<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;">Hi Alex, <div><br></div><div>We use Setra 5000 series (remote spec5301SM) in our cleanroom. There are 7 particle counters in the cleanroom connecting to our RAHUs. They are taking samples every half an hour. If the particle counts are over specs, the particle counter will drive the RAHU unit working harder. So far, the whole system is working pretty well. </div><div><br></div><div><br></div><div>Best,</div><div>Jing <br id="lineBreakAtBeginningOfMessage"><div>
<meta charset="UTF-8"><div>---------------------------------------<br>Jing Guo Ph.D.<br>Cleanroom Manager/Research Scientist<br>SEA Cleanroom (SST 017)<br>Rice University<br>Houston, TX <br>jeanne.guo@rice.edu<br>713-348-8227</div>
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<div><br><blockquote type="cite"><div>On Mar 23, 2026, at 3:21 PM, Alex Dixon <agdixon@mines.edu> wrote:</div><br class="Apple-interchange-newline"><div><meta charset="UTF-8"><div class="elementToProof" style="font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt;">Hi Everyone, I was wondering what people use for particle measurement systems in their cleanrooms? We are trying to add active particle monitoring to our cleanroom facilities. I was looking at the lasair pro from "Particle Measuring Systems"<span class="Apple-converted-space"> </span><a href="https://www.pmeasuring.com/">https://www.pmeasuring.com/</a> but university procurement is asking me to put together some other options. </div><div class="elementToProof" style="font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt;"><br></div><div class="elementToProof" style="font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt;">-Alex</div><div class="elementToProof" id="Signature" style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><div class="elementToProof" style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt;"><br></div><div class="elementToProof" style="font-family: "Segoe UI", "Segoe UI Web (West European)", "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, "Helvetica Neue", sans-serif; font-size: 14px; color: rgb(33, 33, 33);"><span style="background-color: rgb(255, 255, 255);">__________________________________________________________</span></div><div class="elementToProof" style="font-family: "Segoe UI", "Segoe UI Web (West European)", "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, "Helvetica Neue", sans-serif; font-size: 14px; color: rgb(33, 33, 33);"><span style="background-color: rgb(255, 255, 255);"><br></span></div><div class="elementToProof" style="font-family: "Segoe UI", "Segoe UI Web (West European)", "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, "Helvetica Neue", sans-serif; font-size: 14px; color: rgb(33, 33, 33);"><span style="background-color: rgb(255, 255, 255);"><br></span></div><div class="elementToProof" style="font-family: "Segoe UI", "Segoe UI Web (West European)", "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, "Helvetica Neue", sans-serif; font-size: 14px; color: rgb(33, 33, 33);"><span style="background-color: rgb(255, 255, 255);">Alex Dixon, Ph.D. (He/Him)</span></div><div class="elementToProof" style="direction: ltr; text-align: left; background-color: rgb(255, 255, 255); margin: 0px; font-family: "Segoe UI", "Segoe UI Web (West European)", "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, "Helvetica Neue", sans-serif; font-size: 14px; color: rgb(33, 33, 33);">Lab Manager</div><div class="elementToProof" style="direction: ltr; text-align: left; background-color: rgb(255, 255, 255); margin: 0px; font-family: "Segoe UI", "Segoe UI Web (West European)", "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, "Helvetica Neue", sans-serif; font-size: 14px; color: rgb(33, 33, 33);">Nanofabrication and Thin Film Deposition</div><div class="elementToProof" style="direction: ltr; text-align: left; background-color: rgb(255, 255, 255); margin: 0px; font-family: "Segoe UI", "Segoe UI Web (West European)", "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, "Helvetica Neue", sans-serif; font-size: 14px; color: rgb(33, 33, 33);"><span style="background-color: rgb(255, 255, 255);">Shared Instrument Facility </span></div><div class="elementToProof" style="direction: ltr; text-align: left; background-color: rgb(255, 255, 255); margin: 0px; font-family: "Segoe UI", "Segoe UI Web (West European)", "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, "Helvetica Neue", sans-serif; font-size: 14px; color: rgb(33, 33, 33);">Colorado School of Mines</div><div class="elementToProof" style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt;"><br></div></div><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;">_______________________________________________</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;">labnetwork mailing list</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><a href="mailto:labnetwork@mtl.mit.edu" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;">labnetwork@mtl.mit.edu</a><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><a href="https://mtl.mit.edu/mailman/listinfo.cgi/labnetwork" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;">https://mtl.mit.edu/mailman/listinfo.cgi/labnetwork</a></div></blockquote></div><br></div></body></html>