My wife is a lab manager and says "this won't work because my lab won't take the time to walk to a computer and enter information when they want to use a chemical."
Well, that and I never wanted anyone else touching my enzymes. Anyone that ventured into my enzyme box without telling me was harshly dealt with.
I just realized that the above statement sounds strange if you're not a life sciences researcher... :)
Come to think of it, using NFC might work really well for logging supplies. Stick a NFC sticker (I bet tagstand would hook you up) on items you want to track.