<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12pt"><div><span></span></div><div></div><div>I played around with a lot of techniques to do just that including having a VBT aft but was never happy with the issues this caused. First it complicates things. I am trying to make the operation of the boat dirt simple. I have no VBT, just ballast up prior to dive like a diver. The ballast control concept is stolen off the Deepworker 2000, i.e., handle with a red knob that connects to a Swagelok 3-way valve. When the handle is moved up, air is directed to BT and the boat goes up, when the handle is moved down, air is directed to soft pneumatic cylinder that strokes the vent valves (after Vance's design) and the boat goes down and when the handle is level no valve is closed. VBT function for depth keeping
is replace with vertical thruster (after the way Alec does it with Snoopy). Depending on dive objective, diver can weight up to be either slightly positive or slightly negative after BT is flooded. </div><div><br></div><div>ABS rules say no mercury which would have made it easy to move a lot weight from one point to anther. If you use a aft mounted VBT to try and rotate the boat by adding air, you also generate added buoyancy which you would have to null out by having another VBT to take on water. Also I wanted to keep the split between CB and CG as great as possible for vertical stability both in the water column and on the surface if the pilot has to get out in an emergency.</div><div><br></div><div>Bottom line is yes it would be nice to pitch forward in the water column but in the sprit of KISS and trying to keep the cost low, I have abandoned this
feature.</div><div><br><br>Cliff</div><div><br></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 class="hr" 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> hank pronk via Personal_Submersibles <personal_submersibles@psubs.org><br> <b><span style="font-weight: bold;">To:</span></b> Personal Submersibles General Discussion <personal_submersibles@psubs.org> <br> <b><span style="font-weight: bold;">Sent:</span></b> Wednesday, July 23, 2014 7:52 AM<br> <b><span style="font-weight:
bold;">Subject:</span></b> Re: [PSUBS-MAILIST] O2 regulator<br> </font> </div> <div class="y_msg_container"><br><div id="yiv5482299936"><div><div style="color: rgb(0, 0, 0); font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12pt; background-color: rgb(255, 255, 255);"><div><span>Cliff,</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>Now that new sub is neat. Just a thought, you could add a couple of VBT's on the back end of you battery pods. This would give you the opportunity to go horizontal to get up close to an object. </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>An excavator arm is always to short, a crane can never lift enough and a submarine window is never close enough :-)</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>Hank</span></div> <div class="yiv5482299936qtdSeparateBR"><br clear="none"><br clear="none"></div><div class="yiv5482299936yahoo_quoted" style="display: block;"> <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 class="qtdSeparateBR"><br><br></div><div class="yiv5482299936yqt7361766218" id="yiv5482299936yqt63477"><div dir="ltr"> <font face="Arial" size="2"> On Wednesday, July 23, 2014 8:48:15 AM, Cliff Redus via
Personal_Submersibles <personal_submersibles@psubs.org> wrote:<br clear="none"> </font> </div> <br clear="none"><br clear="none"> <div class="yiv5482299936y_msg_container"><div id="yiv5482299936"><div><div style="color: rgb(0, 0, 0); font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12pt; background-color: rgb(255, 255, 255);"><div><span></span></div><div></div><div>Last fall I was approached by some ME students looking for a senior project and mentor for their BS ME senior design project. Got the team working on a low cost, very compact (size of an apple) 24vdc 5000 lumen LED using off the shelf array and controller and packaging for 500 fsw. Team is coming along nicely but slow as hell. Should be ready for testing in a few months. They are also designing a automated test chamber controlled by a PLC. If I were not locked into this LED path, would be knocking on your
door. Thanks for the offer.</div><div><br clear="none"><br clear="none"></div><div><br clear="none"></div><div><br clear="none"></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 class="yiv5482299936yqt7076004832" id="yiv5482299936yqtfd86082"><div class="yiv5482299936hr" style="margin: 5px 0px; padding: 0px; border: 1px solid rgb(204, 204, 204); border-image: none; height: 0px; line-height: 0; font-size: 0px;"></div> <font face="Arial" size="2"> <b><span style="font-weight: bold;">From:</span></b> Hugh Fulton via Personal_Submersibles <personal_submersibles@psubs.org><br clear="none"> <b><span style="font-weight: bold;">To:</span></b> 'Personal Submersibles General Discussion' <personal_submersibles@psubs.org> <br clear="none"> <b><span style="font-weight: bold;">Sent:</span></b> Wednesday, July 23, 2014 12:56 AM<br clear="none"> <b><span style="font-weight: bold;">Subject:</span></b> Re: [PSUBS-MAILIST] O2 regulator<br clear="none"> </font> </div></div><div class="yiv5482299936yqt7076004832" id="yiv5482299936yqtfd80658"> <div class="yiv5482299936y_msg_container"><br clear="none"><div
