| 摘要 |
To easily change internal pressure of a container according to a change in external pressure. In a strain gauge device 100, a piston 54 attached to a tubular opening portion 53A provided at a housing part 53 slides in response to external pressure. Thereby varying the volumes of a regulator oil containing region 52 and a sensitive region 15 so 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 region 52 and the sensitive region 15 are changed according to a change in external pressure only by sliding of the piston 54, it is possible to easily perform regulation of the internal pressure. Further, because the above-described pressure balance mechanism 51 is 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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