| 摘要 |
PROBLEM TO BE SOLVED: To provide a low-priced and highly reliable multi-point optical fiber type liquid level sensor, that is, a beam-condensing optical fiber type multi liquid level sensor by using a low-cost optical waveguide part inserted of a conventional optical fiber part. SOLUTION: A multi-type optical fiber type multi liquid level sensor comprising each optical fiber type liquid level sensor disposed at a plurality of positions with different detection levels, the optical fiber type liquid level sensor comprising an optical fiber for input, an optical fiber for detection and a prism part, in which an input light is totally reflected and detected only when the prism part is positioned above a level and a position of the level whether it exists above or below the prism part may be detected, wherein all of the optical fibers for input are integrated, and/or all of the optical fibers for detection are integrated or tied in a bundle in a form of an array. |
