I've noticed that pretty much every time there is an autofill of the dewars in the hutches of SSRL or APS, the oxygen sensors go off. but that is a small space and many liters of liquid nitrogen. I've frozen routinely in a small cold room with a liter or 2 of liquid nitrogen with no issue.
-----Original Message----- From: CCP4 bulletin board on behalf of Jacob Keller Sent: Fri 7/13/2012 4:42 PM To: CCP4BB@JISCMAIL.AC.UK Subject: Re: [ccp4bb] harvesting in cold room How frequently do the sensors go off? JPK On Fri, Jul 13, 2012 at 4:37 PM, David Schuller <dj...@cornell.edu> wrote: > On 07/13/12 17:29, Jacob Keller wrote: > > You probably already know this, but nitrogen is not at all > poisonous--about 78% of the air is nitrogen. I guess you were probably > worried about asphyxiation....? > > > We have oxygen sensors in our X-ray hutches for precisely that reason. > > -- > ======================================================================= > All Things Serve the Beam > ======================================================================= > David J. Schuller > modern man in a post-modern world > MacCHESS, Cornell University > schul...@cornell.edu > > -- ******************************************* Jacob Pearson Keller Northwestern University Medical Scientist Training Program email: j-kell...@northwestern.edu ******************************************* This email was scanned with Mcafee's Anti-Virus appliance, but this is no guarantee that no virus exists. You are asked to make sure you have virus protection and that it is up to date.
