<div dir="ltr"><div>Hi Alan</div><div>Yep, my pressure transmitter is suitable for oxygen (and is ranged 0-400bar).</div><div><br></div><div>A SCUBA reg HP port usually has an orifice built-in to restrict flow in the event of hose failure.  But with even 100bar behind it, the tank will still empty in a matter of minutes - pretty significant.  Having the prolonged restriction of a long skinny tube will help a bit, but a total failure would still put out a lot of gas.</div><div><br></div><div>Cheers,</div><div>Steve</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Oct 31, 2016 at 12:04 PM, Alan James via Personal_Submersibles <span dir="ltr"><<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div style="color:rgb(0,0,0);font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px;background-color:rgb(255,255,255)"><div id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_3883"><span>Thanks Emile & Steve.</span></div><div id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_3998"><span>I may combine both suggestions.</span></div><div id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4000"><span id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_3999">I am wanting to put my penetrations through a removeable plate</span></div><div id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4030" dir="ltr"><span id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4029">a la Deep Worker. It will be behind me in my 1 person submersible;</span></div><div id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4066" dir="ltr"><span id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4103">so a pressure transmitter with wires coming from it rather than a gauge</span></div><div id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4072" dir="ltr"><span id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4073">looks like the right option.</span></div><div id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4102" dir="ltr"><span id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4101">I like the idea of the 1/8th tube. I couldn't find a flow rate anywhere</span></div><div id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4199" dir="ltr"><span id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4198">for a 1st stage hp port. May have to flow it in to a plastic bag & get an</span></div><div id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4185" dir="ltr"><span id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4186">estimate, to see if a failure would be an issue anyway.</span></div><div id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4184" dir="ltr"><span id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4197">   Steve, are those pressure transmitters suitable for oxygen?</span></div><div id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4217" dir="ltr"><span id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4230">Cheers Alan</span></div><div id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4047" dir="ltr"><span></span> </div><div class="m_-1543851585208408885qtdSeparateBR" id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_3885"><br><br></div><div class="m_-1543851585208408885yahoo_quoted" id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_3947" style="display:block">  <div id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_3946" style="font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px"> <div id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_3945" style="font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px"> <div id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_3944" dir="ltr"> <font id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_3943" face="Arial" size="2"> <hr size="1" id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4067"> <b id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4069"><span id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4068" style="font-weight:bold">From:</span></b> Stephen Fordyce via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.<wbr>org</a>><br> <b id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4071"><span id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4070" style="font-weight:bold">To:</span></b> Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.<wbr>org</a>> <br> <b><span style="font-weight:bold">Sent:</span></b> Monday, October 31, 2016 12:34 PM<br> <b><span style="font-weight:bold">Subject:</span></b> Re: [PSUBS-MAILIST] Electronics contents gauge<br> </font> </div> <div class="m_-1543851585208408885y_msg_container" id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_3948"><br><div id="m_-1543851585208408885yiv1914004004"><div id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_3951"><span><div id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_3950" dir="ltr"><div id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4025">Hi Alan,</div><div id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4024">I have pressure transmitters (similar to many commonly used in industry) that could probably be adapted for that - see attached photos.  You could replace the end section with a small penetrator/cable gland plate.  It needs a power supply of 6-30VDC and outputs 0.5-4.5V or 4-20mA (both linear).  They are NPT so you'd need an adaptor for the SCUBA HP port - but a 1/4" Swagelok thread will fit.</div><div id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4235"><br clear="none"></div><div id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4168">I imagine you're worried about leaks of HP inside, and maybe cost as well.  Something you may not have thought of is running 1/8" SS tube.  It's soft enough to bend by hand (more like stiff solid-core electrical cable than 1/4" tube) and can be run in a bundle with cables.  Also available in very small inside diameters so flow is greatly restricted.  I've had good success using it for remote gauge lines.</div><div id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4206"><br clear="none"></div><div id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4149">I also have digital HP oxygen pressure gauges if you ever need one of those :).</div><div id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4172"><br clear="none"></div><div id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_3949">Shoot me an email at <a id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4173" href="mailto:Stephen.fordyce@tfmengineering.com.au" target="_blank" rel="nofollow" shape="rect">Stephen.fordyce@<wbr>tfmengineering.com.au</a> if you're interested in one - list price is AU$198.</div><div id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_3952"><br clear="none"></div><div id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_3953">Cheers,</div><div>Steve</div><div id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4164">(TFM Engineering Australia)</div></div></span><div class="m_-1543851585208408885yiv1914004004gmail_extra" id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_3954"><br clear="none"><div class="m_-1543851585208408885yiv1914004004gmail_quote" id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_3959"><span>On Mon, Oct 31, 2016 at 7:19 AM, emile via Personal_Submersibles <span dir="ltr"><<a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect">personal_submersibles@psubs.