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</o:shapelayout></xml><![endif]--></head><body lang=EN-AU link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>Hi Jerry,<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'>At our facility we have gas monitoring using sensors from Bionics (Cl2, BCl3, SiH4, NH3, flammables). All sensors are monitored by a home built monitoring cabinet based on a quite flexible software that we kept adapting to meet our needs. All sensors have two levels of alarm: <o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='color:#1F497D'><span style='mso-list:Ignore'>1-<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='color:#1F497D'>Alarm 1: just give a warning at the local level (monitoring cabinet)<o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='color:#1F497D'><span style='mso-list:Ignore'>2-<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='color:#1F497D'>Alarm 2: here we differentiate between sensors in open area towards sensors in exhaust ducting. The open lab sensors will trigger a general alarm: sirens, shutting down all gases, evacuation and alert fire Dept; while the exhaust detectors will initiate shutting down the corresponding gas and the system using it, shutting the exhaust fan plus a local alarm at the monitoring cabinet level/lab. <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'>Before taking my actual position in Australia I worked at Technical University Eindhoven where an 800m2 clean room was built in 2000-2002 with also Bionics sensors used to monitor gases like AsH3, PH3, SiH4, NH3, Cl2, flammables. Bionics did deliver a complete system with the interfacing computer that controls all sensors. <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'>We get the sensors calibrated twice by representatives of Bionics in Australia.<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'>Kind regards,<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Fouad Karouta<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'>Facility Manager ANFF ACT Node<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Research School of Physics and Engineering<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Australian National University<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>ACT 0200, Canberra, Australia<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Tel: + 61 2 6125 7174<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Mob: + 61 451 046 412<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Email: fouad.karouta@anu.edu.au<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US 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> Thursday, 9 August 2012 3:14 AM<br><b>To:</b> 'labnetwork@mtl.mit.edu'<br><b>Subject:</b> [labnetwork] Toxic Gas Monitoring Systems<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=EN-US style='font-family:"Verdana","sans-serif"'>Hello All,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Verdana","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US 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 lang=EN-US style='font-family:"Verdana","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US 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 lang=EN-US style='font-family:"Verdana","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US 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 lang=EN-US style='font-family:"Verdana","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Verdana","sans-serif"'>Jerry<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Verdana","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Verdana","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Verdana","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Verdana","sans-serif"'>*******************************************<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Verdana","sans-serif"'>Jerry Bowser<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Verdana","sans-serif"'>NanoFab Operations Group<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Verdana","sans-serif"'>Center for Nanoscale Science and Technology<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Verdana","sans-serif"'>National Institute of Standards and Technology<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Verdana","sans-serif"'>Phone: (301) 975-8187<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p></div></body></html>