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All you need is zeolite crystals and a compressor. Zeolite fixes nitrogen under pressure, so you can use it to separate nitrogen from oxygen. This is how those

by dTal 3y ago

All you need is zeolite crystals and a compressor. Zeolite fixes nitrogen under pressure, so you can use it to separate nitrogen from oxygen. This is how those "oxygen concentrators" work. I'm sure you get can hold of a relatively-cheap chinese one, they don't have dangerous parts or controlled substances. But it wouldn't be that hard to build one from scratch either. https://www.aliexpress.com/w/wholesale-oxygen-concentrator.html https://www.aliexpress.com/w/wholesale-oxygen-concentrator.h...

genewitch 3y ago
> Sorry, your search "oxygen concentrator" did not match any products. Please try again. i thought it might be because of the /w/wholesale path, so i went to aliexpress (i have an account) and searched on the main page, and it gave the same result. Curiously, "oxygen concentrat" as the search term brings up alleged devices. This dovetails with my very short comment that such devices are hard to find without prescriptions, in the US. Searching for similar things on amazon only brings up carrying cases and accessories for the "well known" brand(s) of oxygen concentrators. And for some reason both sites show results for these things that blow air in your face for whatever reason...
- dTal 3y ago
  Wow. Indeed my country was not set to USA. It seems that they do filter the results for USA customers, and researching further suggests that the FDA's position is that they not be used without a prescription. But is it illegal to sell one? Is it illegal to even make one? The situation seems murky. And silly.
- Dagger2 3y ago
  AliExpress search is kinda wonky, it sometimes just breaks for a bit on specific search terms, or maybe it'll work but only for certain sort orders. The link is giving search results for me (although admittedly I'm not in the US, so if they're doing any country-specific filtering for US clients I wouldn't know about it).

by dTal 3y ago

genewitch 3y ago

> Sorry, your search "oxygen concentrator" did not match any products. Please try again. i thought it might be because of the /w/wholesale path, so i went to aliexpress (i have an account) and searched on the main page, and it gave the same result. Curiously, "oxygen concentrat" as the search term brings up alleged devices. This dovetails with my very short comment that such devices are hard to find without prescriptions, in the US. Searching for similar things on amazon only brings up carrying cases and accessories for the "well known" brand(s) of oxygen concentrators. And for some reason both sites show results for these things that blow air in your face for whatever reason...

dTal 3y ago
Wow. Indeed my country was not set to USA. It seems that they do filter the results for USA customers, and researching further suggests that the FDA's position is that they not be used without a prescription. But is it illegal to sell one? Is it illegal to even make one? The situation seems murky. And silly.
Dagger2 3y ago
AliExpress search is kinda wonky, it sometimes just breaks for a bit on specific search terms, or maybe it'll work but only for certain sort orders. The link is giving search results for me (although admittedly I'm not in the US, so if they're doing any country-specific filtering for US clients I wouldn't know about it).