The environment in the silos is not exactly a friendly one for level gauges. Temperatures inside are sometimes very high. This places special demands on the sensors. When the silos are being filled, overpressure can build up if the filters get clogged. VEGABAR 82 pressure transmitters
are deployed here and for overfill protection, VEGAVIB 63 sensors
are used. Together, these instruments protect against excessive pressure and overfilling in the vessel. In addition, special dust explosion protection requirements must be observed. When filling the silos via compressed air, milk powder or lactose is whirled up - such fine materials then settle everywhere, even on the measuring instruments. Exact measurement of the level is absolutely necessary despite these conditions. Until recently, a sensor based on guided microwave technology had been used for level measurement. For point level detection, i.e. protection against silo overfilling, the company had been using a capacitive method. New silos were eventually installed and RITTER SPORT was looking for a state-of-the-art solution.