This is awesome info. Always appreciate the insight that you share w/ us Matt.Bellator did this during Bjorns era on about 5 or 6 cards. I honestly have no idea what happened to the data or what was done with it. Initially it was to give real time info during the fight but I think the tech wasnt quite up to speed yet.
The sensor was a small box looking thing, about half the size of a starburst candy. They had the cutmen put it under the last layer of tape on the top of the wrist. I expected fighters to complain about it being there but surprisingly none did.