<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>That's a great link Cliff, have bookmarked it.</div><div>I am wanting something to link to a plc & they have some treat options.</div><div>How come you didn't buy a unit with a wider range?</div><div>Phil's life support paper is saying we can take 3% for 1 hour, but the</div><div>range on the one you bought is 0 to 1%.</div><div>Sorry you aren't making it to Bellingham. It was a real treat seeing the R 300</div><div>in Florida.</div><div>Alan</div><div><br><br>Sent from my iPad</div><div><br>On 19/07/2014, at 12:25 pm, Cliff Redus via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br><br></div><blockquote type="cite"><div><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12pt"><div><span>I use a K-30, part number SE-0018 , 0-10,000 ppm (0-1%) CO2 sensor from a company CO2 meters inc. The cost is $85 and it sends a 0-5 VDC output sensor.</span></div><div style="color: rgb(0, 0, 0); font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px; font-style: normal; background-color: transparent;"><span><br></span></div><div style="color: rgb(0, 0, 0); font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px; font-style: normal; background-color: transparent;"><span><a href="http://www.co2meter.com/collections/co2-sensors/products/k-30-co2-sensor-module">http://www.co2meter.com/collections/co2-sensors/products/k-30-co2-sensor-module</a></span></div><div></div><div> Has worked flawlessly.</div><div><br></div><div>Cliff</div><div><br><br><br><br></div><div><br>Cliff Redus<br>Redus Engineering<br>USA mobile: 830-931-1280<br><a href="mailto:cliffordredus@sbcglobal.com">cliffordredus@sbcglobal.com</a> </div><div><br></div> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12pt;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12pt;"> <div dir="ltr"> <div style="margin: 5px 0px; padding: 0px; border: 1px solid rgb(204, 204, 204); border-image: none; height: 0px; line-height: 0; font-size: 0px;" contenteditable="false" readonly="true"></div> <font face="Arial" size="2"> <b><span style="font-weight: bold;">From:</span></b> Pete
Niedermayr 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> Friday, July 18, 2014 7:05 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [PSUBS-MAILIST] O2 regulator<br> </font> </div> <div><br><br clear="none">Cliff, What are you using for a CO2 sensor?<br clear="none"><br clear="none">Thanks Pete<br clear="none"><br clear="none">--------------------------------------------<br clear="none">On Thu, 7/17/14, Cliff Redus via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br clear="none"><br clear="none"> Subject: Re: [PSUBS-MAILIST] O2 regulator<br clear="none"> To: "Personal Submersibles General
Discussion" <<a href="mailto:personal_submersibles@psubs.org" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none"> Date: Thursday, July 17, 2014, 8:30 AM<br clear="none"> <br clear="none"> Hank<br clear="none"> On the R300, I have life support<br clear="none"> module I call the AMOC system (Air monitoring and Oxygen<br clear="none"> Control). Connected to the box is a 1/4" SS tubing<br clear="none"> with Swagelok fittings connected to a O2 supply from an<br clear="none"> external 2200 psig O2 bottle. I fill this with welding O2<br clear="none"> with a whip. In the AMOC module is a medical pressure<br clear="none"> reducing regulator (Hudson model 2000). This regulator <br clear="none"> reduces the pressure to around 5 psig. The pressure<br clear="none"> downstream of the regulator is adjustable with a maximum<br clear="none"> rate of 15
SLPM. The porting on this regulator is two<br clear="none"> 1/4" NPT HP ports and one LP port. Downstream of<br clear="none"> this regulator, I have installed an O2 thermal mass meter/<br clear="none"> controller from Porter. <br clear="none"> The model number is 201-FSVP. This controller can be set<br clear="none"> from 0-10 SLPM via an 0-5V analog input signal. Max<br clear="none"> pressure on the O2 controller is 25 psig. This O2<br clear="none"> controller also sends out at 0-5V analog output signal of<br clear="none"> the O2 SLPM flow rate.<br clear="none"> Both these items were purchased on<br clear="none"> Ebay at a fraction of list. I have been very happy<br clear="none"> with the performance of these units. By measuring the O2<br clear="none"> and CO2 percentages in the cabin, I have a PLC that opens<br clear="none"> and closes this controller to keep the
cabin O2 % between<br clear="none"> 19-22%. ABS regulations requires that the O2 be held with<br clear="none"> in 18-24%. The advantage of this system is that it<br clear="none"> automatically accounts for different metabolic consumptions<br clear="none"> rates for O2. In the AMOC unit, I have a Swagelok needle<br clear="none"> valve in a bypass around this controller so that if both<br clear="none"> main and back up power are lost, the pilot can manually<br clear="none"> adjust the O2 rate<br clear="none"> into the boat.<br clear="none"> The<br clear="none"> second part to controlling the atmosphere in the cabin is<br clear="none"> scrubbing the CO2. I initially used a axial flow filter<br clear="none"> with SodaSorb HP. I found that the axial flow filter did<br clear="none"> not work very well with CO2 in the cabin ranging from 0-7000<br clear="none"> ppm. Part of the problem was the axial
filter arrangement<br clear="none"> and part of the problem was the blower was not strong<br clear="none"> enough. At the 2012 PSUB convention in Vancouver, Alec<br clear="none"> Symth brought the scrubber he was using on Snoopy as a<br clear="none"> show and tell. His scrubber is an OTS radial filter that<br clear="none"> is used to clean air. In 2013, I switch to this type of<br clear="none"> scrubber/filer again with SodaSorb HB and the scrubber has<br clear="none"> worked much better. It consistently keeps the CO2 level<br clear="none"> below 2000 ppm with most of the time it being 1000-1500<br clear="none"> ppm. ABS rules require that you keep O2 concentration<br clear="none"> below 5000 ppm. Part of the reason that is works better<br clear="none"> is the radial design which minimizes the pressure drop<br clear="none"> through the Sodasorb and part is that I have switched to a<br clear="none"> stronger blower.<br clear="none"> Long<br clear="none"> answer to short question.<br clear="none"> <br clear="none"> Cliff<br clear="none"> <br clear="none"> <br clear="none"> <br clear="none"> <br clear="none"> <br clear="none"> On Thursday, July 17, 2014 9:27 AM,<br clear="none"> hank pronk via Personal_Submersibles<br clear="none"> <<a href="mailto:personal_submersibles@psubs.org" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br clear="none"> <br clear="none"> <br clear="none"> Hi All,I need to find a pediatric<br clear="none"> flow meter and regulator for Gamma. Or is there something<br clear="none"> better?Hank<br clear="none"> _______________________________________________<br clear="none"> Personal_Submersibles mailing list<br clear="none"> <a href="mailto:Personal_Submersibles@psubs.org" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"> <a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank" shape="rect">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"> <br clear="none"> <br clear="none"> <br clear="none"> <br clear="none"> -----Inline Attachment Follows-----<div id="yqtfd24320"><br clear="none"> <br clear="none"> _______________________________________________<br clear="none"> Personal_Submersibles mailing list<br clear="none"> <a href="mailto:Personal_Submersibles@psubs.org" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"> <a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank" shape="rect">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"> <br clear="none"><br clear="none">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a href="mailto:Personal_Submersibles@psubs.org" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank" shape="rect">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a></div><br><br></div> </div> </div> </div></div></blockquote><blockquote type="cite"><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></body></html>