| 摘要 |
PROBLEM TO BE SOLVED: To provide a sensor for liquid capable of being post-attached with a low cost.SOLUTION: A flow sensor 50 includes a vane wheel 2 rotating around a rotation axis 1 and can insert the vane wheel 2 from an opening hole 23 of a pipe 22 so that the rotation axis 1 crosses against a flow direction of liquid flowing in the pipe. |
