DCHAS-L Discussion List Archive
Date: Thu, 10 Jun 2010 18:02:55 +0200
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: Pierre Rouzaud <p.rouzaud**At_Symbol_Here**GMAIL.COM>
Subject: Re: CO Detector for Academic Lab
In-Reply-To: <4e4f.52bd808f.3941aac8**At_Symbol_Here**cs.com>
--000e0cdf16a4d215190488af275f
be careful with smokers ,they have until to 14% of HbCO in their
blood,sometimes these values are disturbed by alcool or by diabetis
Pierre ROUZAUD
TOXICOLOGIST
Presidnt TABAC LIBERTE
10 RUE DES ARTS
TOULOUSE
2010/6/10
> 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
>
>
>
--000e0cdf16a4d215190488af275f
be careful with smokers ,they have until to 14% of HbCO in their b
lood,sometimes these values are disturbed by alcool or by diabetis
=A0
Pierre ROUZAUD
TOXICOLOGIST
Presidnt TABAC LIBERTE
10 RUE DES ARTS
TOULOUSE
2010/6/10
<ACTSNYC**At_Symbol_Here**cs.com>
<
font lang="0" size="2" face="Arial">The household detectors do not al
arm in time to save your health, only your life.=A0 They alarm at one of th
ree 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 T
LV-TWA is 25 ppm
EPA says 9.5 - 12.4 ppm ave for 8 hours is unhealthy for sensitive grou
ps
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 a
t 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 P
M Eastern Daylight Time,
mattlundgren**At_Symbol_Here**BOISESTATE.EDU writes:
It seems we have more a
nd more labs wanting to work with carbon monoxide and
I'm wondering
when you require a detector and what type.=A0 Where do you draw
the line for requiring a detector?=A0 Do you allow residential detectors fo
r certain
processes?=A0 When do you require a detector be linked into a
communication
system for alarms, security, etc?=A0 Is this based upon
quantity, the process, all of
the above?=A0 The labs will have quantities ranging from 80-140 cubic feet
in a
single cylinder.
Thanks,
Matt=A0=A0=A0=A0
<
/div>
--000e0cdf16a4d215190488af275f--
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