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An electromagnetic flowmeter is primarily a flow measurement instrument that operates based on the law of electromagnetic induction; it utilizes embedded technology for digital excitation, and the usage techniques related to such flowmeters have reached an advanced level. An electromagnetic flowmeter measures flow rates by means of electromagnetic induction. It has many advantages; the most significant one is its extremely low pressure loss, and it is capable of measuring flows over a very wide range. Electromagnetic flowmeters are primarily used in industrial applications. They are capable of generating specific signals, and the flow rate measured by them is linear in nature; moreover, they offer high accuracy during measurement. They can also be used to measure solutions with conductivity, such as acids, bases, and salts. However, they have certain limitations – they cannot measure the flow rate of gases or pure water. When an electromagnetic flowmeter moves along the magnetic field lines, it generates a corresponding induced electromotive force. The magnitude of this induced electromotive force depends on the perpendicular movement within the magnetic field, and it is also proportional to the direction in which the magnetic field is moving. The direction of the induced electromotive force can be determined using the right-hand rule; by mastering certain rules, it becomes possible to carry out accurate measurements. The working principle of an electromagnetic flowmeter is relatively simple, but it actually constitutes the core foundation for its operation. Flow meters can also be divided into float flow meters and purge flow meters, and each of these types of flow meters has its own characteristics.