| 摘要 |
An apparatus for determining and/or monitoring at least one process variable of a medium, and includes a sensor unit, a feedback electronics and a supplemental electronics. The sensor unit, feedback electronics and supplemental electronics form a first oscillatory circuit, which oscillates with at least one resonance frequency (omega<SUB>1</SUB>) and/or with a resonance frequency (omega<SUB>res</SUB>) within at least one resonance frequency range. The feedback electronics and the supplemental electronics form a second oscillatory circuit, which oscillates at a resonance frequency (omega<SUB>cablebreak</SUB>), which differs from the resonance frequency (omega<SUB>res</SUB>, omega<SUB>1</SUB>) of the first oscillatory circuit.
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