Good source for NASA equipment?

[johndallman]

Originally Posted by PTTG

they're trying to prove they aren't undergoing some kind of oxygen deprivation, so of course they'd look at the scrubbers, and seeing that they're not only functioning, but apparently refreshed, would probably be impressive.

OK, that works if we presume the LiOH cartridges in the scrubbers had indicator dyes, which seems plausible. Of course, you need to photograph them just to have proof what you were seeing wasn't hallucinatory.