What Is The Flow Meter?

Oct 11 , 2019

A flow meter is a meter that indicates the measured flow rate and/or the total amount of fluid over a selected time interval. Simply put, it is a meter used to measure the flow of fluid in a pipe or open channel.

There are many types of flow meters, and here I will focus on introducing two types of flow meters.


The first is an Ultrasonic Flow Meter. At present, the water intake in the water conservancy industry is mainly based on the open channel and pipeline transportation. Most of the water sources that need to be transported by pipeline are mainly groundwater, river water, river water and lake water, which are mainly used for water production, industrial water, irrigation, etc. Ultrasonic water meters are suitable for all places where the flow of water in the pipeline needs to be measured.


Ultrasonic Flow Meter

Ultrasonic Flow Meter

The main applications are:

1. Water resources measurement and supervision of public enterprises such as factories, enterprises, large public buildings, etc.

2. Measurement of agricultural water use. The application advantages of ultrasonic water meter are mainly reflected in: 1. Adapt to various water quality: Ultrasonic water meter has no obstruction original, and can be used to measure the water flow with poor water quality (including gravel and weed), and will not affect the performance of ultrasonic water meter.

3. High precision: high measurement accuracy, large range ratio, and measurement and monitoring of water volume. 3. Good reliability: The environment of the monitoring points in the water industry is relatively poor. The ultrasonic water is expressed in the protection level of IP68, which is suitable for the harsh external environment. Compared with the smart water meter based on mechanical water meter, the protection against external strong magnetic attack is stronger. The ultrasonic water meter can recover after receiving strong magnetic attack from the outside, compared with the smart water meter after strong magnetic attack. Will be damaged, the ultrasonic water meter performs excellently.

4. Convenient networking and communication: The ultrasonic water meter interface is complete, and the informationization and intelligence of water resources monitoring are realized.

5, energy saving and emission reduction: the ultrasonic water meter has no internal flow resistance, low pressure loss, and saves energy consumption of the pump. In addition, the ultrasonic water meter has reached the micro-ampere level during the metering operation, and is powered by a battery. The service life can reach more than 10 years.


The second type is an Electromagnetic Flow Meter. The electromagnetic flow meter is a flow meter designed by Faraday principle. It can measure conductive liquid with impurities. It not only has high precision, low maintenance cost and durability, but also can measure conductive liquid with impurities. It brings convenience to users and various large enterprises. The principle of electromagnetic flow meter measurement is based on Faraday's law of electromagnetic induction. The measuring tube of the flow meter is a non-magnetic alloy short tube lined with an insulating material. The two electrodes are fixed to the measuring tube through the tube wall in the tube diameter direction. The electrode tip is substantially flush with the inner surface of the liner. When the exciting coil is excited by the two-wave pulse, an operating magnetic field having a magnetic flux density B is generated in a direction perpendicular to the axis of the measuring tube. At this time, if a fluid having a certain conductivity flows through the measuring tube. The cutting magnetic field lines induce the electromotive force E. The electromotive force E is proportional to the magnetic flux density B, and the product of the inner diameter d of the measuring tube and the average flow velocity v. The electromotive force E (flow signal) is detected by the electrode and sent to the converter via a cable. After the converter amplifies the flow signal, it can display the fluid flow, and can output signals such as pulses and analog currents for flow control and regulation.


The above is my detailed description of the flow meter, if you have any questions, please contact us, click on the link in the article or board our website to learn more about the flow meter. As a professional Flow Meter Manufacturer, we believe that we can provide you with professional services.


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