Hi Sylvia,
I've used Honeywell's Midas Oxygen sensors. They aren't too expensive and easy to calibrate and change sensors.

Ashley

-----Original Message-----
From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU> On Behalf Of SYLVIA TARINBROUSSEAU
Sent: Tuesday, September 27, 2022 3:49 PM
To: DCHAS-L**At_Symbol_Here**Princeton.EDU
Subject: [EXTERNAL] [DCHAS-L] Oxygen monitor recommendations

Hello

I am in need of oxygen monitor recommendations for our tank room. We have a six pack of helium as well as nitrogen tanks. Its end of fiscal for us, so of course it would decide to go belly up.

Thank you

Sylvia Tarin-Brousseau
Sr. Forensic Chemist
DEA Southwest Laboratory

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