Anti-corrosion electromagnetic flowmeter working principle

Case introduction

　　The measuring principle of BS-ELD series anti-corrosion electromagnetic flow meter is based on Faraday's law of electromagnetic induction. The measuring tube of the flowmeter is a short non-conductive alloy tube lined with insulating material. The two electrodes are fixed on the measuring tube through the wall of the tube in the direction of the tube diameter. Their electrode heads are essentially flush with the inner surface of the lining. When the excitation coil is excited by a double square wave pulse, a working magnetic field with a magnetic flux density of B is generated in the direction perpendicular to the axis of the measuring tube. At this time, if a fluid with a certain conductivity flows through the measuring tube. Will cut the magnetic line of force induced electric potential E. Electric potential E is proportional to the magnetic flux density B, measuring tube diameter d and the average flow velocity v product. The electromotive force E (flow signal) is detected by the electrodes and sent via cable to the converter. The converter amplifies and processes the flow signal to display the fluid flow and can output signals such as pulses, analog currents, etc. for flow control and regulation.

　　The main components of the sensor are: measuring tube, electrode, excitation coil, iron core and yoke shell. It is mainly used to measure the volume flow in conductive liquids and slurries in closed pipes. Including acid, alkali, salt and other strong corrosive liquids. The product is widely used in petroleum, chemical, metallurgy, textile, food, pharmaceutical, papermaking and other industries as well as environmental protection, municipal management, water conservancy construction and other fields.

　　Anti-corrosion electromagnetic flowmeter features:

　　1. Measurement results have nothing to do with flow rate distribution, fluid pressure, temperature, density, viscosity and other physical parameters.

　　2. 16-bit embedded microprocessor, fast computing speed, high precision, programmable frequency low-frequency rectangular wave excitation, improving the stability of flow measurement, low power consumption.

　　3. High-definition backlit LCD display, full Chinese menu operation, easy to use, simple operation, easy to learn and understand.

　　4. Internal with three accumulators can be displayed separately positive cumulative amount and the difference between the cumulative amount, internal with a non-power-down clock, can record 16 times the power-down time.

　　5. SMD devices and surface mounting (SMT circuit is highly reliable).

　　6. There are no moving parts in the pipeline, no flow resistance parts, and almost no additional pressure loss in the measurement.