| 摘要 |
PROBLEM TO BE SOLVED: To provide a manometer, a level meter, and an alarm system which can exert excellent detection accuracy.SOLUTION: A level meter 1 includes: an outer packaging part 8 having an interior space S2 into which liquid L flows; a pressure sensing part 3 which is provided in the outer packaging part 8, which faces the interior space S2, and which detects a hydraulic pressure of the liquid L; and a plurality of holes 511 which are provided to the outer packaging part 8, which communicate between the inside and outside of the interior space S2, and each of which has a curved portion between one opening and the other. At least two of the holes 511 communicate with each other inside a wall of the outer packaging part 8. |
