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<div><font class="Apple-style-span" size="3">Vance<br>
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<div style="font-family: helvetica, arial; font-size: 10pt; color: black; ">-----Original Message-----<br>
From: Cliff Redus via Personal_Submersibles <personal_submersibles@psubs.org><br>
To: Personal Submersibles General Discussion <personal_submersibles@psubs.org><br>
Sent: Tue, Jul 22, 2014 9:15 pm<br>
Subject: Re: [PSUBS-MAILIST] O2 regulator<br>
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<div>On the R300, I use a MAX-250 O2 sensor from Maxtec. While this has worked fine, it is just the sensor element. You need a circuit board to convert to 0-5 VDC analog signal the PLC can take as an input. I had a friend design and fabricate the board several years ago.</div>
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<div>For the new boat I am designing, I like the UV-FLux 25% sensor from CO2 meters inc. <a target="_blank" href="http://co2meters.com/Documentation/Datasheets/DS-CM-0201-UV-Flux.pdf">http://co2meters.com/Documentation/Datasheets/DS-CM-0201-UV-Flux.pdf</a> This sensor will handle 0-25%. The sensor output is 3.3V TTL level RS232. All PLCs will have a RS232 port. I would have preferred the output to be an analog voltage output
of 0-5 VDC like the CO2 sensor from them I use but this will work ok. With this sensor you can connect directly to PLC.</div>
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<div><a target="_blank" href="http://co2meters.com/Documentation/Manuals/Manual-CM-0201-UV-Flux-Oxygen.pdf">http://co2meters.com/Documentation/Manuals/Manual-CM-0201-UV-Flux-Oxygen.pdf</a> is the manual for the sensor.</div>
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<div>Cliff</div>
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Cliff Redus<br>
Redus Engineering<br>
USA mobile: 830-931-1280<br>
<a href="mailto:cliffordredus@sbcglobal.com">cliffordredus@sbcglobal.com</a> </div>
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<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> Tuesday, July 22, 2014 5:54 PM<br>
<b><span style="font-weight: bold;">Subject:</span></b> Re: [PSUBS-MAILIST] O2 regulator<br>
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<br clear="none">Cliff, I forgot to ask. What are you using for an O2 sensor ?<br clear="none"><br clear="none">Thanks Pete --------------------------------------------<br clear="none">On Sat, 7/19/14, Alan via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" shape="rect">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">personal_submersibles@psubs.org</a>><br clear="none"> Date: Saturday, July 19, 2014, 1:01 PM<br clear="none"> <br clear="none"> That's a<br clear="none"> great link Cliff, have bookmarked it.I am wanting<br clear="none"> something to link to a plc & they have some treat<br clear="none"> options.How come you didn't buy a unit with a<br clear="none"> wider range?Phil's life support paper is<br clear="none"> saying we can take 3% for 1 hour, but therange on<br clear="none"> the one you bought is 0 to 1%.Sorry you<br clear="none"> aren't making it to Bellingham. It was a real treat<br clear="none"> seeing
the R 300in<br clear="none"> Florida.Alan<br clear="none"> <br clear="none"> Sent from my iPad<br clear="none"> On<br clear="none"> 19/07/2014, at 12:25 pm, Cliff Redus via<br clear="none"> Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" shape="rect">personal_submersibles@psubs.org</a>><br clear="none"> wrote:<br clear="none"> <br clear="none"> I use a K-30, part<br clear="none"> number SE-0018 , 0-10,000 ppm (0-1%) CO2 sensor from a<br clear="none"> company CO2 meters inc. The cost is $85 and it sends a 0-5<br clear="none"> VDC output sensor.<br clear="none"> <a target="_blank" href="http://www.co2meter.com/collections/co2-sensors/products/k-30-co2-sensor-module Has" shape="rect">http://www.co2meter.com/collections/co2-sensors/products/k-30-co2-sensor-module Has</a><br clear="none"> worked flawlessly.<br clear="none"> Cliff<br clear="none"> <br clear="none"> <br clear="none"> <br clear="none"> <br clear="none"> Cliff Redus<br clear="none"> Redus Engineering<br clear="none"> USA<br clear="none"> mobile: 830-931-1280<br clear="none"> <a href="mailto:cliffordredus@sbcglobal.com" shape="rect">cliffordredus@sbcglobal.com</a><br clear="none"> <br clear="none"> From: Pete<br clear="none"> Niedermayr via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" shape="rect">personal_submersibles@psubs.org</a>><br clear="none"> To: Personal<br clear="none"> Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org" shape="rect">personal_submersibles@psubs.org</a>><br clear="none"> <br clear="none"> Sent: Friday, July 18,<br clear="none"> 2014 7:05 PM<br clear="none"> Subject: Re:<br clear="none"> [PSUBS-MAILIST] O2 regulator<br clear="none"> <br clear="none"> <br clear="none"> <br clear="none"> Cliff, What are you<br clear="none"> 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<br clear="none"> Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" shape="rect">personal_submersibles@psubs.org</a>><br clear="none"> wrote:<br clear="none"> <br clear="none"> Subject: Re:<br clear="none"> [PSUBS-MAILIST] O2 regulator<br clear="none"> To:<br clear="none"> "Personal Submersibles General<br clear="none"> Discussion" <<a href="mailto:personal_submersibles@psubs.org" shape="rect">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<br clear="none"> R300, I have life support<br clear="none"> module I call the<br clear="none"> AMOC system (Air monitoring and Oxygen<br clear="none"> <br clear="none"> Control). Connected to the box is a 1/4" SS tubing<br clear="none"> with Swagelok fittings connected to a O2<br clear="none"> supply from an<br clear="none"> external 2200 psig O2<br clear="none"> bottle. I fill this with welding O2<br clear="none"> with a<br clear="none"> whip. In the AMOC module is a medical pressure<br clear="none"> reducing regulator (Hudson model 2000). This<br clear="none"> regulator <br clear="none"> reduces the pressure to around<br clear="none"> 5 psig.
