TD4C desktop low-speed centrifuge is a conventional instrument for centrifugal precipitation in medicine and biology. The maximum speed is 4000r/min, the maximum capacity is 4×50ml, and the maximum centrifugal force is 2200×g. The instrument is driven by a frequency conversion motor, the speed and time are digitally displayed, and the electrical control system is controlled by a microprocessor, which is easy to operate, humanized and beautiful in appearance and simple in structure. The centrifuge uses the principle of centrifugal sedimentation to separate, concentrate or purify cells (particles) with different densities in the solution under the action of centrifugal force.