The measurement of ring chamber integrated orifice plate has the characteristics of stability, reliability, high measurement accuracy and improving the sealing effect. It is convenient to install and maintain, and can be directly connected to the intelligent differential pressure transmitter and pressure transmitter. It can realize self-diagnosis function and complete self-programming adjustment. It can display the accumulative flow, instantaneous flow, pressure and temperature at the same time. Besides online and dynamic full compensation function, it also has the functions of self-diagnosis and self-setting measuring range. It is equipped with a variety of communication interfaces.