| 摘要 |
PROBLEM TO BE SOLVED: To provide a pressure control unit with a bag capable of suppressing deterioration of the bag due to expansion and contraction without causing sharp cost increase, and further preventing scratch which may occur in expansion and contraction resulting from such deterioration, and an environmental test device.SOLUTION: An environmental test device 1 includes: a device body 3 which has a test tank 5; and a pressure control unit 2 which communicates with the test tank 5. The pressure control unit 2 has a bag part 14, and the bag part 14 is dual structure having an inner bag body 27 which expands and contracts by following pressure fluctuation in the test tank 5, and an outer bag body 28 which covers the outside of the inner bag body 27. |
