Water level gauge, water level detection system and water level detection method

摘要

PROBLEM TO BE SOLVED: To allow detection error of water level due to change in the installation angle of a water level gauge to be suppressed in the water level gauge, a water level detection system, and a method for detecting a water level.SOLUTION: A capacitance type water level gauge installed on a slope inclined to a horizontal plane includes: a first water level sensor which is cylindrical and is provided on a horizontal plane and a plane perpendicular to the slope so as to extend along the slope; and a second water level sensor which is cylindrical and is provided on the perpendicular plane, at a prescribed distance from the first water level sensor on the perpendicular plane, and in parallel with the first water level sensor. The first and second water level sensors measure a liquid level independently of each other, and at the position of some liquid level, both of the first and second water level sensors measure the liquid level and output respective signals indicating measured liquid levels.