<html><head></head><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:16px"><div id="yui_3_16_0_ym19_1_1520854769559_13376"><span></span></div><div id="yui_3_16_0_ym19_1_1520854769559_13376" dir="ltr"><span id="yui_3_16_0_ym19_1_1520854769559_13433">It depends on the accuracy you want. I looked at the data sheet and the accuracy of the bluerobotic sensor is +/- 2 bar, almost 20 meters or 65 feet.</span></div><div id="yui_3_16_0_ym19_1_1520854769559_13376" dir="ltr"><span><br></span></div><div id="yui_3_16_0_ym19_1_1520854769559_13376" dir="ltr"><span id="yui_3_16_0_ym19_1_1520854769559_14904">SSI technologies makes a 300psi sensor with 0.5% accuracy, about +/- 3.5 feet. They are available from Digikey for $95. I have been prototyping with these but may turn to Honeywell for actual diving.</span></div><div id="yui_3_16_0_ym19_1_1520854769559_13376" dir="ltr"><span><br></span></div><div id="yui_3_16_0_ym19_1_1520854769559_13376" dir="ltr"><span id="yui_3_16_0_ym19_1_1520854769559_16184">Honeywell has the best specifications to produce actual depth accuracy but are more expensive.</span></div><div id="yui_3_16_0_ym19_1_1520854769559_13376" dir="ltr"><span><br></span></div><div id="yui_3_16_0_ym19_1_1520854769559_13376" dir="ltr"><span id="yui_3_16_0_ym19_1_1520854769559_16294">Bottom line is that accuracy costs money. Keep in mind that a given sensor accuracy and subsequent depth calculation accuracy changes based upon the overall range of the sensor chosen. For example, a 1000psi sensor with 0.5% accuracy will result in +/- 12 feet depth accuracy. However, note that the 300psi sensor with the same 0.5% accuracy will reduce the overall depth accuracy to +/- 3.5 feet. So choose a sensor that is as close as possible to the maximum depth you intend to dive, then get as accurate a sensor as you can afford.</span></div><div id="yui_3_16_0_ym19_1_1520854769559_13376" dir="ltr"><span><br></span></div><div id="yui_3_16_0_ym19_1_1520854769559_13376" dir="ltr"><span>Jon</span></div><div class="qtdSeparateBR" id="yui_3_16_0_ym19_1_1520854769559_13377"><br><br></div><div class="yahoo_quoted" id="yui_3_16_0_ym19_1_1520854769559_13464" style="display: block;"> <div style="font-family: times new roman, new york, times, serif; font-size: 16px;" id="yui_3_16_0_ym19_1_1520854769559_13463"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_ym19_1_1520854769559_13462"> <div dir="ltr" id="yui_3_16_0_ym19_1_1520854769559_13461"> <font size="2" face="Arial" id="yui_3_16_0_ym19_1_1520854769559_13460"> <hr size="1" id="yui_3_16_0_ym19_1_1520854769559_13459"> <b><span style="font-weight:bold;">From:</span></b> Sean T. Stevenson via Personal_Submersibles <personal_submersibles@psubs.org><br> <b><span style="font-weight: bold;">To:</span></b> personal_submersibles@psubs.org <br> <b><span style="font-weight: bold;">Sent:</span></b> Sunday, March 11, 2018 11:38 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [PSUBS-MAILIST] Pressure/depth sensor for ROV project<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_ym19_1_1520854769559_13479"><br><div id="yiv6278862700"><div id="yui_3_16_0_ym19_1_1520854769559_13478">Not sure what your budget is, but I almost exclusively use Honeywell FP2000 series sensors. Price will depend on options. <br clear="none"><br clear="none">Sean<br clear="none"><br clear="none"><br clear="none"><br clear="none"><br clear="none"><br clear="none">-------- Original Message --------<br clear="none">On Mar 11, 2018, 16:37, Ludwig Johanning via Personal_Submersibles < personal_submersibles@psubs.org> wrote:<blockquote class="yiv6278862700protonmail_quote"><br clear="none"></blockquote></div><div class="yiv6278862700yqt4140448545" id="yiv6278862700yqt80220"><div><div dir="ltr">What are you guys using for a pressure/depth sensors on your subs? <br clear="none"><br clear="none">I'm looking for a pressure/depth sensor good for at least 100 meters for a ROV project at my university. I have found a sensor which is good for 100 meters on BlueRobotics but would like to see what you guys are using first. <br clear="none"><br clear="none">Thanks,<div>Ludwig </div><div><br clear="none"></div></div>
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