Cells in suspension need media change. It is a well known workflow to generate cell pellets by centrifugation and discard the supernatant. Due to its precise control of all movements of the rotor Blue®Washer can automate removal of supernatant while retaining cell pellets, using proprietary, low strain centrifugation settings. This reliable and reproducible method substantially simplifies and speeds up cell wash steps for flow cytometry and other suspension cell workflows.