From:
Tammy M Lutz-Rechtin <00001eefcacf32aa-dmarc-request**At_Symbol_Here**LISTS.PRINCETON.EDU>
Subject:
Re: [DCHAS-L] Oxygen monitors for intert gas safety
Date:
Feb 6, 2025 16:09 UTC
Reply-To:
ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU>
Message-ID:
<SA0PR04MB7449A38B227899DB1CB5095DBAF62**At_Symbol_Here**SA0PR04MB7449.namprd04.prod.outlook.com>
In-Reply-To:
<CAF85TGR5WUHDGwNaTiY5FRS1E96EQSQuire35tgs50_kPqZhhg**At_Symbol_Here**mail.gmail.com>
Considerations for Oxygen Monitoring in Your Application
Dear Amber,
I wanted to share a few key considerations regarding your application:
- Air Turnover and Monitoring Necessity: Has anyone performed calculations for the room and cylinder to determine air turnover? If
there is only one tank of argon, and a functioning fume hood, an oxygen monitor may not be necessary.
- Routine Testing and Calibration: If you proceed with installing an oxygen monitor, ensure that routine testing and calibration
procedures are in place. In my experience, lower-cost oxygen sensors often require annual replacement, or more frequent maintenance depending on environmental factors.
- Certified vs. Non-Certified Monitoring: Do you require a certified monitoring system? If certification is not necessary, I personally
recommend a single sensor from RKI over BW-brand monitors.
Additionally, I have had excellent long-term experience with PureAire monitoring systems, which have integrated alarms and have operated reliably for over 12 years with minimal maintenance
in a research lab environment.
I hope this information helps. Please let me know if you have any questions.
Best regards,
Tammy
Chemical Engineering Safety Coordinator
University of Arkansas
From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU>
On Behalf Of Alyssa Brand
Sent: Wednesday, February 5, 2025 6:36 PM
To: DCHAS-L**At_Symbol_Here**Princeton.EDU
Subject: Re: [DCHAS-L] Oxygen monitors for intert gas safety
I don't know what your budget is like, but we use multiple of these units and they hold up really well over many years. We've had some in place for 15 years now and they're still working beautifully. They auto-calibrate and just need the
little inlet filters changed now and then.
https://oxygenanalyzers-oxygensensor.oxigraf.com/item/oxygen-deficiency-monitor/o2im-oxygen-deficiency-analyzer/07-0180
We like to place the sensor so that the inlet is at more or less breathing height for a short person, like 4-5 feet off the ground.
Alyssa Brand
Chemical Safety Specialist
We use liquid argon for our ICP-MS indoors and I'm looking to increase our safety by including an oxygen monitor in the room. It would be used to ensure if the argon tank releases pressure/vents, the room is safe to occupy.
We have two doors to other rooms to control access to the space and/or allow fresh air in, fans and a fume hood in the room with the gas tank for air exchange as well as building air exchange in the ceiling.
We will also be venting the release valve into the fume hood to avoid pressure release argon from filling up the space.
Any information or guidelines for increasing our safe usage of this would be appreciated.
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