Japan Agency for Marine-Earth Science and Technology

Eiichiro Araki

Kazuo Furuya

Hisao Ito

To easily change internal pressure of a container according to a change in external pressure. In a strain gauge device, a pistonattached to a tubular opening portionA provided at a housing partslides in response to external pressure. Thereby varying the volumes of a regulator oil containing regionand a sensitive regionso as to achieve a balance with the external pressure, to change the internal pressure. Then, in the above-described strain gauge device, because the internal pressures of the regulator oil containing regionand the sensitive regionare changed according to a change in external pressure only by sliding of the piston, it is possible to easily perform regulation of the internal pressure. Further, because the above-described pressure balance mechanismis achieved with a simple configuration, it is possible to easily perform regulation of the external pressure and the internal pressure even in a high-temperature/high-pressure environment.

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Yokosuka, Japan

Eiichiro Araki