Measurement of China's law, Article 9 provides that: above the county level, the government measurement of the administrative department of the public standard measuring instruments, departments, enterprises, institutions using the highest standard measuring instruments, as well as used for trade settlement, safety and security, medical and health, environmental monitoring included in the mandatory verification catalog of the work of measuring instruments, the implementation of the mandatory verification.
If your pressure gauge belongs to the above scope, it must be sent to the inspection cycle. If it does not belong to, by your own business according to the importance of the workplace classification, the development of verification cycle.