APOLLO BM2000 Wire String Sensor 05940023 392-9002 04-21-30070 Paver Leveling Sensor Precision Wire String Sensor for BM2000 Milling and Paving Machines The APOLLO BM2000 Wire String Sensor (Part Numbers 05940023, 392-9002, 04-21-30070) is a precision-engineered string sensor for the BM2000 milling machine and asphalt paver leveling system. It delivers accurate positional feedback for the machine's measurement and control loop, keeping paving and milling operations within