Influence of medium conductivity on electromagnetic flow meter

Abstract: The information on the influence of medium conductivity on electromagnetic flowmeters is provided by excellent flowmeter and flowmeter manufacturers. The electromagnetic flowmeter is made according to the principle of Faraday's electromagnetic induction. It has unique measurement advantages in measuring conductive liquids. Let's talk to you in detail with the technology of Shunda flowmeter, about the influence of medium conductivity on electromagnetic flowmeter. . . More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the details of the article on the influence of medium conductivity on electromagnetic flowmeters. The electromagnetic flowmeter is made according to Faraday's electromagnetic induction principle, and has unique measurement advantages in measuring conductive liquids. The following flowmeter technology will talk to you in detail about the influence of medium conductivity on electromagnetic flowmeters. At present, the input impedance of the electromagnetic flowmeter conversion circuit has been greatly improved. When measuring conductive liquids, there is usually no error caused by the change of the conductivity of the medium. However, for a certain input impedance of the converter, the conductivity of the measured medium has an The lower limit value, which cannot be lower than the lower limit value. It is not suitable for the conductivity of the measured medium to be too large. For example, when the conductivity exceeds about 10-1 (S/cm), the flow signal will be reduced and the indicated value will be changed, that is, the indicated flow value is smaller than the actual flow value. This is because in the electromagnetic flow transmitter, the magnetic field is of finite length, and the measured conductive liquid can only generate the induced electromotive force e when it flows through the finite magnetic field. Therefore, the induced electromotive force e representing the flow signal is the result of the magnetic field line being cut by the conductive liquid in the magnetic field, and the conductive liquid other than the two ends of the magnetic field does not make any contribution to e. On the contrary, because they are also connected to the two electrodes, they also constitute a part of the external circuit. When the transmitter and the converter are connected together, this part of the external circuit is connected in parallel with the input impedance of the converter and becomes the load of the transmitter. When the conductivity of the measured medium is large, the resistance of the external circuit is small, no matter how high the input impedance of the converter is, the parallel result will depend on this part of the liquid external circuit, thus reducing the need for the transmitter and the converter. transmission accuracy between the devices. Therefore, for the electromagnetic flowmeter, there is a certain range that is not affected by the conductivity of the medium, and the conductivity string of the measured medium can neither be too large nor too small. With the development of electronic technology and the improvement of the input impedance of the converter, the lower limit of the conductivity of the measured medium will definitely be lowered. The above is about the influence of medium conductivity on the measurement of electromagnetic flowmeter, hoping to provide some help in the use process. If you have other questions or needs about the flowmeter, you can contact the flowmeter manufacturer and we will serve you wholeheartedly. After more than ten years of development, the flowmeter manufacturer has always been based on honest operation, customer demand first, and quality assurance as the priority. Continuous efforts are made to develop new technologies, improve product performance, use high-quality materials, and be meticulous about product quality, which is why it has been well received by customers. All my colleagues look forward to flying with you. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Influence of medium conductivity on electromagnetic flow meter'
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