<html><head></head><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yui_3_16_0_ym19_1_1479259573536_4617"><span>I was fortunate to have a tour through Carsten's sub.</span></div><div id="yui_3_16_0_ym19_1_1479259573536_4712"><span>I think the answer to his morning after sickness could</span></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"><span>Alan</span></div><div id="yui_3_16_0_ym19_1_1479259573536_4684" dir="ltr"><span></span> </div><div class="qtdSeparateBR" id="yui_3_16_0_ym19_1_1479259573536_4618"><br><br></div><div class="yahoo_quoted" id="yui_3_16_0_ym19_1_1479259573536_4693" style="display: block;"> <div id="yui_3_16_0_ym19_1_1479259573536_4692" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id="yui_3_16_0_ym19_1_1479259573536_4691" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id="yui_3_16_0_ym19_1_1479259573536_4690" dir="ltr"> <font face="Arial" size="2"> <hr size="1"> <b><span style="font-weight: bold;">From:</span></b> River Dolfi via Personal_Submersibles <personal_submersibles@psubs.org><br> <b><span style="font-weight: bold;">To:</span></b> personal_submersibles@psubs.org <br> <b><span style="font-weight: bold;">Sent:</span></b> Wednesday, November 16, 2016 3:50 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [PSUBS-MAILIST] ill after a Psub Weekend AW: Project Pilot Fish<br> </font> </div> <div class="y_msg_container"><br><div id="yiv5375247006"><div dir="ltr"><div><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/" target="_blank" rel="nofollow">http://www.alphasense.com/index.php/air/</a> They're CO sensor claims a cross sensitivity to H2 of <4%<br></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.<br></div><div><div><div><div><div class="yiv5375247006gmail_extra"><br></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...<br clear="all"></div><div class="yiv5375247006gmail_extra"><br>-- <br><div class="yiv5375247006gmail_signature"><div dir="ltr">-River J. Dolfi<div><br><div><a href="mailto:rdolfi7@gmail.com" target="_blank" rel="nofollow" ymailto="mailto:rdolfi7@gmail.com">rdolfi7@gmail.com</a></div><div><a href="mailto:rwd5301@psu.edu" target="_blank" rel="nofollow" ymailto="mailto:rwd5301@psu.edu">rwd5301@psu.edu</a></div></div></div></div>
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