| 摘要 |
PROBLEM TO BE SOLVED: To provide a practical moisture sensor capable of correctly measuring a moisture amount.SOLUTION: A swelling material holding part 22 has a cross-sectional recess housing part 23, a large number of through-holes 24 are formed on a bottom part of the housing part 23 or (and) on a peripheral wall, a swelling material 25 is filled into the housing part 23, an opening of the housing part 23 is closed by a membrane 26, and an opening of a casing 21 housing a pressure sensor 27 therein is closed by the swelling material 25 and the swelling material holding part 22 with the membrane 26. |
