| 摘要 |
PROBLEM TO BE SOLVED: To prevent the degradation in detection accuracy caused by wear in a magnet holder and a central axis of a frame into which a magnet is fitted, which occurs with long-term use. SOLUTION: The contactless liquid surface level sensor 10 includes: the resin magnetic holder 12 formed with a fitting hole 32; the resin frame 11 having the central axis 18 protruding from a frame main unit 16; a float arm 40; and a metallic rotational support 13 including a hollow tubular portion arranged between the internal peripheral surface defining the fitting hole 32 and the outer peripheral surface of the central axis 18. The magnetic holder 12 is turnably supported by the frame 11 through the hollow tubular portion in which the central axis 18 is arranged. COPYRIGHT: (C)2010,JPO&INPIT
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