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Hello Travis,</div>
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We have a Leica CPD. Users run about 12-24 cycles per recipe, and about 30 recipes per 2 months. We have a dual stage pressure regulator on the cylinders to monitor the amount of CO2 in the tank. The cylinders arrive with about 820 psi and I replace them when
they get to 795 psi. </div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> labnetwork <labnetwork-bounces@mtl.mit.edu> on behalf of Gila,Brent P <bgila@ufl.edu><br>
<b>Sent:</b> Tuesday, February 10, 2026 1:03 PM<br>
<b>To:</b> labnetwork@mtl.mit.edu <labnetwork@mtl.mit.edu><br>
<b>Subject:</b> Re: [labnetwork] CPD CO2 Cylinder Usage</font>
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<div>Hi Travis,<br>
<br>
We have a scale for our CO2 cylinder and track the weight with CPD use. With our system, we get about 5 CPD runs before the cylinder has to be changed. These 5 runs will not empty the cylinder completely, so we attach the nearly empty cylinder to a Sno-Gun
to use up the rest of the CO2.<br>
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Best Regards,<br>
Brent
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<div class="x_moz-cite-prefix">On 2/10/2026 10:48 AM, Travis Venables wrote:<br>
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<div><span style="font-size:9.0pt; font-family:"Arial",sans-serif; color:#FA4616"><b>[External Email]</b></span>
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<div>Hello everyone,</div>
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<div>Curious how other labs are using Co2 cylinders on their CPD systems. How much CO2 do you use before replacing the cylinder? How do you monitor CO2 usage?</div>
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<div>Thanks!</div>
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<span class="x_gmail_signature_prefix">-- </span><br>
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<div dir="ltr">Travis Venables
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<div>Lead Cleanroom Equipment Engineer</div>
<div>Quattrone Nanofabrication Facility</div>
<div>University of Pennsylvania</div>
<div><a href="https://urldefense.com/v3/__https://www.nano.upenn.edu/__;!!DZ3fjg!_JdqfToy6jIDzZEX6JPOIxruBVGp86xsSzFknKKf9iiCYmACYCb5iEmjOpoZJFJ_eZpJfx5tYSOkLI14$" originalsrc="https://www.nano.upenn.edu/" target="_blank">https://www.nano.upenn.edu</a></div>
<div>P: 215-898-1787</div>
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