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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'>Bob / Mac,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'>Zellweger was the original manufacturer of the Lifeline II electrochemical cells that we just had to replace. They were acquired by Honeywell shortly after our install (2004 or so). DOD Technologies is a different company representing product from a Japanese manufacturer. Our current experience with Honeywell matches Bob’s description.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'><o:p> </o:p></span></p><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'>Dan<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'>Dan Woodie<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'>Lab Use Manager<o:p></o:p></span></p></div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'> labnetwork-bounces@mtl.mit.edu [mailto:labnetwork-bounces@mtl.mit.edu] <b>On Behalf Of </b>Robert M. Hamilton<br><b>Sent:</b> Monday, January 31, 2011 1:33 PM<br><b>To:</b> labnetwork@mtl.mit.edu<br><b>Subject:</b> Re: [labnetwork] FW: Gas Monitor<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>At UC Bekeley we have had experience with Zellweger tape-based systems. We chose their system because a tape-based system does not require the same level of annual service to verify and calibrate each individual gas detector as chemical sensors.<br><br>Having said this, we did not choose Zellweger for our new NanoLab. I found them slow in their response, expensive and not willing to support legacy systems. I believe Honeywell acquired or reps. Zellweger but have not had recent interactions with them. <br><br>Bob Hamilton <br><br><br><o:p></o:p></p><pre>-- <o:p></o:p></pre><pre>Robert M. Hamilton<o:p></o:p></pre><pre>University of CA at Berkeley<o:p></o:p></pre><pre>Rm 520 Sutardja Dai Hall<o:p></o:p></pre><pre>Berkeley, CA 94720-1754<o:p></o:p></pre><pre><a href="mailto:bob@eecs.berkeley.edu">bob@eecs.berkeley.edu</a><o:p></o:p></pre><pre>(e-mail preferred)<o:p></o:p></pre><pre>510-809-8600<o:p></o:p></pre><pre>510-325-7557 (My personal cell)<o:p></o:p></pre><p class=MsoNormal><br><br>On 1/31/2011 7:49 AM, Mac Hathaway wrote: <o:p></o:p></p><p class=MsoNormal>Hey there, Floyd,<br><br>This is Mac Hathaway, from Harvard Center for Nanoscale Systems. At CNS, We use MST and Midas sensors (Honeywell), which both seem to work pretty well. The MST has a sensor cartridge right at the monitoring point, and the Midas can do remote sensing, i.e. the sensor can be some distance from the monitored point, drawing a continuous gas sample via poly or teflon tube, up to ~100 ft away depending on the gas.<br><br>There is another group that is breaking in, some guys from Zellweger (used to be MDA, old makers of Chemcassettes). They are called DOD Technologies.<br><br>Our sensor guys, EERC out of Rochester, NY are quite good, and would happy to help you spec out your new sensors, or even help you put a new system together. They helped us with our initial setup, and are currently doing the bump tests several times a year.<br><br>Mac Hathaway<br>Harvard CNS<br><br><br><br><o:p></o:p></p><pre><o:p> </o:p></pre><pre><o:p> </o:p></pre><pre>_______________________________________________<o:p></o:p></pre><pre>labnetwork mailing list<o:p></o:p></pre><pre><a href="mailto:labnetwork@mtl.mit.edu">labnetwork@mtl.mit.edu</a><o:p></o:p></pre><pre><a href="https://www-mtl.mit.edu/mailman/listinfo.cgi/labnetwork">https://www-mtl.mit.edu/mailman/listinfo.cgi/labnetwork</a><o:p></o:p></pre><p class=MsoNormal><br><br><br><o:p></o:p></p><pre>-- <o:p></o:p></pre><pre>Robert M. Hamilton<o:p></o:p></pre><pre>University of CA at Berkeley<o:p></o:p></pre><pre>Rm 520 Sutardja Dai Hall<o:p></o:p></pre><pre>Berkeley, CA 94720-1754<o:p></o:p></pre><pre><a href="mailto:bob@eecs.berkeley.edu">bob@eecs.berkeley.edu</a><o:p></o:p></pre><pre>(e-mail preferred)<o:p></o:p></pre><pre>510-809-8600<o:p></o:p></pre><pre>510-325-7557 (My personal cell)<o:p></o:p></pre></div></body></html>