<div dir="auto">Another option would be to install a hygrometer downstream and measure the dewpoint. If the purifier has a bypass manifold you can see if the dewpoint gets any worse when the purifier is bypassed.</div><div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Thu, Feb 13, 2025 at 2:28 PM Kyle Keenan <<a href="mailto:kckeenan@seas.upenn.edu">kckeenan@seas.upenn.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;padding-left:1ex;border-left-color:rgb(204,204,204)"><div dir="ltr"><div>Hi Brian,</div><div><br></div><div>Thanks for the suggestion. Unfortunately, calculating the flow accurately is virtually impossible. We share the LN2 supply with the entire building, so even if we knew the total usage for the building, we'd have no way of knowing how much of that is ours.</div><div><br></div><div>Best,</div><div>Kyle<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Feb 13, 2025 at 2:09 PM Brian Little <<a href="mailto:bdlittl2@ncsu.edu" target="_blank">bdlittl2@ncsu.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;padding-left:1ex;border-left-color:rgb(204,204,204)"><div><div><span style="font-family:-apple-system,helveticaneue;font-size:16px;font-style:normal;font-weight:400;letter-spacing:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none;float:none;display:inline;background-color:rgba(0,0,0,0);border-color:rgb(0,0,0);color:rgb(0,0,0)">Hi Kyle,</span><div dir="auto" style="font-family:-apple-system,helveticaneue;font-size:16px;font-style:normal;font-weight:400;letter-spacing:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none;background-color:rgba(0,0,0,0);border-color:rgb(0,0,0);color:rgb(0,0,0)">I would recommend checking with your vendor or any other purifier vendor. They have spreadsheets that they can type the purity and flow into that will estimate an approximate lifetime for a given bed size and material.</div><div dir="auto" style="font-family:-apple-system,helveticaneue;font-size:16px;font-style:normal;font-weight:400;letter-spacing:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none;background-color:rgba(0,0,0,0);border-color:rgb(0,0,0);color:rgb(0,0,0)">Brian </div></div><br></div><div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Feb 13, 2025 at 1:28 PM Kyle Keenan <<a href="mailto:kckeenan@seas.upenn.edu" target="_blank">kckeenan@seas.upenn.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;padding-left:1ex;border-left-color:rgb(204,204,204)"><div dir="ltr"><div>Hello All,</div><div><br></div><div>Our cleanroom has been in operation for 11 years and, for high purity N2, we use local purifiers. Given their age, I'm starting to wonder if/when they might need to be replaced. I've looked into it, and doing so would be quite costly. I know there are a ton of variables at play, but generally speaking, for an 11,000 sq/ft facility that uses UPN2 on, perhaps, 15-20 pieces of research equipment and for N2 guns at ~15 wet benches, what would be your expectation? Is this something we even need to worry about? <br></div><div><br></div><div>I'd be interested to read your thoughts.<br clear="all"></div><div><br></div><div>Best,</div></div></blockquote></div></div></blockquote></div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;padding-left:1ex;border-left-color:rgb(204,204,204)"><div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;padding-left:1ex;border-left-color:rgb(204,204,204)"><div dir="ltr"><div><br></div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div>Kyle Keenan</div><div><br></div><div>Senior Manager - Laboratory Operations<br></div><div>Quattrone Nanofabrication Facility</div><div>University of Pennsylvania</div><div>P: 215-898-7560</div><div>F: 215-573-4925<br></div></div></div></div>
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</blockquote></div><div><br clear="all"></div><br><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div>Kyle Keenan</div><div><br></div><div>Senior Manager - Laboratory Operations<br></div><div>Quattrone Nanofabrication Facility</div><div>University of Pennsylvania</div><div>P: 215-898-7560</div><div>F: 215-573-4925<br></div></div></div>
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