EAM (Electronic Autosizing Metrology) Gauge Head Models ECM/50/CS and Electronic Unit DS4R/ES and DS2R/ES. Manual EAM (Electronic Autosizing Metrology) Gauge Head Models ECM/50/CS and Electronic Unit DS4R/ES and DS2R/ES. Operating Instructions and an Electrical Schematic. Manufacturers: EAM Electronic Autosizing Metrology Models: 50 CS DS2R DS4R ECM ES Contents: Operators Manual Electrical Diagrams