Volume flowmeter measured in accordance with the choice of medium range and the different, select the appropriate flowmeter. The high viscosity of the oil may consider the scraper-type volume flow meter. For low viscosity of the oil and water measurements May consider the oval gear, such as lumbar wheel volume flowmeter, the accuracy of Yaoqiubugao of the occasion, may also have rotating piston or scraping pull-volume flow meter.

the gas flow measurements, general can be transferred or rotary piston Drum volume flow meter. in the measurement of gas, is more commonly used membrane-volume flow meter in some of the higher accuracy of measurement , Gear-type gas volume flow meter was also used.

volume flowmeter limit the amount of identification, such therapy is usually used: minimum flow qmin, is based on errors of flowmeter to decide. that is, the minimum flow of error must be allowed within the scope of error; limit traffic qmax, Flowmeter moving parts is to consider the situation and decided to wear. Excessive flow, the flow meter moving parts will lead to accelerated wear and tear caused by leakage increases, increased .- error as the choice for qmax 5-10 qmin.