="font-weight: bold;">Sent:</SPAN></B> Saturday, May 25, 2019 10:18 PM<BR> <B><SPAN style="font-weight: bold;">Subject:</SPAN></B> Re: [PSUBS-MAILIST] Air comp battery compartment<BR> </FONT> </DIV> <DIV><BR><DIV><DIV><DIV style="font-family:Arial, sans-serif;font-size:10pt;"><FONT size="2" style=""><FONT face="Arial, sans-serif">If you could use AGM batteries there would not be the explosion issue.</FONT></FONT><DIV><FONT face="Arial, sans-serif" size="2"><BR></FONT></DIV><DIV><FONT face="Arial, sans-serif" size="2">Brian</FONT></DIV><DIV><FONT face="Arial, sans-serif" size="2"><BR></FONT></DIV><DIV><FONT face="Arial, sans-serif" size="2"><BR></FONT></DIV></DIV></DIV></DIV><BR></DIV> </DIV> </DIV> </DIV></DIV></DIV></BLOCKQUOTE><BLOCKQUOTE style="font-size: 10pt;"><DIV><SPAN>_______________________________________________</SPAN><BR><SPAN>Personal_Submersibles mailing list</SPAN><BR><SPAN><A href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</A></SPAN><BR><SPAN><A href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</A></SPAN><BR></DIV></BLOCKQUOTE><SPAN style="font-size: 10pt;">_______________________________________________
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