Metal tube rotameter introduction

The rotameter is a volume flow meter that measures the flow area between the floats as the flow changes in the vertical tapered tube, also known as the rotameter. At the beginning of the 20th century, this type of instrument was named Roto meter in Germany, which was popular in Europe. However, it is often called variable area flowmeter (Variable Arer Flowmeter) or area flowmeter in the United States and Japan; but it is actually just a variable area flowmeter. It is a variety of the variable area flowmeter, but because the float flow accounts for the vast majority of the variable area flowmeter, it is customarily called the variable area flowmeter. The idea of ​​the principle of the rotameter was developed in the 1860s, and commercial products appeared in the early 20th century. In the late 1930s, the carbon mandrel method created conditions for the mass production of glass conical tubes and laid the foundation for the industrial application of rotameters. In the 1940s and 1950s, Europe and the United States successively carried out development and performance research. In particular, Fischer and Porier companies in the United States made contributions to improving performance and expanding varieties, such as reducing the influence of liquid viscosity and having output signals, which greatly expanded the application field. In the late 1950s, Shenyang Glass Instrument Factory first provided glass tube rotameters in my country, and in the mid-1960s, Shanghai Guanghua Instrument Factory first provided metal conical tube rotameters with output signals. From 1985 to 1987, sales of float flowmeters in Japan, Western Europe and the United States accounted for 11% to 17% of flow meters, and in my country in 1990 it accounted for about 14%. From the perspective of the proportion of the number of applications, the rotameter accounted for 19.2% of the 17,000 flow meters of 72 companies in the UK sample survey in 1985. In 1996, the production of rotameters in my country was estimated to be between 150,000 and 170,000 units, of which about 95% were glass tube rotameters.

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Many of the mass flow meter listed here can be purchased for less money, but in general we recommend paying a slightly higher price for significantly improved performance. These are our top choices and their recommended configurations.