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[Chemical Knowledge]：What is a flow meter? How to choose the right flow meter?

Read： 592 Time：18months ago Source：Transform the World with Simplicity

What is a flow meter?
A
flow meter is a metering instrument used to measure the flow rate and volume of a fluid (liquid, gas). They are usually used in industrial, medical, environmental protection, civil and other fields, and are widely used in fluid quality control, production process control, environmental monitoring and so on. Classification and

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flow meters According to their measurement principles and characteristics, flow meters can be divided into many types, among which the common ones are magnetic flow meters, vortex flow meters, pre-selected mass flow meters, and differential pressure flow meters.

magnetic flowmeter is a kind of flowmeter that measures the flow of conductive fluid according to Faraday electromagnetic induction principle. Its characteristic is that it is not easily affected by medium corrosion, viscosity change and other factors. Vortex flowmeter uses the pressure pulsation caused by turbine rotating in liquid to generate vortex to calculate the fluid flow. The pre-selected mass flowmeter disperses the fluid into multiple branch flows according to the Coriolis effect, the flow rate, temperature, pressure and other parameters of each branch fluid are measured respectively to calculate the overall flow rate. The differential pressure flowmeter is based on Bernoulli's principle and calculates the flow rate by measuring the pressure difference before and after the fluid passes through the pipeline.

applications and precautions

flow meters are usually used in industrial automation fluid control, water conservancy, biochemical engineering, sewage treatment, valves and pipe section performance testing and other fields. In the use of flow meter, there are some applications and precautions need to pay attention to:

1. determine what type of flow meter is more suitable for measuring the required medium flow, especially to focus on the state and characteristics of the medium.

2. Choose the correct installation position and method, because the installation position will affect the actual measurement of the flowmeter.

3. Select the correct range and accuracy level according to the requirements to ensure the accuracy of the measurement results.

4. Regularly clean, correct and maintain the flowmeter to ensure its normal use and extend its life.

summary

flowmeter is an important measuring instrument, is widely used in various fields, especially in the field of industrial automation. Choosing the right flowmeter, using and maintaining it correctly is an important part of ensuring industrial production and living standards. It is hoped that through this article, readers can have a deeper understanding and understanding of the basic concepts, classification, application and precautions of flowmeters.