<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yui_3_16_0_1_1442807062351_3402"><span id="yui_3_16_0_1_1442807062351_3405">Hi Alec,</span></div><div id="yui_3_16_0_1_1442807062351_3400"><span id="yui_3_16_0_1_1442807062351_3401">I took photos of those submarines last year, but nothing clear enough to zoom </span></div><div id="yui_3_16_0_1_1442807062351_3400"><span id="yui_3_16_0_1_1442807062351_3424">in on the gauges. </span>They look like scuba gauges that have been peeled out of their</div><div dir="ltr" id="yui_3_16_0_1_1442807062351_3397"><span id="yui_3_16_0_1_1442807062351_3439">rubber housing. Very friendly people who I am sure would comfirm what they were, if</span></div><div dir="ltr" id="yui_3_16_0_1_1442807062351_3397"><span id="yui_3_16_0_1_1442807062351_3620">you emailed them. David Columbo has visited them on Oahu & Vance knows them.</span></div><div dir="ltr" id="yui_3_16_0_1_1442807062351_3397"><span>(of course)</span></div><div dir="ltr" id="yui_3_16_0_1_1442807062351_3397"><span>Cheers Alan</span></div><div dir="ltr" id="yui_3_16_0_1_1442807062351_3397"><span><br></span></div><br> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1442807062351_3392"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1442807062351_3391"> <div dir="ltr" id="yui_3_16_0_1_1442807062351_3395"> <hr size="1" id="yui_3_16_0_1_1442807062351_3479"> <font size="2" face="Arial" id="yui_3_16_0_1_1442807062351_3396"> <b><span style="font-weight:bold;">From:</span></b> Alec Smyth 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> Monday, September 21, 2015 3:03 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> [PSUBS-MAILIST] Gauge for outside viewport?<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_1_1442807062351_3390"><br><div id="yiv0214167079"><div dir="ltr" id="yui_3_16_0_1_1442807062351_3389">I have an interesting thing to think about and wondered if any of the PSUBS brain trust might have a suggestion.<div id="yui_3_16_0_1_1442807062351_3394"><br></div><div id="yui_3_16_0_1_1442807062351_3393">One of the simplifications on my new sub is that all HP air lines are external, aside from the BIBS (which is normally shut off anyway). Thus, I'm looking for a 3,000-4,000 psi gauge to mount outside a viewport, like in the Pisces photo that I'll paste below. In case my paste doesn't come through, it is the one at the top of the following article: <a rel="nofollow" target="_blank" href="http://www.nytimes.com/2015/09/15/science/piloted-deep-sea-research-is-bottoming-out.html?_r=1" id="yui_3_16_0_1_1442807062351_3480">http://www.nytimes.com/2015/09/15/science/piloted-deep-sea-research-is-bottoming-out.html?_r=1</a></div><div id="yui_3_16_0_1_1442807062351_3481"><br></div><div id="yui_3_16_0_1_1442807062351_3482">The first thing that came to mind was to use a SCUBA submersible pressure gauge, but the problem is these are normally 1 atm dry enclosures of limited depth rating. There is generally little information posted about how deep they'll go, but what I did find was mentioned 260 feet for the plastic ones and 490 feet for the brass variety. This is a 1,000 foot sub.</div><div id="yui_3_16_0_1_1442807062351_3483"><br></div><div id="yui_3_16_0_1_1442807062351_3388">The second idea was to use oil filled gauges intended for above-water use. But these generally have considerable bubbles in the oil, are not very good at keeping the oil inside, and have other hardware not intended to live long in sea water.</div><div id="yui_3_16_0_1_1442807062351_3484"><br></div><div id="yui_3_16_0_1_1442807062351_3485">Any suggestions would be most welcome!<br></div><div id="yui_3_16_0_1_1442807062351_3486"><br></div><div id="yui_3_16_0_1_1442807062351_3487"><br></div><div id="yui_3_16_0_1_1442807062351_3488">Thanks,</div><div id="yui_3_16_0_1_1442807062351_3637"><br>Alec </div><div id="yui_3_16_0_1_1442807062351_3638"><br></div><div id="yui_3_16_0_1_1442807062351_3640"><img alt="Inline image 1" width="429" height="432" data-id="622d8c3a-37ee-42d8-d833-ea4df6909255" id="yui_3_16_0_1_1442807062351_3639" class=""><br></div></div></div><br>_______________________________________________<br>Personal_Submersibles mailing list<br><a ymailto="mailto:Personal_Submersibles@psubs.org" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br><br><br></div> </div> </div> </div></body></html>