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<div dir="ltr" data-setdir="false">Hi Alan,</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">For sure they are a bit upscale in terms of price however CO2 readings are sensitive to temp and relative humidity...O2 readings are sensitive to pressure and temperature. The units I opted for include those additional sensors internally and factor them into the output automatically, which was important to me for accuracy. Given that they both have a greater than 5 year life span, the amortized cost is around $50/year which I found acceptable.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Jon</div><div dir="ltr" data-setdir="false"><br></div><div><br></div>
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On Tuesday, October 24, 2023 at 02:56:41 PM EDT, Alan James via Personal_Submersibles <personal_submersibles@psubs.org> wrote:
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<div><div id="ydp3fe20e54yiv5815454407"><div>Wow, that's expensive at US $259-<div>There are a few options on Ali Express that are 0-5000ppm</div><div>for around N.Z. $20- that have good reviews. However I am not an expert and wouldnt know if they are good quality. </div><div>They are compatible with Arduino etc. </div><div>You could buy 3 at that price & compare the readings to indicate when they fail. Have a spare one to just unplug and replace.</div><div>Alan</div><div><br clear="none"></div><div><br clear="none"><br clear="none"><div id="ydp3fe20e54yiv5815454407ymail_android_signature"><a shape="rect" id="ydp3fe20e54yiv5815454407ymail_android_signature_link" href="https://mail.onelink.me/107872968?pid=nativeplacement&c=Global_Acquisition_YMktg_315_Internal_EmailSignature&af_sub1=Acquisition&af_sub2=Global_YMktg&af_sub3=&af_sub4=100000604&af_sub5=EmailSignature__Static_" rel="nofollow" target="_blank">Sent from Yahoo Mail on Android</a></div> <br clear="none"> <blockquote style="margin:0 0 20px 0;"> <div style="font-family:Roboto, sans-serif;color:#6D00F6;"> <div>On Wed, 25 Oct 2023 at 2:07 am, Jon Wallace via Personal_Submersibles</div><div id="ydp3fe20e54yiv5815454407yqtfd44521" class="ydp3fe20e54yiv5815454407yqt2414114733"><div><personal_submersibles@psubs.org> wrote:</div> </div></div><div id="ydp3fe20e54yiv5815454407yqtfd45651" class="ydp3fe20e54yiv5815454407yqt2414114733"> <div style="padding:10px 0 0 20px;margin:10px 0 0 0;border-left:1px solid #6D00F6;"> _______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a shape="rect" href="mailto:Personal_Submersibles@psubs.org" rel="nofollow" target="_blank">Personal_Submersibles@psubs.org</a><br clear="none"><a shape="rect" 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 clear="none"> </div> </div></blockquote></div></div></div><div class="ydp3fe20e54yqt2414114733" id="ydp3fe20e54yqtfd39994">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a shape="rect" href="mailto:Personal_Submersibles@psubs.org" rel="nofollow" target="_blank">Personal_Submersibles@psubs.org</a><br clear="none"><a shape="rect" 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 clear="none"></div></div>
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