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Personally, i would not even consider the 
expensive one or the extra filters.

What kind of quality does welding He have?? 
(I know that a lot of divers use this for diving.)

And can you please use a normal font?


Einar

----- Original Message ----- 
From: Manos Manoli <manos@ma*.co*.cy*>
To: Tech Diver <techdiver@aquanaut.com>
Sent: Monday, May 29, 2000 11:31 AM
Subject: He Purity


> I have talk with my Gas supplier and a found out that 99.995 purity on
> He costs a fraction (100$)
> comparing to the 99.999 (400$) that im buying up to now. The main
> point is that they cannot
> certify the impurity. That means that they cannot tell you whats in the
> rest of 0.005.
> So i figured that if the rest is O2 or Co2 then there is not really a
> problem but what if the
> rest is Co ?? I talk with a friend and he suggested to use 2 on line
> filters a Sub micron filter for
> the particles and a catalyst filter to break Co to Co2 .
> 
> Should i spend the 600$$ for the filters or should i just take my
> chances with 99.995 ?
> 
> Manos
> 
> 
> 
> 
> 
> 
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