The roller scale PCE-SD ... CR series is designed for applications in many processes and delivery businesses, since the roller scale supports many interfaces. Furthermore the roller scale features a standard RS-232 interface. In addition the roller scale PCE-SD CR series can be equipped with further interfaces which enable control of the roller scale. For example, the roller scale can be extended with an analogue output 4-10 mA or 0-10 V, or even potential-free contacts. The roller scale is calibrated and thus can be used for tasks in areas of custody transfer. The roller scale can be also integrated into larger rollers, and hence can be used as an extension module.