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I. Electromagnetic flowmeters have requirements regarding the straight pipes before and after installation, although these requirements are lower than those for other types of flowmeters. The most important requirement to be met is that the pipe must be filled to capacity. A lack of proper regulation can easily cause the flow meter to fluctuate erratically. II. The measurement range of electromagnetic flowmeters is limited. When ordering such devices, many users compare them with water meters, thinking that they can measure very low flow rates. In fact, the size of the flowmeter should not be determined based on the original diameter of the pipeline; it is better to choose the appropriate size according to the actual flow rate. III. Electromagnetic flowmeters also have protection ratings; if the user has specific requirements regarding the installation environment, and the installation location is in an underground shaft or some other humid area, it is recommended that the user opt for a split-type model. To avoid making the wrong choice and causing damage to the instrument. IV. Electromagnetic flowmeters can be used to measure corrosive liquids, but at the time of placing an order, users must provide the correct name of the fluid as well as its properties, in order to avoid mistakes in selecting the electrode material. Such mistakes could lead to the sensor becoming unusable over time, causing inconvenience and financial losses for the user. V. Although electromagnetic flowmeters have good reliability and generally do not get damaged, due to their operating principle, the sensor electrodes are in constant contact with the liquid; over time, the surface of these electrodes is prone to contamination. Therefore, under normal operating conditions, if the user has the means to do so, it is recommended to remove the electrodes and clean them every one to one and a half years in order to maintain the measurement accuracy of the entire flow meter. All instruments require maintenance, and electromagnetic flowmeters are no exception.