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In a message dated 95-10-30 06:28:00 EST, you write:

>>  (3) A device to separate oxygen from atmospheric air, that can be carried
>>about and its output fed into an aqualung-type compressor, to refill
>>rebreather cylinders on site.
>
>This is a possible method, if enough power is available. There are ozone
>generators on the market, that first concentrates oxygene from the air
>and then transforms it into ozone. You should be able to pump the oxygen
>into tanks, but I have no idea about its purity. Maybe it is only a rich
>Nitrox.
>
>/Sten

     In a local medical supply shop I was looking for an O2 tank and I saw
one of those machines that people use at home. The owner of the shop told me
that the purity was about 98%. I think that the debit must be pretty low
though.

                                                                   Gil.

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