| 摘要 |
PROBLEM TO BE SOLVED: To reduce an electrolysis amount of water while preventing corrosion of an electrode in a water detector. SOLUTION: This detector is constituted of two electrodes 1, 2 provided under water, a positive pulse generating means 3 and a negative pulse generating means 4 for impressing alternately positive and negative voltages between the two electrodes, an electric continuity detecting means 6 for detecting a current flowing between the two electrodes, and a timer means 7 for driving intermittently and alternately the positive pulse generating means 3 and the negative pulse generating means 4. COPYRIGHT: (C)2004,JPO&NCIPI
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