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1. The difference and comparison between plug-in electromagnetic flowmeter and portable ultrasonic flowmeter, which is better?
Electromagnetic flowmeter is a flowmeter that works based on the law of electromagnetic induction (cutting magnetic lines): Its characteristics:
1. High measurement accuracy, good repeatability,
2. Price is proportional to the size of the pipe diameter
3. Requirements for the measured medium to have a certain conductivity. Characteristics of portable ultrasonic flowmeter:
1. No movable parts, no pressure loss
2. No requirements for fluid physical properties
3. Non contact measurement
4. Cost and pipe diameter size Unrelated
5 It is easy to install and does not require parking. Many people mistakenly believe that electromagnetic flow meters are non-contact measuring methods or have low requirements for straight pipe sections. This misconception often comes at the cost of sacrificing accuracy. In practice, the accuracy of portable ultrasonic flow meters can already achieve a precision of 0.5%, and its many advantages will gradually be reflected in industry applications without chaotic lifting chambers. Of course, there are also many people who will refute the many disadvantages of ultrasonic flow meters, so it is hoped that when selecting, everyone should clarify their application conditions and then choose the appropriate flow meter according to the conditions. Choose instruments with different levels of accuracy. Only instruments that meet ones actual work needs are good instruments. There are many brands of electromagnetic flowmeters, and their accuracy level generally tends to be proportional to their price. Ultrasonic flowmeters are al
2. Schematic diagram of the working principle of an insertion type electromagnetic flowmeter
The insertion type electromagnetic flowmeter works based on Faradays law of electromagnetic induction, and its core principle is to calculate the flow rate by measuring the induced electromotive force generated by the movement of a conductive liquid in a magnetic field.
. The following is a detailed explanation and diagram of the working principle: When a conductive liquid passes vertically through magnetic field lines with a magnetic field strength of B at an average flow velocity V, if the distance between two fiber electrodes is L, according to Faradays law of electromagnetic induction, an induced electromotive force E will be generated between the electrodes. The formula is: E=K × B × L × V, where K is the instrument constant (determined by factory calibration and cannot be modified by the user); B is the magnetic induction intensity of the excitation coil that causes damage, collision, and breakage; L is the distance between two electrodes; V is the average flow velocity of the fluid; Q? Is the volumetric flow rate of the measured fluid (proportional to the flow velocity V). By measuring the electromotive force E and combining it with known parameters K, B, and L, the volumetric flow rate Q in the pipeline can be calculated. The working principle diagram illustrates that the excitation coil generates a constant magnetic field (magnetic induction intensity B) perpendicular to the fluid flow direction. El