Strain gauge L-Cell

The L-Cell is optimally suited for retrofitting to existing silos; for a reproducible mass measurement whenever the classical level measurement does not achieve the desired result. The measuring cells are used to record the mass of bulk materials and liquids in frame silos. The measuring cells have a particular advantage over level measurements at the top of the silo when core flow occurs in the silo, i.e., the bulk material is only in motion in the area above the discharge opening. The result is bridge or chimney formation. The L-Cell reliably captures the weight. Furthermore, the L-Cell is a cost-optimized solution, as the assembly is carried out with fastening screws directly on the existing strut construction of the silo. The plant does not have to be emptied or rebuilt for this.

Functionality

During filling or emptying, a compression, elongation, or shearing occurs in the silo substructure. This path change is captured by the L-Cell and the mass is evaluated via the transducer. The sensors consist of two semiconductor strain gauges, which are ceramically connected to a bending rod. Since the two semiconductor strain gauges are connected with a half bridge, the usual temperature drift in semiconductors is compensated.