>From: marty3006@aol.comNoSpam (Marty Singer)

> buddy has is genisis tanks filled with NITROX to 4000 and
>the mix is typically +/- 1% from what he asks for and almost never more then
>2%
>off.

> I have my tanks filled to 3300 and I do not get any more
>accurate analysis then he does.

This variation probaly isn't caused by departures from the ideal gas law. Such
departures would consistently be either + or - depending on the properties of
the gases involved. This consistency would also allow somebody with a memory or
a notebook to reproduce the results once they achieve an accurate mix. Maybe
the people filling your tanks figure that +/- 1% is "good enough"?


Steve

The above can be construed as personal opinion in the absence of a reasonable
belief that it was intended as a statement of fact. Or it might just be to