Velocity measurements common to flowmeters

1. Speed ​​measurement method of electromagnetic flowmeter

Electromagnetic flowmeter is a widely used flowmeter, usually used to measure the flow rate of liquid. Its speed measurement method uses the law of magnetic induction to calculate the flow rate by sensing the potential difference in the moving conductor in the liquid. The advantages of electromagnetic flow meters are wide application range, high accuracy and good stability, but the disadvantage is that it requires high conductivity and cannot be used to measure non-conductive liquids.

2. Speed ​​measurement method of vortex flowmeter

Vortex flowmeter is a common flowmeter suitable for measuring the flow rate of gas or liquid. The speed measurement method is based on the principle that the vortex plate rotates when pushed by the fluid in the fluid, and the frequency of rotation is measured to calculate the flow speed. The advantages of vortex flow meters are large measurement range, fast response speed, and high accuracy, but the disadvantage is that it requires high purity of the fluid and is easily affected by contamination.

3. Speed ​​measurement method of ultrasonic flowmeter

Ultrasonic flowmeter is a new type of flowmeter, suitable for measuring the flow rate of gas or liquid. The speed measurement method is to use the time difference between the ultrasonic unit to transmit and receive sound waves, and to measure the fluid flow rate by calculating it. The advantages of ultrasonic flow meters are wide application range, not susceptible to contamination, and non-contact measurement method, but the disadvantage is that they are sensitive to changes in liquid temperature and pressure.

In summary, common speed measurement methods for flow meters include electromagnetic flow meters, vortex flow meters, ultrasonic flow meters, etc. When using it, you need to choose the appropriate flow meter and speed measurement method according to actual needs to ensure the accuracy and reliability of the measurement results.