| 摘要 |
PROBLEM TO BE SOLVED: To obtain a liquid-level meter by which a measuring part can be installed inside a tank and by which a liquid level can be measured without using a glass gage. SOLUTION: In a liquid-level meter, the liquid surface level of a liquid inside a tank is measured optically. In the liquid-level meter, a longitudinally long opening 2 is arranged and formed in one face of the sidewall of a case 1 which is installed inside the tank, and a light-emitting body 3 and a light-receiving body 4 are erected and installed inside the case 1 so as to face the opening. The light-emitting body 3 is constituted so as to be provided with (n) pieces of light-emitting elements 3-1 to 3-n which are arranged and installed continuously in the vertical direction, and the light-receiving body 4 is constituted so as to be provided with a plurality of photodetectors corresponding to the light- emitting elements 3-1 , to 3-n . The light-emitting elements 3-1 to 3-n are controlled by a computing and processing part 5 so as to emit light sequentially, the liquid surface level inside the tank is computed on the basis of the output of the light-receiving body, and a computed result is displayed on a display part 7. |
