Electromagnetic Flowmeter – A Complete Guide

An electromagnetic flowmeter is a leading choice to deliver the precision and performance your applications always require. BSCT group is the manufacturers dealing with several instruments, and an electromagnetic flowmeter is one of them.

Here, the FAQs related to electromagnetic flow meter’s operation and installations use working principles and many others. These are answers to the queries which the users can face. It will help you in handling the electromagnetic flowmeter.

What is an electromagnetic flowmeter?

An electromagnetic flowmeter is used for determining the flowing liquid. The liquid passes the magnetic field through which the voltage is provided. It is sensed by the electrodes, which are fixed on the walls of the tube. The voltage which is generated is directly linked to the liquid running.

The voltage keeps generating as long as the voltage is being provided. Therefore, the electromagnetic flowmeter proceeds the signals of the voltage for regulating the flow of the liquid. Faraday’s law of induction is used by electromagnetic flowmeter so that the liquid of the pipe is easy to determine. This device is beneficial indeed.

What is measured by an electromagnetic flowmeter?

You can use an electromagnetic flowmeter to measures the fluid flow through the voltage, and the flowing liquid induces it with the help of a magnetic field. Some electrodes are fixed in the tube for detecting the voltage which is being generated by conducted fluid. It stays connected with fluid but doesn’t interfere with the flow.

An insulator covers the tube inside for measuring. Like it is of rubber, neoprene or any other material. The voltage induced is received, sent to the transmitter, and displayed on an electromagnetic flowmeter. Here, you can see the output of the volume of the flow rate is calculated.

How to install an electromagnetic flowmeter?

The installation process of the electromagnetic flowmeter is relatively straightforward. Four steps are included in installing an electromagnetic flowmeter.

Please select the right location for the installation, and it needs to be inspected.

After inspection, you can make sure the pipe is installed in the correct position. Must check that all the connections are working properly, especially the ground one.

Switch on the electromagnetic flowmeter and need to warm for 20 minutes. After that electromagnetic flowmeter starts working in a normal state.

Zero accuracies are needed during the maintenance of the electromagnetic flowmeter. If there is some fluid in the tube of the electromagnetic flowmeter, then adjustments are made according to the performance.

What is the purpose of using an electromagnetic flowmeter?

There are few reasons for using the electromagnetic flowmeter:

• It delivers the rate of accuracy is high
• The design of this flowmeter is simple and easy to use
• The large size of pipes is easily available whose range is from mm to meters according to the diameter
• It consumes less power and is battery operated
• It works in multiple directions
• It is good at handling the rates of the flow no matter it is high, low, or even changed
• Requires less pressure, and a small portion of the pipe is needed
• Turn down ratio is good enough, and the range is from 0.3 m/sec to 10 m/sec

What benefits do electromagnetic flowmeters provide?

• It is not affected and disturbed by the heavy flows
• Electromagnetic flowmeter works in two directions
• The electromagnetic flowmeter can also handle the low flows
• It is appropriate for acid and bases as the present material inlining is an insulator. It is also resistant to corrosion.
• This type of flowmeter can easily handle heavy flows like mud and sewage.
• Even the loss of pressure is not possible.
• Practically, an electromagnetic flowmeter doesn’t depend on external factors, including pressure, density, or temperature.
• It requires less power supply especially dealing with DC ones.

What are the uses of an electromagnetic flowmeter?

The electromagnetic flowmeters help treat the water for the plants. It also treats sewage water and chemicals. It is also needed by the processes related to the mining and minerals industries. It has methods for treating and considering heavy flows. It easily deals with any liquid.

Along with general purposes, it measures pastry kinds of liquids like the pulp of paper or cement. Due to its amazing performance, it is used in several industries. It includes chemical, steel, petroleum, and even pharmaceutical industries. They use an electromagnetic flowmeter due to its wonderful features, which can’t be ignored.

Where is the electromagnetic flowmeter found?

An electromagnetic flowmeter is found in different industries due to its benefits. Even various types of electromagnetic flowmeters are available in the market. It is commonly found in the sectors for treating the water along with its production and supply. Different

processes in the industries use electromagnetic flowmeters as they can handle corrosive liquids.

This flowmeter has to be filled with the liquid as it affects the measurement of the liquid. An electromagnetic flowmeter can be seen in the applications of the paper and mineral processing industries. It helps in treating the water where the liquid is not clean. Even it can measure the flow.

What are the factors which cause errors in electromagnetic flowmeter during measurement?

There are some factors due to which errors occur during measurement in the electromagnetic flowmeter. They are as follows:

The pipe is not filled with fluid due to the pressure, which is not enough.

The minimum value of conductivity should be 5 microseconds/cm. If the conductivity is less than the value mentioned, then it creates fluctuations while data is flowing.

The material of earth rings is not correct and for this manufacturer of electromagnetic flowmeter needs to be contacted. It should provide the material according to the suitable conditions and check that proper grounding is done.

These errors can be solved easily at the time of installation and selection of the model.

There are many products available related to the electromagnetic flowmeter, so order the one which fulfills your requirements. The electromagnetic flowmeter price varies depending on which type of electromagnetic flowmeter is being selected for purchase.

How much voltage is required by an electromagnetic flowmeter?

The electromagnetic flowmeter works on the principle of Faraday’s law of induction and according to which the voltage is being induced when the conductor passes through the magnetic field. It was dependent on the liquid flowing—the voltage which is produced with directly linked with the rate of the flow.

