http://users.wpi.edu/~mpopovic/pages/OxygenConcentrator.html (http://users.wpi.edu/~mpopovic/pages/OxygenConcentrator.html)
20 000 indian rupies = 275 US$ Jan. 2021
https://www.google.com/search?client=firefox-b-d&q=low+cost+oxygen+generator (https://www.google.com/search?client=firefox-b-d&q=low+cost+oxygen+generator)
Oxygen generator/concentrator use medical
but also for
aquaculture,mining,waste-/water treatment,paper mills et cet.
Sincere
OCWL
p.s.: curing with oxygen as therapy
https://translate.google.com/translate?sl=auto&tl=en&u=https://www.loewen-apotheke-zoerbig.de/website/seite/sauerstoff-kur-nach-prof-manfred-von-ardenne-2391/ (https://translate.google.com/translate?sl=auto&tl=en&u=https://www.loewen-apotheke-zoerbig.de/website/seite/sauerstoff-kur-nach-prof-manfred-von-ardenne-2391/)
If you suffer from stress :P , feel drained :-\ or perhaps want to boost ;) your immune system before the flu season, then an oxygen cure would be a possible option.
Or e´spaciar,ambulare = Spaz-ieren gehen, "to go"-for a walk
https://translate.google.com/translate?sl=auto&tl=en&u=https://www.sueddeutsche.de/panorama/corona-spaziergang-covid-gesundheit-1.5166297?reduced%3Dtrue%26ieditorial%3D3 (https://translate.google.com/translate?sl=auto&tl=en&u=https://www.sueddeutsche.de/panorama/corona-spaziergang-covid-gesundheit-1.5166297?reduced%3Dtrue%26ieditorial%3D3)
A DIY Oxygen Concentrator may not be as difficult as one might think.
Needed:
2 small cylinders
Air compressor
Valves
Qty of the mineral zeolite.
Method:
Compressor pumps up cylinder 1 which contains the zeolite.
Wait for the air/zeolite process to complete.
Route the contents to cylinder 2 and on to the patient
Vent cylinder 1 to atmosphere for necessary time.
Repeat.
The main issue may be working out what products are widely available in India.