A fill level measurement device senses the fill level of an object within a container. A fill level measurement sensor provides a sensed fill level signal indicative of the level within the container. A signal processing device is responsive to the sensed fill level signal and includes a first removable and replaceable component that includes a first memory device. The signal processing device also includes a second removable and replaceable component that includes a second memory device containing component customer parameter data. The second removable and replaceable component transmits the component customer parameter data to the first removable and replaceable component via a data link that electrically isolates the first and second removable and replaceable components, and the first removable and replaceable component stores the received component customer parameter data into the first non-volatile memory device.