"Ralph Jones" wrote in message
...
I take it the capability to fill portable containers is the motivation
for using lox, as opposed to using a concentrator?

The motivation for using lox is that oxygen systems can be much smaller and
lighter because the oxygen is in its most dense form and no high pressure tanks
are needed. This is why they are so popular for medical uses. A patient can
sling a LOX flask over a shoulder and go out for virtually all day; the same
mission with high pressure tanks would take an oxygen cart.

Vaughn

..

rj