DEVICE FOR MEASURING FLOW RATE, OPERATING ON PRINCIPLE OF DIFFERENTIATED PRESSURE, WITH RESERVE PRESSURE SENSORS TO DETECT FAILURE OF SENSORS AND REDUCED EFFICIENCY Russian patent published in 2016 - IPC G01F25/00 

FIELD: measuring equipment.

SUBSTANCE: invention relates to systems for controlling and monitoring of process of production of such type, which is used to measure and control production processes. In particular, present invention relates to measurement of flow rate in production processes based on principle of differential pressure. System 100 for process fluid flow rate measurement in process pipeline 102 comprises flow limiter 108 in process pipeline creating differential pressure between input side of limiter 108 and outlet side of limiter 108. Differential pressure depends on process fluid flow rate. Primary and secondary pressure meters at inlet 104C, 104D are connected with process pipeline 102 at input side of flow limiter 108 and measure primary and secondary pressure at inlet. Primary and secondary pressure meters at the output 104A, 104B are connected with process pipeline 102 on outlet side of the flow limiter 108 and measure corresponding primary and secondary pressure at process fluid outlet. Process fluid flow rate is calculated based on at least one inlet and one outlet pressure.

EFFECT: creation of method and device for measuring differential pressure, at same time providing diagnostic data, which can be used for detecting faulty sensor.

25 cl, 3 dwg