[labnetwork] Honeywell MST Sensors

[Mark Chiappa]

Hi Hadi,

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)

[cidimage001.png at 01D82A32.AC76FC40]
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.

Kind regards
Mark

Mark Chiappa
Senior Engineer
NTNU NanoLab
Sem Sælandsvei 14
Trondheim 7034
Mob: (+47) 91897617


From: labnetwork <labnetwork-bounces at mtl.mit.edu> on behalf of Leif Steen Johansen <lesjo at dtu.dk>
Date: Wednesday, 15 June 2022 at 13:48
To: Hadi Esmaeilsabzali <hadi_esmaeilsabzali at sfu.ca>, Lab Network (labnetwork_mtl.mit.edu) <labnetwork at mtl.mit.edu>
Cc: Henrik Nyholt <henny at dtu.dk>
Subject: Re: [labnetwork] Honeywell MST Sensors
Hello Hadi,

We have the exact same problem.
You could try to contact Sensorix in Germany who claims to have drop-in replacements for MST: https://www.sensorix.com/

A word of caution:

  1.  We haven’t tried these sensors ourselves, so we don’t know how they work.
  2.  If you use a third-party vendor, there is a potential risk that the gas detection system won’t work properly.

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.

Best regards,
Leif

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From: hadi_esmaeilsabzali at sfu.ca
Sent: 14 June 2022 22:59
To: labnetwork at mtl.mit.edu
Subject: [labnetwork] Honeywell MST Sensors

Dear Colleagues,

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. 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. Anyone facing the same issue? Are there other reliable suppliers we can purchase these sensors from? Any advice is appreciated!

Hadi

Hadi Esmaeilsabzali, PhD
Nanofabrication Group Manager, 4D LABS
Simon Fraser University
8888 University Dr., Burnaby, B.C. V5A 1S6
T: 778.782.3790<tel:7787823790> | F: 778.782.3765<tel:7787823765> | www.4dlabs.ca<http://www.4dlabs.ca/>
Facebook<https://www.facebook.com/4dlabs/> | Twitter<https://twitter.com/4D_LABS> | LinkedIn<https://www.linkedin.com/company/sfu-4d-labs/about/>
[cid:part6.8FF00374.702EDDDC at 4dlabs.ca]
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