Posted by NickD (209.83.95.157) on April 06, 2000 at 20:04:09:
In Reply to: O2 concentrator...please describe posted by Dennis O'C on April 06, 2000 at 18:36:23:
http://206.152.242.90/pcatalog/gss.nsf/02274b089d3aaf4c8525642600654880/67a817b31a8da8d0852565300040880b?OpenDocument
Basically two beds of zeolite are used that absorb nitrogen from the air after being filtered out leaving 90% oxygen, zeolite is a sand like substance that absorbs nitrogen naturally, hope this helps.