Problem to be solved: to provide an equilibrium balance with an adjustable center of gravity to maintain the equilibrium of a centrifugal vessel in a centrifuge.Solution includes a slender body having a distal end and a proximal end, a weight 103 configured to be reversibly fixed at a position along the vertical axis of the elongate body, and a base 102 configured to couple the balancing bed of the centrifuge so as to be operable to the centrifuge.A method for maintaining the balance of the rotor of a centrifuge and a system suitable for performing the subject method in the separation of the components of the liquid sample by centrifugation are further provided.Diagram
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