The REX vacuum syringe is connected via a serial interface to a weighing terminal. Here, the syringe operator regularly weighs individual products (portions) selected from the continuous production process. The weighing results are automatically transferred to the syringe control system, which independently adjusts the weight of the portions to be filled to the set weight and displays the data on the touchscreen display. This guarantees the most accurate weight verification of the filled portions. At the same time, the system can always be used to provide documented data on the manufactured products as required by law. The RWS 3000/6000 weighing system is an economical solution that can be used in combination with a REX vacuum syringe in a wide range of applications.