| 摘要 |
PROBLEM TO BE SOLVED: To provide a pressure display unit capable of attaining simplification and an efficiency increase of a pressure display in a vessel. SOLUTION: Pressure detecting sheets 2 to 4 are supported by a set of supports 5 in the vessel 1, and detect and display pressure in the vessel 1. The pressure detecting sheet 2 changes to red from transparency when the pressure in the vessel 1 becomes a lower limit value or less, and changes to orange from the transparency when the pressure in the vessel 1 becomes an upper limit value or more, and changes to yellow from blue when the pressure in the vessel 1 becomes a reference value or less. A color changing state of the respective these pressure detecting sheets 2 to 4 can be seen from a window 6 arranged in one place.
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