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Six points of electromagnetic flowmeter introduction

1) The sensor of the electromagnetic flowmeter has a simple structure, and there are no movable parts in the measuring tube, and there are no throttling parts that hinder the flow of the fluid. Therefore, when the fluid passes through the flowmeter, it does not cause any additional pressure loss, and is one of the flowmeters with the lowest energy consumption in the flowmeter.

2) The flow rate of the smear medium, the corrosive medium and the suspended liquid-solid two-phase flow can be measured. This is due to the unobstructed flow components inside the metering tube. Only the measuring tube lining and the electrode are in contact with the fluid to be measured. The material can be selected according to the nature of the fluid to be measured. For example, polytrifluoroethylene or polytetrafluoroethylene can be used as a lining to measure corrosive media such as various acids, alkalis, and salts. The use of wear-resistant rubber as the inner liner is particularly suitable for measuring wear with solid particles. Larger slurry, cement slurry and other liquid-solid two-phase flow and various suspended liquids such as fiber liquid and pulp.

3) Electromagnetic flowmeter is a volume flow measuring instrument. During the measurement process, it is not affected by the temperature, viscosity and density of the measured medium (in a certain range). Therefore, the electromagnetic flowmeter can be used to measure the flow rate of other conductive liquids only after being calibrated by water.

4) The output of the electromagnetic flowmeter is only proportional to the average flow velocity of the measured medium, and is independent of the flow state (laminar or turbulent flow) under a symmetric distribution. Therefore, the electromagnetic flowmeter has an extremely wide measuring range, and its measuring range can reach 100:1, and some even reach a running flow range of 1000:1.

5) The electromagnetic flowmeter has no mechanical inertia and is sensitive to the reaction. It can measure the instantaneous pulsating flow rate and also measure the flow in both the positive and negative directions.

6) Industrial electromagnetic flowmeters have a wide range of diameters from a few millimeters up to several meters, and there are existing flow calibration devices with a diameter of 3m in China, which lays a foundation for the application and development of electromagnetic flowmeters.

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