MIB carries out an internal check test through three High-precision Contact Digital Sensors , 120º separated between them High-precision Contact Digital Sensors reach up to 70mm depth.. MIB carries out an internal check test through three High-precision Contact Digital Sensors , 120º60º article rotation movement and High-precision Contact Digital Sensor lift up in order to have 6 contact points The 6 contact points register offers essential information to Quality and Production Departments.