It is used in laboratory, University experiment, calibration of pressure (differential pressure) transmitter, precision pressure gauge, ordinary pressure gauge, sphygmomanometer and other pressure instruments. It is required by measurement and detection standards in various industries. Instead of pointer precision pressure gauge, it can be used as standard pressure gauge, which is easy to install and use. The shell has 316 stainless steel structure, good sealing, anti vibration, stable and reliable performance.