| 摘要 |
PROBLEM TO BE SOLVED: To provide an apparatus which allows accurate liquid level measurement even when there are external influences such as a temperature change. SOLUTION: The liquid level measuring apparatus 10 comprises a pair of electrodes 14, 16 provided in a vessel 12, an oscillator circuit 18, a first supply circuit 20 for supplying an electric current to one of the pair of electrodes 14, 16 from the oscillator circuit 18, a detection circuit 22 for measuring the electric potential of the electrode 14, a second supply circuit 24, a reference circuit 26 to which electric power is directly supplied from the second supply circuit 24, and a comparator circuit 28 for outputting the difference in electric potential between the detection circuit 22 and the reference circuit 26. COPYRIGHT: (C)2006,JPO&NCIPI
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