| 摘要 |
PROBLEM TO BE SOLVED: To provide a structure for surely and airtightly sealing a unit board of a sensor unit integrated in a sensitive flow meter for detecting water leakage or the like, and a wiring part for connecting to the outside led out from the unit board. SOLUTION: An enclosure 23 for a sensor board, which houses the sensor board 21 of the sensor unit 8 in airtightly sealed condition, is formed by using three pieces of O-rings 31, 32, 33 in a housing of the flowmeter 1. The wiring 22 for connecting to the outside led out from the sensor board 21 is led out to the outside through a drive pipe 26 driven and fixed into through holes 24, 25 formed after assembling. It is, therefore, possible to realize the structure for surely and airtightly sealing the sensor board 21 and the wiring part for connecting to the outside.
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