Each sterilizing pot should be installed with a clear reading of the pressure gauge, the instrument diameter should be ≥100 mm, to facilitate the operator observation, the working pressure index value should be in actual sterilization and cooling required to determine the working pressure, usually to control the temperature of the working pressure pointer in the indicator area of the index value of the middle position is better, so the most easy to see the work When the pressure changes, at the same time also prevent because of a flash of work when the pressure becomes large damaged pressure gauge pointer.