I suggest that you Google “oxygen deficiency monitoring equipment”. The equipment is used for confined space monitoring or where there is likelihood that the release of cryogenic gases (LN2) could lower the amount of oxygen in the room and cause the occupants to be asphyxiated.
From: DCHAS-L Discussion List [mailto:dchas-l**At_Symbol_Here**MED.CORNELL.EDU] On Behalf Of bjwiehe**At_Symbol_Here**OWU.EDU
Sent: Wednesday, August 29, 2012 7:01 AM
To: DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU
Subject: [DCHAS-L] Oxygen Sensor
We are installing an Oxygen Sensor in a room using Liquid Nitrogen. Question, why do you mount it in the room where loss of Oxygen would be present? What type of training should the technician have overseeing the monitor?(ie respirator fit)
Barb Wiehe
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