| 摘要 |
PROBLEM TO BE SOLVED: To provide a waterproof structure for planar pressure sensor capable of preventing the invasion of water on a molecule level. SOLUTION: This pressure sensor comprises an air bag 2 made of a material without air permeability and bendable by letting air out of an air vent 14 when a pressure is applied and cells disposed at fixed intervals in the air bag 2 to detect pressure by a change in a current passing therethrough caused by their making contact with each other, The air vent 14 is provided with an air pressure adjustment means 6 capable of absorbing a pressure difference between the air pressure in the air bag 2 and the atmospheric pressure and not transmitting water on a molecule level to the interior of the air bag.
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