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Comment by TheBill | Hacker News Reader

Go to a praxair in the states and ask what the difference is: tested to 5x9's and loaded into a vacuum pulled bottle. ANY O2 at pressure is suitable to for human consumption at the surface because ANY impurities that are actually harmful would explode at 200 bar. Anything else (say from a PSA nitrox generator) would only be things like Argon.

Ad hoc O2 is better than no O2.

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You can't breathe in industrial Oxygen. At least, you need a humidifier cycle in between or it's going to dry out your lungs.

The simplest bubbler solves this issue.

And then you need to filter the output of the bubbler because microparticules will be suspended in the gas flow, and then you need to sterilize it, because you don't know what's growing in the bubbler, and then cool it down (is sterilize by heating it), and then you need to regulate the pressure of volume, etc....

hacking-rig an industrial oxygen generator is a very different thing from being able to generate breathable medical oxygen - when you're done with all the steps you'll end up at something that's very expensive and difficult to maintain in the end

That's natural, all breathing apparatuses already have to be treated like that. Having to washing the bubbler once in a while if a by far the better option to dying.

> When you're done with all the steps you'll end up at something that's very expensive and difficult to maintain in the end

Your alternatives?

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