<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/><title></title></head><body><p style="margin: 0px;"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none">I had two beers on that tour. And the other crew also. Only I had the problem. <br /></span></p>
<p style="margin: 0px;"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none">But the other are 15-20 years younger. </span></p>
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<p style="margin: 0px;">Betreff: Re: [PSUBS-MAILIST] ill after a Psub Weekend AW: Project Pilot Fish</p>
<p style="margin: 0px;">Datum: 2016-11-16T04:18:48+0100</p>
<p style="margin: 0px;">Von: "Alan James via Personal_Submersibles" <personal_submersibles@psubs.org></p>
<p style="margin: 0px;">An: "Personal Submersibles General Discussion" <personal_submersibles@psubs.org></p>
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<div id="yui_3_16_0_ym19_1_1479259573536_4617">I was fortunate to have a tour through Carsten's sub.</div>
<div id="yui_3_16_0_ym19_1_1479259573536_4712">I think the answer to his morning after sickness could</div>
<div id="yui_3_16_0_ym19_1_1479259573536_4689" dir="ltr"><span id="yui_3_16_0_ym19_1_1479259573536_4688">be related to the beer holders located every few feet.</span></div>
<div id="yui_3_16_0_ym19_1_1479259573536_4733" dir="ltr">Alan</div>
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<div id="yui_3_16_0_ym19_1_1479259573536_4690" dir="ltr"><hr size="1" /><span style="font-family: Arial; font-size: small;"><strong><span style="font-weight: bold;">From:</span></strong> River Dolfi via Personal_Submersibles <personal_submersibles@psubs.org><br /> <strong><span style="font-weight: bold;">To:</span></strong> personal_submersibles@psubs.org <br /> <strong><span style="font-weight: bold;">Sent:</span></strong> Wednesday, November 16, 2016 3:50 PM<br /> <strong><span style="font-weight: bold;">Subject:</span></strong> Re: [PSUBS-MAILIST] ill after a Psub Weekend AW: Project Pilot Fish<br /> </span></div>
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<div>I've actually spent the last 3 years developing novel gas sensors in several air quality laboratories, so I guess I could say I'm somewhat of an expert.<br /><br /></div>
Antoine, do you have a link for your sensors? I suspect they are electro-chemical cells, which I've worked with extensively. The bad news is the cross sensitivity, the good news is that the behavior is rather linear, and using a second semiconductor based sensor sensitive to just hydrogen one can just subtract one from the other to find true CO.<br /><br /></div>
<div>Or you could try a low cross sensitivity electro-chemical cell. Here is a manufacturer in the UK who I've worked with and can vouch for their products quality <a href="http://www.alphasense.com/index.php/air/" rel="nofollow">http://www.alphasense.com/index.php/air/</a> They're CO sensor claims a cross sensitivity to H2 of <4%</div>
<div>You do need a driver circuit to read the sensor and output an analog voltage, but they sell those as well.<br /><br /></div>
<div>Carsten, if you've ruled out batteries, electrical issues, and the occupants I think you're issue might be the off gassing of VOC's (volatile organic compounds) from the remaining solvent in your interior paint. They will definitely give you a headache, or get you really high. If that is the culprit, your best course of action would be to vacuum cure the paint. Draw as high a vacuum as you can sustain inside the sub and hold it there over night. Thankfully, this should be pretty easy in a submarine.</div>
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<div class="yiv5375247006gmail_extra"> </div>
<div class="yiv5375247006gmail_extra">One of these days I might get the time to draw up plans for a community life support sensor suite. Only a few more months of university left...</div>
<div class="yiv5375247006gmail_extra"><br />-- <br />
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<div dir="ltr">-River J. Dolfi
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<div><a href="mailto:rdolfi7@gmail.com" rel="nofollow">rdolfi7@gmail.com</a></div>
<div><a href="mailto:rwd5301@psu.edu" rel="nofollow">rwd5301@psu.edu</a></div>
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