The impact of corrosive media on flow meters

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　　Flow meters are precision measuring instruments. What effects can corrosive media have on them? Let’s take a look: 1. The key components of flow measurement instruments undergo corrosion by corrosive media over time, which changes their geometric dimensions and thus reduces the accuracy of the instruments. 　　For example, in a vortex flow meter, if the vortex generator is corroded by the fluid, its width decreases and the surface facing the flow becomes rougher, which in turn causes a change in the flow coefficient. Even plug-in ultrasonic flowmeters, which are less affected by corrosive media, often experience weakened transmission and reception signals due to the pitted inner surface of the metal pipe caused by corrosion, and in severe cases lose their sensitivity. 　　2. Corrosive media can cause corrosion of the key components of flow measurement instruments that are in direct contact with the medium, leading to their damage and even loss of functionality. For example, corrosion of the electrodes in an electromagnetic flowmeter can lead to leakage of the medium, which in turn causes the outer layer of the excitation wire to burn out. 　　3. Corrosion can have a significant impact on the lifespan of instruments; if not addressed, it can cause some measuring instruments to lose their functionality prematurely. For example, in some special situations, using corrosion-resistant materials throughout is too costly; therefore, corrosion-resistant materials are used for the critical measuring components, while process connections such as flanges are made of ordinary corrosion-resistant or non-corrosion-resistant materials. After a few years of use, these process connections get damaged. 　　4. Corrosive media can reduce the safety protection capabilities of instruments and meters, and in severe cases, may even lead to safety accidents. 　　Leaks of corrosive substances, if not detected and addressed in a timely manner, can also easily lead to safety and personal accidents. Therefore, to ensure the accuracy of its measurements, it needs to be maintained regularly; care must not be taken lightly.