This could change SCUBA as we know it.

[August]

Again though, oxygen is deadly at depth. Unless there is a way to add helium or other inert gas the use of this gizmo would be limited to 15' or less.

[Gargamel]

Originally Posted by August

Again though, oxygen is deadly at depth. Unless there is a way to add helium or other inert gas the use of this gizmo would be limited to 15' or less.

It's almost useless, given your point, for recreational divers. Air is 22% O2, 75% N2, and 2% CO2, plus some other rubbish (I'm off with those numbers, i just forget the exact amount of N2). If you remove the O2, you're only saving 22% volume in compressing the air you'd have to mix. The expense of doing that for a rec diver is not worth it, when a tank of compressed air is almost free. Heli-ox though..... It'd save ya a whole tank IIRC.

[August]

The thing is you have to be able to take in an entire lungful of air in order to breath properly.

That becomes a problem at depth because gas has to be compressed to overcome water pressure. If I remember my SCUBA lessons right, every 33' down gas compresses by half it's volume. That means at say 100' feet every breath you take is the equivalent of 4 lungfuls of air and therefore 4 times the amount of oxygen molecules with each breath. Eventually if you go deep enough you can take in a toxic amount of oxygen just by breathing normally and that's using regular air.

Now if you're breathing in pure oxygen like this device creates then you don't have to go very deep before you get to that point that's why it has to be have some other gas mixed in with it.

[Wolferz]

In terms of a Self Contained Underwater Breathing Apparatus...

Make mine a Balao.

[August]

Originally Posted by Wolferz

In terms of a Self Contained Underwater Breathing Apparatus...

Make mine a Balao.

No way would I ever go diving with 60+ year old gear unless I had a death wish.

[Wolferz]

Originally Posted by August

No way would I ever go diving with 60+ year old gear unless I had a death wish.

Well, refurbished of course.
Besides, the only diving I'll ever do is virtual and muff. I hate water and the oceans stink. No way will I voluntarily jump into the big fish toilet.

[August]

Originally Posted by Wolferz

Well, refurbished of course.
Besides, the only diving I'll ever do is virtual and muff. I hate water and the oceans stink. No way will I voluntarily jump into the big fish toilet.

So a dip in the Ganges is out of the question then?