LDE Smart Electromagnetic Flow Meter

Product Overview

LDE Smart Electromagnetic Flow Meter is based on Faraday's law of electromagnetic induction. It is used to measure the volumetric flow of various conductive liquids or liquid-solid two-phase media such as acid, alkali, salt solutions, pulp, and slurry. It can be used with display, totalizer, and control devices for detection, totalization, and control. The measuring tube has no obstruction or moving parts, almost no additional pressure loss, and the sensor has a long service life. It is not suitable for non-conductive liquids, gases, or steam.

Measurement Principle

When a conductive fluid flows at an average velocity V through a measuring tube with inner diameter D placed in a uniform magnetic field with magnetic induction intensity B, an induced electromotive force E = B·D·V is generated on a pair of electrodes perpendicular to the magnetic field and flow direction. Since the volumetric flow rate is proportional to the electromotive force, the flow rate can be obtained by measuring the electromotive force between the electrodes. The measurement accuracy is not affected by changes in fluid density, viscosity, temperature, pressure, or conductivity.

Structure and Performance

The converter uses low-frequency rectangular wave excitation, providing good stability and low power consumption. A 16-bit microprocessor handles all-digital processing, and the turndown ratio can reach 50:1. It features a backlit Chinese LCD display with full Chinese character menu. Only the inner lining and electrodes of the sensor contact the medium; by selecting suitable lining and electrode materials, corrosion and wear resistance can be achieved.