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<p class="MsoNormal"><span style="color:#1F497D">Our existing fab at Draper uses a Honeywell/Vertex system, paper tape. Light tree that trips an evacuation at the Lower limit and a warning at the higher limit. The paper tape systems works just fine, costly
because the paper tapes get pricy and need to be changed out. The system was 100% uptime and we never had any false alarms. Monitoring, Silane, Mineral Acids, NH3, Hydrogen.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">In our new Microfab we are using MSA Trigard, 3 sensors per alarm pack, this pack goes back to a main panel. The panel sets the alarm lights and alerts the safety group. The sensors are easy to change they are
cylindrical sensor and 3 sensors run off of 1 pump.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">TGMS is a very sensitive topic at most places, I suggest that you purchase a turnkey system from a vendor in your area. The systems are very sophisticated and the sensor choice is the most important part. Finally
the system integration gets complicated with all the different controllers, sensors, pumps and alarm systems. Since this is a life safety issue it is best left to the experts.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Our turnkey system installed was $250K pricey yes but a solid solution. That gives me 27 points split between, Ammonia, hydrides, mineral acids, Silane and Fluorine.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Rick<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Rick Morrison<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Senior Member Technical Staff <o:p>
</o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Group Leader Microfabrication Operations<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Draper Laboratory<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">555 Technology Square<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Cambridge, MA 02139<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">W 617-258-3420<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">C 508-930-3461<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> labnetwork-bounces@mtl.mit.edu [mailto:labnetwork-bounces@mtl.mit.edu]
<b>On Behalf Of </b>Bowser, Jerry<br>
<b>Sent:</b> Wednesday, August 08, 2012 1:14 PM<br>
<b>To:</b> 'labnetwork@mtl.mit.edu'<br>
<b>Subject:</b> [labnetwork] Toxic Gas Monitoring Systems<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif"">Hello All,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif"">I wanted to survey the group for information regarding the type and brands of toxic gas monitoring control systems in use.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif"">Here at the CNST, we use various gas sensors (about 55) connected to a custom PLC based system that is just about at capacity. If a gas is detected, the system shuts down gas cabinets, sounds
alarms, and alerts our fire department. The major shortfall of the system is that the detection level can be read at the sensor in the detection zone but is not displayed at the control interface.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif"">Before we decide on upgrading or replacing our control system, I thought I would see what others are currently using. Thanks for your input.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif"">Jerry<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif"">*******************************************<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif"">Jerry Bowser<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif"">NanoFab Operations Group<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif"">Center for Nanoscale Science and Technology<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif"">National Institute of Standards and Technology<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif"">Phone: (301) 975-8187<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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