AURORA, Ill.--(BUSINESS WIRE)--Mitutoyo America Corporation is showcasing its highest performing micrometer and caliper lines, including High-Accuracy Digimatic Micrometer, QuantuMike Series 293 ...

If I recall correctly, the protocol is closely related to the one used by Chinese calipers and micrometers. I also own one (a generic Chinese version). Mine came with a RS232 converter, however.