| 摘要 |
PROBLEM TO BE SOLVED: To provide an oil check sensor capable of accurately checking the contamination degree of oil caused by a metal powder. SOLUTION: The electrode opposed to a cup-shaped electrode 9 in the sensor head 4 on the outer peripheral side of a permanent magnet is formed of a plurality of rod-shaped conductors 10 and the intervals between the conductors 10 and the electrode 9 are set so as to be stepwise become different while the resistance value Rn of the resistor 14a interposed between the conductor 10 set to a narrow interval and the electrode 9 is largely set and the conductor 10 narrow in the interval with the electrode 9 is short-circuited preceedingly. By this constitution, a change in the partial pressure voltage (n) detected by a voltmeter 15 as the output of the sensor accompanying an increase in a short-circuit number is leveled to make the short-circuit number (n) plainly and the contamination degree of oil caused by the metal powder is detected more clearly. COPYRIGHT: (C)2006,JPO&NCIPI
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