Working principle of electromagnetic flowmeter

Project Overview

Electromagnetic flowmeter is a commonly used flow measuring instrument used to measure the flow of conductive liquids. Its working principle is based on Faraday's law of electromagnetic induction and determines the flow rate of the fluid by measuring the electromagnetic induced electromotive force in the liquid.

This flow meter consists of two parts: the main body and the sensor. The main body contains an electromagnetic coil and a display for processing and displaying measurement data. The sensor is installed inside the pipe and is driven by the flow of fluid to induce electromotive force.

In operation, liquid flows through the pipe and passes through the sensor's magnetic field. The conductivity in a fluid makes it a conductor of electricity. When a fluid passes through a magnetic field, an electromotive force is generated that is proportional to the fluid's velocity. This electromotive force increases with the velocity of the fluid and is therefore related to the flow rate of the fluid.

The electromagnetic flowmeter determines the flow rate of the fluid by measuring this induced electromotive force, and calculates the accurate flow value. Because its measurement is not affected by factors such as fluid density, temperature, pressure, etc., it is widely used in industrial and municipal fields.

Although the working principle of electromagnetic flowmeter is relatively simple, it is widely used and is especially suitable for long-term stable monitoring of liquid flow. It has the advantages of fast response, high accuracy and low maintenance cost, so it has become an indispensable part in the field of modern flow measurement.