A control system for a cleaning device for cleaning surgical instruments, The control system including: a controlling or regulating device at least one first sensor operatively connected to the controlling or regulating device, wherein the controlling or regulating device controls or regulates a cleaning processes of the cleaning device as a function of measured values of the at least one first sensor a supplementary monitoring device and at least one second sensor operatively connected to the supplementary monitoring device wherein the supplementary monitoring device is electrically connected to the controlling or regulating device and is configured to exchange measured data and/or processed data of one or more of the at least one first sensor and the at least one second sensor between the controlling or regulating device and the supplementary monitoring device.
