The ERWEKA CWS is a modular Weighing Systems which can be used for single batch (standard CWS), multi-batch (CWS-M) with 10 batch-feeder magazine or for batches with high numbers of samples (CWS-BU). In combination with a sorting system the CWS systems allow to collect the measured samples according to tolerances. The CWS-BU allows a 100% quality control, samples outside a specified limit will be excluded from the batch.