| 摘要 |
PROBLEM TO BE SOLVED: To provide an oil check sensor easy in adjusting sensor sensitivity. SOLUTION: A cup-shaped electrode A and a plurality of bar electrodes Bi are arranged mutually oppositely, and an electric circuit short-circuiting the interval between the electrodes A, Bi having an electric resistance lower than a prescribed threshold is provided, and a variable resistance Rai whose resistance value is set at a different value as a threshold resistance is interposed between each electrode Bi in the electric circuit and a supply voltage Va, and each interval between the electrodes A, Bi having a lower electric resistance than the resistance value of each variable resistance Rai is short-circuited by each operation amplifier Ci. Hereby, the sensor sensitivity can be adjusted easily only by changing a setting interval of the resistance value of each variable resistance Rai. COPYRIGHT: (C)2007,JPO&INPIT
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