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Joel Silverstein wrote:
>$6 bucks a fill you have to be losing some money. 
>Let's examine the process here.  A cylinder comes in for an enriched air
>fill. The cylinder must be analyzed, label removed, mixed, analyzed, and
>labeled, if the mix was correct -- great -- if not adjustments need to be
>made or remixed. (yeah even the best make a mistake now and then. Then when
>the client comes in analysis is done again for verification.

When we calculate cost for a nitrox cylinder, following factors have to be
taken into consideration:
1. Labour costs
2. Cost of oxygen
3. Cost of compressed air
4. Apportionment for maintenance
5. Apportionment for interest on initial investment
6. Cost of venting residual gas

Taking these factors, some operators manage to keep their costs as low as
$2,- a fill.
Now if they sell at $6,- they make $4,-

>Somewhere along the line it looks as if this whole process is about 20-30
minutes.

Depends on the blending system used. You should know that.
There are systems delivering the right mix within 5 min. Never a wrong mix.
I think you even used it a couple of times.

>If you batch process tanks maybe you get to fill upwards of 6-10 at a time,
>but very few facilities do.  IF the tanks you are filling all require
>different mixes then its even more time. Oxygen is not expensive, in fact
>its the least costly of the process.

Not true, I think it the cost of compressed air is lower.

  The big issue is time for handling,
>verification and documentation. 

The big issue is Labour cost, you are right with that. 

>Take it slow and do it right. The wrong mix will kill someone. 

Not analysing will kill someone. How can the blender be responsible when a
diver collects his nitrox? Isn't that why we use analysers and fill log's?

Later, 

THOMAS
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