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<p class="MsoNormal"><span lang="NO-BOK" style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">Hi Hadi,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="NO-BOK" style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">Here at NTNU NanoLab we had the same issue. I decided to give the company in Bonn a try. I didn´t feel I could defend knowingly having
sensors in that were beyond their projected life cycle if something were to happen. So far we have had no issues. We installed them and calibrated with test gas. The only concern I have is the lifetime, the replacements from the alternate supplier in some
instances are slightly shorter than the Honeywell MSTs. This is related to a patent on a particular electrolyte, they informed us that from the end of next year all their sensors will have the same lifecycle as Honeywell. For us that issue was for SiH4 and
B2H6. There are other sensors in their range with the same issue (see table below)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><img width="181" height="175" style="width:1.8854in;height:1.8229in" id="Picture_x0020_7" src="cid:image001.png@01D880C8.6BB44360" alt="cidimage001.png@01D82A32.AC76FC40"><o:p></o:p></span></p>
<p class="MsoNormal"><i><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">The Hydride sensors have the organic electrolyte with a life time of 6-8 month. The Hydride sensors with the ion electrolyte (Life Time 12-24
month) will be available by end of 2023. Honeywell has a patent on the ion electrolyte.</span></i><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">Kind regards<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">Mark<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">Mark Chiappa<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">Senior Engineer<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">NTNU NanoLab<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">Sem Sælandsvei 14<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">Trondheim 7034<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">Mob: (+47) 91897617 <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span lang="DA" style="font-family:"Calibri",sans-serif;color:black">From:
</span></b><span lang="DA" style="font-family:"Calibri",sans-serif;color:black">labnetwork <labnetwork-bounces@mtl.mit.edu> on behalf of Leif Steen Johansen <lesjo@dtu.dk><br>
<b>Date: </b>Wednesday, 15 June 2022 at 13:48<br>
<b>To: </b>Hadi Esmaeilsabzali <hadi_esmaeilsabzali@sfu.ca>, Lab Network (labnetwork_mtl.mit.edu) <labnetwork@mtl.mit.edu><br>
<b>Cc: </b>Henrik Nyholt <henny@dtu.dk><br>
<b>Subject: </b>Re: [labnetwork] Honeywell MST Sensors<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-family:initial">Hello Hadi,</span><span lang="DA"><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-family:initial">We have the exact same problem.</span><span lang="DA"><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-family:initial">You could try to contact Sensorix in Germany who claims to have drop-in replacements for MST:
</span><span lang="EN-US"><a href="https://www.sensorix.com/">https://www.sensorix.com/</a></span><span lang="DA"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> </span><span lang="DA"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">A word of caution: </span><span lang="DA"><o:p></o:p></span></p>
<ol style="margin-top:0cm" start="1" type="1">
<li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo2"><span lang="EN-US" style="font-family:initial">We haven’t tried these sensors ourselves, so we don’t know how they work.</span><span lang="DA"><o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo2"><span lang="EN-US" style="font-family:initial">If you use a third-party vendor, there is a potential risk that the gas detection system won’t work properly.</span><span lang="DA"><o:p></o:p></span></li></ol>
<p class="MsoNormal"><span lang="EN-US" style="font-family:initial"> </span><span lang="DA"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:initial">Even though Honeywell recommends changing the MST gas sensors every 6 months, they might possibly function longer. According to a 6 year old data sheet for chlorine they guarantee < 10 % decay/6
months, but the sensor life time is specified to 3 years. </span><span lang="DA"><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-family:initial"> </span><span lang="DA"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:initial">Best regards,
</span><span lang="DA"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:initial">Leif</span><span lang="DA"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Slate Pro";color:#0073BC"> Original Message </span><o:p></o:p></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"> hadi_esmaeilsabzali@sfu.ca</span><o:p></o:p></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif">Sent:</span></b><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif"> 14 June 2022 22:59</span><o:p></o:p></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif">To:</span></b><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif"> labnetwork@mtl.mit.edu</span><o:p></o:p></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif">Subject:</span></b><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif"> [labnetwork] Honeywell MST Sensors</span><o:p></o:p></p>
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<p class="MsoNormal"><span lang="DA" style="font-size:11.0pt">Dear Colleagues,</span><span lang="DA"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="DA"> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt">Another supply chain story here. Honeywell has informed us that the MST sensors that we had ordered in April 2021 and were supposed to be delivered earlier in March of this year won't be ready
until early 2023. </span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">All our gas sensors (NH3, Cl2, SiH4, HCl) are due for replacement, and we are currently concerned about the risk of running possibly expired sensors.</span><span lang="EN-US" style="font-size:11.0pt"> Anyone
facing the same issue? Are there other reliable suppliers we can purchase these sensors from? Any advice is
</span><span lang="EN-US">appreciated!</span><span lang="EN-US" style="font-size:11.0pt"> </span><span lang="DA"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> </span><span lang="DA"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt">Hadi</span><span lang="DA"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> </span><span lang="DA"><o:p></o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#212121">Hadi Esmaeilsabzali, PhD</span></b><span lang="DA"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#212121">Nanofabrication Group Manager, 4D LABS</span><span lang="DA"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#212121">Simon Fraser University</span><span lang="DA"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#212121">8888 University Dr., Burnaby, B.C. V5A 1S6</span><span lang="EN-US" style="color:#212121"><br>
</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#212121">T:
</span><span lang="DA" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#212121"><a href="tel:7787823790"><span lang="EN-US">778.782.3790</span></a></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#212121">
| F: </span><span lang="DA" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#212121"><a href="tel:7787823765"><span lang="EN-US">778.782.3765</span></a></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#212121">
| </span><span lang="DA" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#212121"><a href="http://www.4dlabs.ca/"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">www.4dlabs.ca</span></a></span><span lang="EN-US" style="color:#212121"><br>
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