System for managing of bulk liquids and/or solids

A system for managing of bulk liquids and/or bulk solids for in-vitro diagnostics is disclosed. The system comprises a sample processing unit and at least one bulk container unit for receiving at least one bulk liquid and/or bulk solid supply container for supplying the sample processing unit with at least one bulk liquid and/or bulk solid respectively, and/or at least one bulk liquid and/or bulk solid waste container for receiving at least one bulk liquid and/or bulk solid waste respectively from the sample processing unit. The system further comprises at least one weight measuring device comprising a loading plate, a reference base and a force measuring cell connected to the loading plate and the reference base, the force measuring cell comprising a vibrating wire sensor comprising a tensioned sensor wire, wherein the loading plate is adapted to be biased with respect to the reference base by a weight applied to the loading plate by a bulk container and to transfer force to the force measuring cell, the transferred force causing a deformation of the force measuring cell and thereby a change in tension of the sensor wire, which causes a change in vibrational frequency, thereby resulting in an electric signal indicative of the weight of the bulk container.