Impedance level sensor

A method for operating an impedance point level sensor with

• a probe, which can be influenced by a medium surrounding the probe in a measuring capacity, with the probe comprising a measuring electrode and a reference electrode isolated from the measuring electrode, between which the measuring capacity forms,
• a measuring oscillation circuit, in which the probe is arranged as a capacity-determining element,
• an electronics unit with a signal generator to excite the measuring oscillation circuit and, excite the measuring resonant circuit with a frequency sweep, and
• an evaluation and control unit for generating a measuring signal, which is connected to the electronics unit, in which the measuring oscillation circuit is excited via the signal generator with a plurality of different frequencies,
• wherein the resonance point of the measuring oscillation circuit occurs by determining a current at an input of the signal generator.