From: "Bell,Martin" <mwb32**At_Symbol_Here**>
Subject: Re: [DCHAS-L] O2 Sensor Determination
Date: Tue, 17 Jul 2018 19:10:03 +0000
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: 909B6171-19B1-47FE-B948-D19329A11CCD**At_Symbol_Here**

Type in "Oxygen Depletion Calculator" in google. The first hit is a spreadsheet from It is a spreadsheet download that helps you determine the level of displaced oxygen.





From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU> on behalf of "Jeffrey R. Cogswell" <Jeffrey.R.Cogswell**At_Symbol_Here**DARTMOUTH.EDU>
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Date: Tuesday, July 17, 2018 at 2:53 PM
Subject: [DCHAS-L] O2 Sensor Determination


Does anyone have a good reference for determining when a room needs an O2 sensor? I'm looking for an amount of liquid gas (nitrogen, argon, helium) vs cubic feet calculation. (We're assuming total catastrophe here: no ventilation and all the cryo-liquid escapes). Dartmouth is looking at doing an overhaul of all the O2 sensors on campus. Facilities will oversee maintain/scheduling of these sensors and require a "hard and fast" rule from EHS to justify their installation.


Jeffrey R. Cogswell, Ph.D.

Chemical Inventory and Laboratory Resource Center Technician, EHS

37 Dewey Field Road, HB 6216

Hanover, New Hampshire 03755

P: 603.359.0128  F: 603.646.2622


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