What are the advantages of electromagnetic flowmeter?

Case introduction

Characteristics of electromagnetic flowmeters Compared with other flow measurement instruments, electromagnetic flowmeters have the following outstanding advantages.

(1) Simple structure, no moving parts and no obstacles to the measurement Disturbance parts or throttling parts for medium flow. Therefore, when the fluid passes through, it will not cause any additional pressure loss, saving energy and reducing consumption. At the same time, it will not cause problems such as wear and blockage. It is especially suitable for measuring liquid-solid two-phase fluids such as slurry with solid particles and sewage. , and various viscous slurries, etc.

(2) Only the lining and electrodes are in contact with the medium. By selecting the corrosion-resistant insulating lining and corrosion-resistant electrodes, it can be used for the measurement of various corrosive media.

(3) The electromagnetic flowmeter is an instrument that measures volume flow. Its measurement is not affected by changes in the density, temperature, pressure, viscosity, Reynolds number and conductivity of the fluid within a certain range. The electromagnetic flowmeter only needs water as the experimental medium for calibration, and can be used to measure other conductive liquids without additional corrections. This is an advantage that other flow meters do not have.

(4) Large range ratio. For the same caliber sensor, the full-scale flow rate can be set arbitrarily within the range of .03 to 15 s. The measurement range of the electromagnetic flowmeter can cover two velocity distribution states, turbulent flow and laminar flow, which cannot be compared with differential pressure flowmeters, turbine flowmeters, vortex flowmeters and other flowmeters.

(5) The measurement principle is linear, with high measurement accuracy, complete electrical signal output, no mechanical inertia, sensitive response, and can measure pulsating flow and rapid accumulation of total volume.

(6) In principle, the average flow velocity of the water cross section is measured. The signal is integrated according to the weight distribution, and the requirements for the flow velocity distribution are low. Therefore, the straight pipe section before and after the sensor is required to be shorter than other flow meters.