DN50 electromagnetic flowmeter price

The price of DN50 electromagnetic flowmeter is similar to that of ordinary electromagnetic flowmeter, and the main price determining factor is its manufacturing process and quality. Of course, the main thing is the manufacturer's service and strength. As an industrial product, the installation of electromagnetic flowmeter is also very important.　　 Let me talk about the development of electromagnetic flowmeters. Electromagnetic Flowmeters (EMF) is a new type of flow measurement instrument that developed rapidly with the development of electronic technology in the 1950s and 1960s. Electromagnetic flowmeter is an instrument that uses the principle of electromagnetic induction to measure the flow of conductive fluid based on the electromotive force induced when the conductive fluid passes through an external magnetic field.　　Electromagnetic flow transmitter-sensor working principle　　The working principle of DN50 electromagnetic flowmeter is based on Faraday's law of electromagnetic induction. This means that when a charged conductor passes through a magnetic field and cuts the magnetic field lines, it will generate induced electromotive force on both sides of the pipe. The electromagnetic field is generated by the current flowing through the coil outside the measuring tube. The magnitude of the induced voltage is directly proportional to the speed and the conductivity of the conductor, the diameter of the pipe, and the strength of the magnetic field. Specifically, we can express Faraday's law as E u003d K × B × D × V, where V represents the velocity of the conductive fluid , B represents the magnetic field strength, D represents the diameter of the measuring pipe section, E represents the voltage on the electrode, and K is a constant. B, D, and K can be fixed values, so the equation is simplified to the proportional relationship between E and V.　　 Most electromagnetic flow meters use low frequency square waves to excite the sensor coil. It can be 1/25, 1/16, 1/10 or 1/4 grid frequency, and half the grid frequency. The amplitude of the low-frequency square wave excitation is unchanged, but the direction of the current flowing in and out of the coil is changed.　　Sensor signal conditioning-analog front-end common-mode rejection ratio 　　common-mode voltage must be suppressed by the electromagnetic flowmeter converter, and the analog front-end circuit plays the most important role in it. If the circuit has a common-mode rejection ratio of 120 decibels, the 0.28V common-mode voltage can be reduced to 0.28 μV, and if the common-mode rejection ratio is 100 dB, the rejection is 2.8 μV.　　Electromagnetic flowmeter-signal processing circuit architecture comparison　　 Although the specific implementation may be different, the sensor signal processing of the electromagnetic flowmeter can be divided into two main methods: analog synchronous demodulation and digital oversampling.　　Analog demodulation is a traditional method, but it is still widely used in the industry today. It usually uses preamplifiers, bandpass filter amplifiers, sample-and-hold, synchronous demodulation, analog-to-digital converters and microcontrollers.　　 shows the signal chain of a typical analog synchronous demodulation circuit. The microvolt or millivolt level signal output by the sensor is first amplified by an integrated instrumentation amplifier or an instrumentation amplifier built with discrete devices.　　 The above is also the main determinant of the price of DN50 electromagnetic flowmeter. However, I personally feel that the price of DN 50 electromagnetic flowmeter is not only related to its principle but also its manufacturing process, material selection and after-sales service. Generally, good electromagnetic flowmeter manufacturers pay great attention to product quality, manufacturing process, and material selection. Better electromagnetic flowmeter manufacturers are in place in terms of service. Set up offices nationwide!

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