Does the liquid measured by the electromagnetic flowmeter need to be conductive?

The liquid measured by the electromagnetic flowmeter can be either conductive liquid or non-conductive liquid.

Famet Electromagnetic Flowmeter

1. Working Principle of Electromagnetic Flowmeter

Electromagnetic flowmeter is an instrument that uses the conductivity of liquid to measure liquid flow based on Faraday's law of electromagnetic induction. It mainly consists of measuring tube, electrode, electromagnetic coil, signal converter and other parts. The electromagnetic coil is one of the key components. The alternating magnetic field generated by the electromagnetic coil can penetrate the measuring tube and penetrate into the liquid through the electrode. When the liquid flows, an electromotive force is induced on the electrode. According to Faraday's law of electromagnetic induction, the flow rate of the liquid can be obtained.

Famet Electromagnetic Flowmeter

2. Application Scope of Electromagnetic Flowmeter

Due to the working principle of the electromagnetic flowmeter, the liquid measured by the electromagnetic flowmeter needs to have a certain conductivity. However, not all liquids have the ability to conduct electricity. Some non-conductive liquids such as oil, crude oil, natural gas, etc. have very low conductivity and are difficult to measure with electromagnetic flowmeters. But now there are some electromagnetic flowmeters suitable for non-conductive liquids on the market. These electromagnetic flowmeters have been improved in the structure of the electromagnetic coil and electrodes, improving the accuracy of the electronic signal, so that they can measure non-conductive liquids.

At the same time, different types of electromagnetic flowmeters also have differences in their applicable scopes. Some electromagnetic flowmeters specially used to measure acidic liquids or corrosive liquids need to use corrosion-resistant materials to make electrodes and measuring tubes. Other electromagnetic flowmeters suitable for high-temperature, high-pressure liquids or high-viscosity liquids need to add a pressure reducing device or a viscosity correction instrument. 3. Summary Through the above introduction, we can conclude that the liquid measured by the electromagnetic flowmeter can be conductive liquid or non-conductive liquid, but the conductivity of the liquid has a great influence on the measurement accuracy of the electromagnetic flowmeter. When choosing an electromagnetic flowmeter, you need to make a selection based on the characteristics of the liquid being measured and the requirements of the application environment.