<wbr>org</a>></span> wrote:<br clear="none"></span><blockquote class="m_-1543851585208408885yiv1914004004gmail_quote" id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_3958" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid"><div class="m_-1543851585208408885yiv1914004004yqt6397216203" id="m_-1543851585208408885yiv1914004004yqt79655"><div id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_3957" lang="NL"><div class="m_-1543851585208408885yiv1914004004m_-5302561528609100023WordSection1" id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_3956"><span><div class="m_-1543851585208408885yiv1914004004MsoNormal" id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_3962"><span id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4236" lang="EN-US" style="color:rgb(31,73,125)">The scuba pressure sensors are wireless. Most scuba divers don’t want it as it is unreliable.<u></u><u></u></span></div><div class="m_-1543851585208408885yiv1914004004MsoNormal" id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_3955"><span lang="EN-US" style="color:rgb(31,73,125)"><u></u> <u></u></span></div><div class="m_-1543851585208408885yiv1914004004MsoNormal" id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_3961"><span id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_3960" lang="EN-US" style="color:rgb(31,73,125)">Best would be to screw a industrial pressure sensor (with ¼ “thread or so) into the penetrator plate and attach a HP line on the outside.<u></u><u></u></span></div><div class="m_-1543851585208408885yiv1914004004MsoNormal"><span lang="EN-US" style="color:rgb(31,73,125)"><u></u> <u></u></span></div><div class="m_-1543851585208408885yiv1914004004MsoNormal" id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4163"><span lang="EN-US" style="color:rgb(31,73,125)"><u></u> <u></u></span></div><div class="m_-1543851585208408885yiv1914004004MsoNormal" id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4161"><span id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4162" lang="EN-US" style="color:rgb(31,73,125)">Br, Emile<u></u><u></u></span></div><div class="m_-1543851585208408885yiv1914004004MsoNormal"><span lang="EN-US" style="color:rgb(31,73,125)"><u></u> <u></u></span></div></span><div id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4153"><div id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4152" 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="m_-1543851585208408885yiv1914004004MsoNormal" id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4151"><b><span>Van:</span></b><span id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4150"> Personal_Submersibles [mailto:<a href="mailto:personal_submersibles-bounces@psubs.org" target="_blank" rel="nofollow" shape="rect">personal_submersibles- bounces@psubs.org</a>] <b>Namens </b>Alan James via Personal_Submersibles<span><br clear="none"><b>Verzonden:</b> zondag 30 oktober 2016 21:02<br clear="none"><b>Aan:</b> Personal Submersibles General Discussion<br clear="none"><b>Onderwerp:</b> [PSUBS-MAILIST] Electronics contents gauge<u></u><u></u></span></span></div></div></div><span><div id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4157"><div class="m_-1543851585208408885yiv1914004004h5" id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4156"><div class="m_-1543851585208408885yiv1914004004MsoNormal"><u></u> <u></u></div><div id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4155"><div><div class="m_-1543851585208408885yiv1914004004MsoNormal" style="background:white"><span style="color:black">Is there a suitable electronic scuba tank contents gauge out there?<u></u><u></u></span></div></div><div id="m_-1543851585208408885yiv1914004004m_-5302561528609100023yui_3_16_0_ym19_1_1477856450518_3670"><div class="m_-1543851585208408885yiv1914004004MsoNormal" style="background:white"><span style="color:black">I am after something that plugs in to the high pressure port of the<u></u><u></u></span></div></div><div id="m_-1543851585208408885yiv1914004004m_-5302561528609100023yui_3_16_0_ym19_1_1477856450518_3669"><div class="m_-1543851585208408885yiv1914004004MsoNormal" style="background:white"><span style="color:black">1st stage regulator & has wires off it that I can run through a through<u></u><u></u></span></div></div><div id="m_-1543851585208408885yiv1914004004m_-5302561528609100023yui_3_16_0_ym19_1_1477856450518_3668"><div class="m_-1543851585208408885yiv1914004004MsoNormal" style="background:white"><span style="color:black">hull so I can display the tank contents pressure on a screen.<u></u><u></u></span></div></div><div id="m_-1543851585208408885yiv1914004004m_-5302561528609100023yui_3_16_0_ym19_1_1477856450518_3667"><div class="m_-1543851585208408885yiv1914004004MsoNormal" id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4238" style="background:white"><span id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4237" style="color:black">Trying to avoid bringing high pressure in to the hull.<u></u><u></u></span></div></div><div id="m_-1543851585208408885yiv1914004004m_-5302561528609100023yui_3_16_0_ym19_1_1477856450518_3641"><div class="m_-1543851585208408885yiv1914004004MsoNormal" style="background:white"><span style="color:black">An alternative may be to run a high pressure line to a through<u></u><u></u></span></div></div><div id="m_-1543851585208408885yiv1914004004m_-5302561528609100023yui_3_16_0_ym19_1_1477856450518_3642"><div class="m_-1543851585208408885yiv1914004004MsoNormal" id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4159" style="background:white"><span id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4158" style="color:black">hull & have an electronic pressure gauge threaded in to this from the <u></u><u></u></span></div></div><div id="m_-1543851585208408885yiv1914004004m_-5302561528609100023yui_3_16_0_ym19_1_1477856450518_3666"><div class="m_-1543851585208408885yiv1914004004MsoNormal" style="background:white"><span style="color:black">inside of the hull. However with the second method, I wouldn't have<u></u><u></u></span></div></div><div id="m_-1543851585208408885yiv1914004004m_-5302561528609100023yui_3_16_0_ym19_1_1477856450518_3707"><div class="m_-1543851585208408885yiv1914004004MsoNormal" style="background:white"><span style="color:black">a shut off valve if the pressure gauge failed some how.<u></u><u></u></span></div></div><div id="m_-1543851585208408885yiv1914004004m_-5302561528609100023yui_3_16_0_ym19_1_1477856450518_3706"><div class="m_-1543851585208408885yiv1914004004MsoNormal" style="background:white"><span style="color:black">Alan<u></u><u></u></span></div></div><div id="m_-1543851585208408885yiv1914004004m_-5302561528609100023yui_3_16_0_ym19_1_1477856450518_3665"><div class="m_-1543851585208408885yiv1914004004MsoNormal" id="m_-1543851585208408885yui_3_16_0_ym19_1_1477869252690_4154" style="background:white"><span style="color:black"><br clear="none"> <u></u><u></u></span></div></div></div></div></div></span></div></div></div><span><br clear="none">______________________________ _________________<br clear="none">
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