The pressure<br clear="none"> downstream of the<br clear="none"> regulator is adjustable with a maximum<br clear="none"> rate<br clear="none"> of 15<br clear="none"> SLPM. The porting on this regulator is two<br clear="none"> 1/4" NPT HP ports and one LP<br clear="none"> port. Downstream of<br clear="none"> this regulator, I<br clear="none"> have installed an O2 thermal mass meter/<br clear="none"> <br clear="none"> controller from Porter. <br clear="none"> The model<br clear="none"> number is 201-FSVP. This controller can be set<br clear="none"> from 0-10 SLPM via an 0-5V analog input<br clear="none"> signal. Max<br clear="none"> pressure on the O2 controller<br clear="none"> is 25 psig. This O2<br clear="none"> controller also sends<br clear="none"> out at 0-5V analog output signal of<br clear="none"> the O2<br clear="none">
SLPM flow rate.<br clear="none"> Both these items were<br clear="none"> purchased on<br clear="none"> Ebay at a fraction of<br clear="none"> list. I have been very happy<br clear="none"> with<br clear="none"> the performance of these units. By measuring the O2<br clear="none"> and CO2 percentages in the cabin, I have a PLC<br clear="none"> that opens<br clear="none"> and closes this controller to<br clear="none"> keep the<br clear="none"> cabin O2 % between<br clear="none"> 19-22%. ABS<br clear="none"> regulations requires that the O2 be held with<br clear="none"> in 18-24%. The advantage of this system is<br clear="none"> that it<br clear="none"> automatically accounts for<br clear="none"> different metabolic consumptions<br clear="none"> rates for<br clear="none"> O2. In the AMOC unit, I have a Swagelok needle<br clear="none">
valve in a bypass around this controller so<br clear="none"> that if both<br clear="none"> main and back up power are<br clear="none"> lost, the pilot can manually<br clear="none"> adjust the O2<br clear="none"> rate<br clear="none"> into the boat.<br clear="none"> <br clear="none"> The<br clear="none"> second part to controlling the<br clear="none"> atmosphere in the cabin is<br clear="none"> scrubbing the<br clear="none"> CO2. I initially used a axial flow filter<br clear="none"> <br clear="none"> with SodaSorb HP. I found that the axial flow filter<br clear="none"> did<br clear="none"> not work very well with CO2 in the<br clear="none"> cabin ranging from 0-7000<br clear="none"> ppm. Part of<br clear="none"> the problem was the axial<br clear="none"> filter arrangement<br clear="none"> and part of the problem<br clear="none"> was the blower was not strong<br clear="none"> enough. At<br clear="none"> the 2012 PSUB convention in Vancouver, Alec<br clear="none"> <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<br clear="none"> filter that<br clear="none"> is used to clean air. In<br clear="none"> 2013, I switch to this type of<br clear="none"> <br clear="none"> scrubber/filer again with SodaSorb HB and the scrubber<br clear="none"> has<br clear="none"> worked much better. It consistently<br clear="none"> keeps the CO2 level<br clear="none"> below 2000 ppm with<br clear="none"> most of the time it being 1000-1500<br clear="none"> ppm. <br clear="none"> ABS rules require that you keep O2 concentration<br clear="none"> below 5000 ppm. Part of the reason that is<br clear="none"> works better<br clear="none"> is the radial design
which<br clear="none"> minimizes the pressure drop<br clear="none"> through the<br clear="none"> 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">personal_submersibles@psubs.org</a>><br clear="none"> 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<br clear="none"> there something<br clear="none"> better?Hank<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">Personal_Submersibles@psubs.org</a><br clear="none"> <a target="_blank" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" 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<br clear="none"> Follows-----<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">Personal_Submersibles@psubs.org</a><br clear="none"> <a target="_blank" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" 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">Personal_Submersibles@psubs.org</a><br clear="none"> <a target="_blank" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" shape="rect">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a>
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