The type selection of pressure gauge of air separation unit must be based on practical application. On the premise of reaching the process production conditions and technology, the principle of saving should be fully considered to reasonably select the model, range and accuracy level. Sometimes other devices, such as alarms and remote transmission, need to be considered. There are three main factors to be considered: first, the requirements of pressure measurement in the process of technical production; second, the nature of the measured medium; third, the site environmental conditions.