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#yiv5482299936 </style><div><div class="yiv5482299936WordSection1"><div class="yiv5482299936MsoNormal"><span style="font-size: 11pt;">Hi Cliff,</span></div><div class="yiv5482299936MsoNormal"><span style="font-size: 11pt;">I have just done some LED’s.</span></div><div class="yiv5482299936MsoNormal"><span style="font-size: 11pt;">50 watt and 150 watt.</span></div><div class="yiv5482299936MsoNormal"><span style="font-size: 11pt;">Can supply the lens LED and controller.</span></div><div class="yiv5482299936MsoNormal"><span style="font-size: 11pt;"> </span></div><div class="yiv5482299936MsoNormal"><span style="font-size: 11pt;">Chs, Hugh</span></div><div class="yiv5482299936qtdSeparateBR"><br clear="none"><br clear="none"></div><div class="yiv5482299936yqt3514679701" id="yiv5482299936yqt69745"><div><div style="border-width: 1pt medium medium; border-style: solid none none; border-color: rgb(181, 196, 223) currentColor currentColor; padding: 3pt
0cm 0cm;"><div class="yiv5482299936MsoNormal"><b><span style="font-size: 10pt;">From:</span></b><span style="font-size: 10pt;"> Personal_Submersibles [mailto:personal_submersibles-bounces@psubs.org] <b>On Behalf Of </b>Cliff Redus via Personal_Submersibles<br clear="none"><b>Sent:</b> Wednesday, 23 July 2014 3:34 p.m.<br clear="none"><b>To:</b> Personal Submersibles General Discussion<br clear="none"><b>Subject:</b> Re: [PSUBS-MAILIST] O2 regulator</span></div></div></div><div class="yiv5482299936MsoNormal"> </div><div><div><div class="yiv5482299936MsoNormal" style="background: white;"><span style="color: black; font-family: helveticaneue;">I am working on two projects, the first is some mods to the R300. I have come to the conclusion that speed is an illusion for the mud holes of Texas. I am pulling the jet pump and drive train and ailerons and replace with four fixed MK-101's. Slower speed but
better low speed
maneuverability. Moving from 120VDC battery bank to 36VDC.</span></div></div><div><div class="yiv5482299936MsoNormal" style="background: white;"><span style="color: black; font-family: helveticaneue;"> </span></div></div><div><div class="yiv5482299936MsoNormal" style="background: white;"><span style="color: black; font-family: helveticaneue;">The new boat is a 1-atm, I person ADS designed for 500 fsw, pilot stands in a vertical position . Dry weight 2940 lbs with 30% ROB. Height 7'1", beam 6'6" draft 4'9", 200 SCF air/237 bar, 87 SCF O2/129 bar. 22" x 4" thick flat acrylic main viewport, three 8" side viewprots. Uses four MK-101 with kort nozzles, two vertical and two horizontal. Three axis joy stick. See attached pic. Battery pods low, upper pods are MBT. Uses a version of the pancake style vent valve you discussed at the last psub convention.
Life support for 72 hours. Just finished all the electrical design, working on electrical penetrators. Working on designing the exterior PLC pod. FRP cowling, 0.25" A517-70 shell. Working on housing for 24V 5000 lumen LED lights. Will use seven of these. Life support/communication gear/PLC/touchscreen/scrubber similar to R300. </span></div></div><div><div class="yiv5482299936MsoNormal" style="background: white;"><span style="color: black; font-family: helveticaneue;"> </span></div></div><div><div class="yiv5482299936MsoNormal" style="background: white;"><span style="color: black; font-family: helveticaneue;">Need to retire again to work on this.</span></div></div><div><div class="yiv5482299936MsoNormal" style="background: white;"><span style="color: black; font-family: helveticaneue;"> </span></div></div><div><div class="yiv5482299936MsoNormal" style="background: white;"><span style="color: black; font-family:
helveticaneue;"> </span></div></div><div><div class="yiv5482299936MsoNormal" style="background: white;"><span style="color: black; font-family: helveticaneue;"><br clear="none">Cliff</span></div></div><div><div class="yiv5482299936MsoNormal" style="background: white;"><span style="color: black; font-family: helveticaneue;"> </span></div></div><div><div class="yiv5482299936MsoNormal" style="background: white;"><span style="color: black; font-family: helveticaneue;"> </span></div></div><div><div><div><div class="yiv5482299936MsoNormal" style="background: white;"><b><span style="font-size: 10pt;">From:</span></b><span style="font-size: 10pt;"> via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none"><b>To:</b> <a href="mailto:personal_submersibles@psubs.org"
target="_blank" rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a> <br clear="none"><b>Sent:</b> Tuesday, July 22, 2014 9:30 PM<br clear="none"><b>Subject:</b> Re: [PSUBS-MAILIST] O2 regulator</span><span style="color: black; font-family: helveticaneue;"></span></div></div><div><div class="yiv5482299936MsoNormal" style="background: white;"><span style="color: black; font-family: helveticaneue;"> </span></div><div id="yiv5482299936"><div><div class="yiv5482299936MsoNormal" style="background: white;"><span>New boat? </span><span style="color: black; font-family: helveticaneue;"></span></div><div><div class="yiv5482299936MsoNormal" style="background: white;"><span style="color: black; font-family: helveticaneue;"> </span></div></div><div><div class="yiv5482299936MsoNormal" style="background: white; margin-bottom: 12pt;"><span style="color: black; font-family: helveticaneue;">Vance<br
