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<div dir="ltr" data-setdir="false">For what it's worth, I have been monitoring CO2 in my house with my SEM analyzer and I'm averaging 2000ppm throughout the day. This is in Florida so the windows and doors are always closed relying on AC.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Also worth noting is Steve McQueen's results in his K-250 without life support. He reached 5000ppm at 14 minutes duration, 10000ppm at 30 minutes duration. Note that these results were "at rest".</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false"><br></div><div><br></div>
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On Friday, October 29, 2021, 10:47:45 AM EDT, Cliff Redus via Personal_Submersibles <personal_submersibles@psubs.org> wrote:
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<div><div id="ydp8e7b7130yiv6480615596"><div>Actually this sensor looks pretty good. Gets humidly and temperature as well. 3% accuracy is a bit weak. Worth considering. <br clear="none"><br clear="none"><div dir="ltr">Sent from my iPhone</div><div dir="ltr"><br clear="none"><blockquote type="cite">On Oct 29, 2021, at 8:44 AM, Jon Wallace via Personal_Submersibles <personal_submersibles@psubs.org> wrote:<br clear="none"><br clear="none"></blockquote></div><blockquote type="cite"><div dir="ltr"><div class="ydp8e7b7130yiv6480615596ydpf3048b3fyahoo-style-wrap" style="font-family:times new roman, new york, times, serif;font-size:16px;"><div></div>
<div dir="ltr">Thanks for the tip. The Sensirion SCD30 costs about $60 compared to the GSS Cozir I have been using at $109. Specifications from datasheet look similar although the SCD30 shows a lifetime of 15 years compared to COZIR which shows 5 years. Big advantage if true, but we better get one going soon because a lot of us aren't going to be around, or will be in our own la-la land, by 2036 when it comes time to see if it's still working accurately. Great selling point for us senior members..."the last CO2 sensor you'll ever need!" :) :) </div><div dir="ltr"><br clear="none"></div><div dir="ltr">Jon</div><div dir="ltr"><br clear="none"></div><div><br clear="none"></div>
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On Thursday, October 28, 2021, 07:41:02 PM EDT, Michael Holt via Personal_Submersibles <personal_submersibles@psubs.org> wrote:
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<font size="+1"><font face="Arial">In the current issue of <i>MAK</i><i>E
</i>magazine, there's an article called "Fresh Air."
Instructions for making several different monitor start on page
24. One of them is small enough to fit into a large finger
ring. I've not done anything like that for 40 years, so I'm not
going to think about evaluating it.<br clear="none">
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The article is "ROBO-BOAT." That's about an autonomous boat.<br clear="none">
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$14.99, so it's a bit expensive for a magazine. <br clear="none">
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