This machine adopts the purpose-built, special-purpose motor, which has little noise, long service, small volume, light weight and convenient to take, widely used in fields such as teaching, science and research, medical testing and outdoor medicine, chemistry etc. It has timing and regulating speed electronic cover protection, short time acceleration. It is equipped with 2m, 0.5ml precise balance multifunction rotators ( 120 O C temperature endurance), can support different types of centrifugal pipes.