clear="none"><br clear="none"></span></div><div><div class="yiv5482299936MsoNormal" style="background: white; margin-bottom: 12pt;"><span style="font-size: 10pt;">-----Original Message-----<br clear="none">From: Cliff Redus via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none">To: Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none">Sent: Tue, Jul 22, 2014 9:15 pm<br clear="none">Subject: Re: [PSUBS-MAILIST] O2 regulator</span></div><div id="yiv5482299936yqt36403"><div id="yiv5482299936AOLMsgPart_2_509bac5e-8e51-4097-bb10-621f97a76d7b"><div><div><div><div class="yiv5482299936MsoNormal"
style="background: white;"><span style="color: black; font-family: helveticaneue;">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.</span></div></div><div><div class="yiv5482299936MsoNormal" style="background: white;"><span style="color: black; font-family: helveticaneue;"> </span></div></div><div><div class="yiv5482299936MsoNormal" style="background: white;"><span style="color: black; font-family: helveticaneue;">For the new boat I am designing, I like the UV-FLux 25% sensor from CO2 meters inc. <a href="http://co2meters.com/Documentation/Datasheets/DS-CM-0201-UV-Flux.pdf" target="_blank" rel="nofollow"
shape="rect">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.</span></div></div><div><div class="yiv5482299936MsoNormal" style="background: white;"><span style="color: black; font-family: helveticaneue;"> </span></div></div><div><div class="yiv5482299936MsoNormal" style="background: white;"><span style="color: black; font-family: helveticaneue;"><a href="http://co2meters.com/Documentation/Manuals/Manual-CM-0201-UV-Flux-Oxygen.pdf" target="_blank" rel="nofollow" shape="rect">http://co2meters.com/Documentation/Manuals/Manual-CM-0201-UV-Flux-Oxygen.pdf</a> is the manual for the
sensor.</span></div></div><div><div class="yiv5482299936MsoNormal" style="background: white;"><span style="color: black; font-family: helveticaneue;"> </span></div></div><div><div class="yiv5482299936MsoNormal" style="background: white;"><span style="color: black; font-family: helveticaneue;">Cliff</span></div></div><div><div class="yiv5482299936MsoNormal" style="background: white;"><span style="color: black; font-family: helveticaneue;"> </span></div></div><div><div class="yiv5482299936MsoNormal" style="background: white;"><span style="color: black; font-family: helveticaneue;"> </span></div></div><div><div class="yiv5482299936MsoNormal" style="background: white; margin-bottom: 12pt;"><span style="color: black; font-family: helveticaneue;"><br clear="none"><br clear="none"><br clear="none"></span></div></div><div><div class="yiv5482299936MsoNormal" style="background: white;"><span style="color: black; font-family: helveticaneue;"><br
clear="none">Cliff Redus<br clear="none">Redus Engineering<br clear="none">USA mobile: 830-931-1280<br clear="none"><a href="mailto:cliffordredus@sbcglobal.com" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:cliffordredus@sbcglobal.com">cliffordredus@sbcglobal.com</a> </span></div></div><div><div class="yiv5482299936MsoNormal" style="background: white;"><span style="color: black; font-family: helveticaneue;"> </span></div></div><div><div><div><div class="yiv5482299936MsoNormal" style="background: white;"><b><span style="font-size: 10pt;">From:</span></b><span style="font-size: 10pt;"> Pete Niedermayr via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none"><b>To:</b> Personal Submersibles General Discussion <<a
href="mailto:personal_submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> <br clear="none"><b>Sent:</b> Tuesday, July 22, 2014 5:54 PM<br clear="none"><b>Subject:</b> Re: [PSUBS-MAILIST] O2 regulator</span><span style="color: black; font-family: helveticaneue;"></span></div></div><div><div class="yiv5482299936MsoNormal" style="background: white;"><span style="color: black; font-family: helveticaneue;"><br clear="none"><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" target="_blank" rel="nofollow" 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" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">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" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">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 href="http://www.co2meter.com/collections/co2-sensors/products/k-30-co2-sensor-module Has" target="_blank" rel="nofollow" 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" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:cliffordredus@sbcglobal.com">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" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none"> To: Personal<br clear="none">Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">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" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">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" target="_blank" rel="nofollow" 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<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" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">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
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