Flowmeter classification too much, different media correspond to different flowmeters, first of all, what is electromagnetic flowmeter and ultrasonic flowmeter.
The so-called electromagnetic flowmeter is designed by the principle of magnetic induction of Ferrari. The main structure of the electromagnetic flowmeter is composed of magnetic circuit system, measuring catheter, electrode, shell, lining and converter. From the point of view of physical properties, it has a strong anti-interference ability, not affected by the viscosity, density and pressure of the object. This kind of flow gauge is relatively common, the production and maintenance technology is relatively mature. It has the advantages of corrosion resistance, wear resistance, long service life, second can be two-way measurement, easy to operate. Electromagnetic flowmeters are now used in metallurgy, industry, chemical, agricultural irrigation, environmental protection, medicine and other fields, typically used to measure the volume flow of conductive liquid in a closed tube.
But the electromagnetic flowmeter can not measure vapor, gas, etc., so the limitation is relatively large, in the conductivity of very low liquid, electromagnetic flow measurement effect is not ideal.
Ultrasonic flowmeter is to measure the size of the liquid flow in the pipeline by ultrasonic wave. As early as in the 1970s, ultrasonic flowmeter has been widely used. Now its technology is more mature and more widely applicable. Ultrasonic flowmeter is a great advantage is that it can not contact the measured object to check the size of the fluid flow, such an advantage is that no matter what medium or diameter of the pipeline, will not affect the efficiency of the ultrasonic flowmeter, at the same time, like electromagnetic flowmeter can not detect the gas and vapor, ultrasonic flowmeter can detect.
