Type in "Oxygen Depletion Calculator" in google. The first hit is a spreadsheet from warwick.ac.uk. It is a spreadsheet download that helps you determine the level of displaced oxygen.
Martin
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
To: "DCHAS-L**At_Symbol_Here**PRINCETON.EDU" <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
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
http://www.dartmouth.edu/~ehs/
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