RFID
I saw the same company (Daifuku Mechatronics (S) Pte. Ltd.) at the Air X change at the Sing EXPO They did say that the spanners etc were ok to attach tags too ( as previously mentioned. With heat shrink) But sockets were another problem, they ended up with the tags in the cutouts which would tell the system if any sockets were not in place. Looked like a V expensive system