Why can't magnetic inductive flowmeters measure gases?

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The working principle of magnetic inductive flowmeter is based on Faraday's law of electromagnetic induction. When a conducting medium flows through a magnetic field, a voltage is produced that is proportional to the flow rate. Therefore, magnetic inductive flowmeters are mainly used to measure the flow of conductive liquids, such as water, acid, alkali, salt solution, slurry, mud, etc.

Gas is usually non-conductive or has extremely poor conductivity, so it cannot generate enough electromotive force for detection by the magnetic inductive flowmeter. In addition, the density and compressibility of gases are also very different from liquids, which makes the design and calibration of magnetic inductive flowmeters difficult to apply to gas measurements. For example, the flow rate of gas is greatly affected by temperature and pressure, and complex compensation is required to obtain accurate measurement results.

Therefore, although in theory the principle of magnetic inductive flowmeter does not exclude any conductive medium, in practical applications, magnetic inductive flowmeter is not suitable for gas flow due to the low conductivity of gas and other measurement challenges. Measurement. For gas flow measurement, other types of flow meters are usually used, such as V-cone flow meters, thermal mass flow meters, ultrasonic flow meters, etc. These flow meters are specifically designed to measure gas flow and can better adapt to the physical properties and measurement requirements of the gas.