| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a abnormality alarming technology for a water vapor transfer-controlling apparatus which can confirm abnormality from the outside of a box when waterproof membrane is clogged and especially the abnormality of the apparatus installed in a high place such as a steel tower easily from the ground. SOLUTION: A cylinder 30 to be fitted to a box 2 so that the upper end opening 31 is opened to the inside of the box 2, and the lower end opening 32 is opened to outside air is provided, an airtight accumulator 33 is installed in the cylinder, the lower end opening part 34 of the accumulator is fitted airtightly to the inner circumference of the cylinder, an alarm mark member 38 with the tip attracted to the cylinder by magnets 36, 37, which falls from the cylinder by its own weight to be suspended from the cylinder to be exposed when the attraction by the magnets is eliminated is installed in the accumulator.</p> |
