| 摘要 |
PURPOSE:To know the height of a liquid by an arrangement position of each optical fiber and to display numerically a prescribed temperature at the same time, by displaying by a temperature display device distinguishing the part where the light is detected from that where the light is not detected in a light-electricity transducer. CONSTITUTION:An exposed sensor part 3 is disposed to a material to be measured or its surroundings and light from each optial fiber is irradiated to each lens part 4 by a operating a luminous element part 10. The light passing through the part 4 is transmitted from the one side face to the other side face of a vessel 2 turning into a parallel light and is made incident to each fiber 7 as it is at the part where liquid 1 is present and then reaches a photodetecting element part 12. But, said light reaches the part 12 decreasing the light quantity at the part where the liquid 1 exists. Consequently, the height of the liquid 1 shown by the arrangement position of the optical fiber is known by distinguishing the part detecting the light from that or not detecting the light and displaying on a temperature display device 14 at a light-electricity conversion part 13 and a prescribed temperature is displayed numerically basing on its height. |
