Measuring fluid flow Meter is collectively referred to as flowmeter or flow meter. Flowmeter is one of the important instruments in industrial measurement. With the development of industrial production, the accuracy and range of flow measurement are more and more demanding, and the flow measurement technology is changing rapidly. In order to adapt to various uses, various types of flowmeter have come out. There are more than 100 kinds of flowmeter already in use.
Each product has its specific applicability and has its limitations. According to the principle of measurement, the principle, thermal principle, acoustic principle, electrical principle, optics principle, atomic physics principle and so on.
According to the structure principle of flowmeter classification. There are volumetric flowmeter, differential pressure flowmeter, float flowmeter, turbo-flowmeter, electromagnetic flowmeter, fluid oscillation flowmeter vortex flowmeter, mass flowmeter and insertion flowmeter.
According to the object of measurement, there are two kinds of closed pipes and open channels, and the measuring purposes can be divided into gross and flow measurements, which are called aggregate meter and flowmeter respectively. Total meter measurement for a period of time flowing through the pipeline, is a short time flow through the total amount, in fact, flowmeter is usually also equipped with the cumulative flow device, the total amount of table use, and the volume table also has a traffic signal device. Therefore, it has no practical significance to divide flowmeter and aggregate meter strictly.