Capacitance-based instrumentation for multi-interface level measurement

摘要: An electrical capacitance method is described for the measurement of multi-interface levels gas/liquid/solid, including foam layer. It uses a novel multi-electrode sensing element. A transducer based on charge/discharge principle used, which stray immune and capable operating at high frequencies to reduce effects liquid conductivity measurement. The presence detected by processing fluctuating component signal, reflects inherently unstable feature foam, whereas are reconstructed steady-state measured capacitances.