Date: Wed, 9 Jun 2010 22:41:12 EDT
Reply-To: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
Sender: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
From: ACTSNYC**At_Symbol_Here**CS.COM
Subject: Re: CO Detector for Academic Lab

The household detectors do not alarm in time to save your health, only your life.  They alarm at one of three levels:

100 ppm for <90 minutes
200 ppm for <35 minutes
300 ppm for <15 minutes
So theoretically you could be at 90+ ppm for ever and it still wouldn't alarm.

The OSHA PEL-TWA is 50 ppm
The ACGIH TLV-TWA is 25 ppm

EPA says 9.5 - 12.4 ppm ave for 8 hours is unhealthy for sensitive groups
EPA says 12.5 - 15.4 ppm ave for 8 hours is just plain unhealthy.

So I'd want a detector that would let me know at an ave of 10 ppm at 8 hours or provides digital read out of peak levels on demand down to 10 ppm.

Monona

In a message dated 6/9/2010 3:03:11 PM Eastern Daylight Time, mattlundgren**At_Symbol_Here**BOISESTATE.EDU writes:


It seems we have more and more labs wanting to work with carbon monoxide and
I'm wondering when you require a detector and what type.  Where do you draw
the line for requiring a detector?  Do you allow residential detectors for certain
processes?  When do you require a detector be linked into a communication
system for alarms, security, etc?  Is this based upon quantity, the process, all of
the above?  The labs will have quantities ranging from 80-140 cubic feet in a
single cylinder.
Thanks,
Matt    

Previous post   |  Top of Page   |   Next post



The content of this page reflects the personal opinion(s) of the author(s) only, not the American Chemical Society, ILPI, Safety Emporium, or any other party. Use of any information on this page is at the reader's own risk. Unauthorized reproduction of these materials is prohibited. Send questions/comments about the archive to secretary@dchas.org.
The maintenance and hosting of the DCHAS-L archive is provided through the generous support of Safety Emporium.