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Re: Oxygen

Ray Keefer wrote:
> 
>         This is good information. The other half of the equation is
> CO2. Which is just as tricky as O2. Try:
> 
> http://www.crowcon.com:80/toxgases.htm
> http://www.crowcon.com:80/toxgases.htm#Carbon Dioxide (CO2)

Good thing is that the air feels "stuffy" when there's too much of it.  A lack of oxygen 
gives no warning.

BTW,  I chased down a couple of quotes on oxygen meters with warning signals.  They vary 
between about $300 and $650.

Martin