| 摘要 |
An optical level sensor (1) includes: mounting means (11) mounting the sensor (1) to a ceiling of the tank (9); a sensor tube (12, 12.1) provided with support and guidance elements (4) extending with at least three radially distributed positions inside the tank (9) and which collect support and guide optical fibers (3, 3.3, 3.4) to different heights of the tank (9), with each optical fiber (3) having a number of input sides (3.3) and a number of turns forming sensor heads between two input sides (3.3), for a different level (19); the corresponding support and guidance element (4) bending the fiber (3, 3.3, 3.4) in turns forming sensor heads of a small radius r around at least one corresponding guideway (4.3). |
