| 摘要 |
PROBLEM TO BE SOLVED: To judge the relative position of a reed switch that is an essential part of the internal sensor part of a level sensor set within a coolant tank of a refrigeration cycle or the like with a float without using a jig or measuring device. SOLUTION: A mark 7 showing the relative positional relation between the reed switch 1 and the float 4 is provided on the circumferential surface of a bottomed tubular body 3.
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