The device is fits for balancing adjustment for parts with disc shape such as fan,pressure plate,flywheel, brake disc, ring blower, impeller,arrester, saw blade, pulley. Adopt industrial computer (SCM) in measuring system. Digital displays for rotate speed, measured value and phase, and unbalanced amount shows in “g” directly. The system can correctly display the unbalance amount (“g”) of workpiece and its phase and also can display its memory after you input various parameters through the keyboard according to the geometric dimension of different kinds of workpiece. Simple operation, straight display Adopt electromagnetic sensor in electromechanical transducer,. Feature in large output, reliable performance and excellent stability.