PROBLEM TO BE SOLVED: To provide a bathometer having high reliability without being broken even under a high water pressure.SOLUTION: The bathometer is provided by installing an air-accumulating chamber at the endmost part 13a of an air chamber 13 of the bathometer and making it have a communicating state with the air chamber, also installing an opened-up window 15 at its body, and linking the air-accumulating chamber with the body to expose the air-accumulating chamber under water. As the flexible plate 16a of the air-accumulating chamber, a material having a form such as a disk or bellows and rich in flexibility is suitable. Additionally, to the flexible plate 16a, reserve tension is given. The volume of the air-accumulating chamber is made to have a minimum value by making the chamber always closely stick to a base stand with the restoring force of the material itself.COPYRIGHT: (C)2012,JPO&INPIT【課題】高水圧下においても破損しない信頼性の高い水深計を提供する。【解決手段】水深計の空気室の最端部13aに空気溜り室を設け空気室13と導通状態にしておく。本体に開放マド15を設け、空気溜り室を水中に晒すよう空気溜り室を本体に結合する。この空気溜り室の伸縮板16aには、円盤やベローズのような形状でフレキシブル性に富んだ材料がよい。そして伸縮板16aには予備張力を与えておく。材料自身の復元力で常に基台に対し密着するようにし空気溜り室の容量を最小値にしておく。【選択図】図1
