The compulsory verification of process pressure gaugesincludes the following 7 categories:

a. Measurement of boiler main cylinder and feed water pressure parts;

b. Measurement of pressure of fixed air compressor air chamber and main pipe;

c. Measurement of generator and gas turbine oil pressure and locomotive pressure;

d. Pressure measurement of medical autoclaves and autoclaves;

e. Pressure measurement with alarm device;

f. Measurement of pressure of sealed pressurized container;

g. Pressure measurement of harmful, toxic, and corrosive media. (Such as: spring tube pressure gauge, electric remote transmission and electric contact pressure gauge).