24V is needed if it is DC supply and 230V AC supply. If the DC is supplied, then the lower level of the voltage has been preserved to gain a higher level of accuracy in the industries. Due to this reason, DC supply has received more superiority as compared to the AC supply.

On which principle does the electromagnetic flowmeter work?

In an electromagnetic flowmeter, Faraday’s law of induction is used for the detection of the flow. Through this law, the conductive liquids are dependent on the voltage, diameter of the pipe, and strength of the magnetic field. It simply means that the flowing liquid’s speed in the magnetic field converts into electricity.

When the changes in the flow occur, then electrodes gather the voltage. The voltage which is being induced proceeds digitally in the form of signals. It might be showing the rate, volume of the flow, or connectivity with the interface of the other equipment.

How can the accuracy of the electromagnetic flowmeter be check?

All electromagnetic flowmeters are highly accurate. Its accuracy is checked and dependent on the readings shown. It shows that what is the rate of the flow and at which voltage is it being received. The electromagnetic flowmeters require running pipes that are upstream and downstream.

It depends on the requirements and the piping project which is being selected. While when you are checking the accuracy, make sure the specifications of the electromagnetic flowmeter are verified and mentioned according to the task’s needs. And the meter is fitted on the correct spot from where the liquid will flow.

What is the difference between an electromagnetic flowmeter and an ultrasonic flowmeter?

The working principle of both meters is different. The electromagnetic flowmeter works on the principle of Faraday’s law of induction, whereas the Ultrasonic flowmeter uses sound waves to measure the fluid’s speed. The electromagnetic flowmeter is not affected by external factors like temperature and pressure. Ultrasonic flowmeters might face problems during the measurement of the liquids as some bubbles might cause an interruption in the way of sound signals.

A suitable environment for an electromagnetic flowmeter needs an electrical environment along with grounded cables. For an ultrasonic flowmeter, the material of the pipe should be thick enough to get the accurate desired outcome.

How does the electromagnetic flowmeter work?

As the electromagnetic flowmeters are using Faraday’s law of induction which helps in determining the flow of the liquid in the pipe. According to the law, the liquid passes from the magnetic field through which the electrodes receive the signal. As the liquid starts moving faster, then more voltage is being generated.

The transmitter that runs on electricity can examine the flow of the liquid through signals of the voltage received. It is best suitable for the conductivity of those liquids whose range is more than 5. The meter of the flow is enough in handling the measurements.

How is the display when the electromagnetic flowmeter is on?

There are 3 sections of the LCD fixed on an electromagnetic flowmeter. The first one is the status bar which shows that the status along with the error messages. The second section is the main one where all the values are present which are being measured. It displays flow rates, partial counters, positive and negative overall counters.

An extra bar is also found in the third section, and values measured are gathered in this section. They are the tags of the numbers or labels, united of the values measured and display of flow rate in graphical representation. All the functions can be seen in the menu.

How to make an electromagnetic flowmeter effective?

An electromagnetic flowmeter is a cost-effective choice, but it can be more effective in different ways. The additional features start working in an efficient way which makes the electromagnetic flowmeter more effective. It helps in collecting and transporting the liquid more smartly. The range of electromagnetic flowmeters is very comprehensive, which you can select according to your requirements.

Sometimes the noise also disturbs the magnetic field, and even it is strong—the rotational capacitor filter extracts the signals of induction along with a similar frequency. You can also analyze the data, and effectiveness increases through this method as well. Experiments are also performed on the data received.

What are the applications of electromagnetic flowmeters?

Considering the benefits of electromagnetic flowmeter, it is used in various applications.

• It helps in quantifying the drinking water
• You can use it on the site during construction for measuring the flow of slurries
• Plants of petroleum industries also use electromagnetic flowmeters for measuring the speed of flammable fuels.
• It is helpful in the measurement of moving of the liquids and paints, which are explosive.
• It is also suitable for batching concrete.
• You can use electromagnetic flowmeters to handles the flow very well, no matter how high or lows it is. Its response and dependency are on the changes of the flow.
• No extra drops of pressure are found.

Which factors to consider during the installation of the electromagnetic flowmeter?

Some factors need to be considered during the installation process of electromagnetic flowmeter as follows:

• The temperature of the environment should not be high
• The transmitters should be clean and tidy. It should be prevented from dust or sandy surroundings
• The instruments must be safety-proof to avoid accidents. It should be prevented from explosions and flammable materials.
• If the pump is being constantly replaced, then it might be trouble installing the electromagnetic flowmeter.
• The whole interference must be covered with protective shields if the surrounding is not good, then readings of the voltage received are not as expected.

What are the types of electromagnetic flowmeters?

There are three main types of electromagnetic flowmeters, which are mentioned below:

Battery-powered flowmeters: is among the best electromagnetic flowmeter which runs through the battery. The life of the battery of flowmeters is approximately 10 years.

Standard AC/DC flowmeters: these flowmeters are powered through AC/DC power supply. It is certified through MCERTS. Its accuracy rate is 0.25%, along with the electrodes and types of the flanges.

High solids flowmeter: these flowmeters measure the flow with the high solids through the coils. The coils are driven through an AC supply. Without any doubt, it is the strongest electromagnetic flowmeter considered in the whole world.

Which guidelines to follow for installing the electromagnetic flowmeter?

Some guidelines need to be followed during the installation of electromagnetic flowmeters.

• The flowmeter has to be placed above the pipeline
• The pipe should be open from where the fluid will be discharge
• There must be consistency in the flowing of the fluid, so it is displayed on the sensor table
• The size of the flowmeter should be correct. The installation will be failed if any error occurs.
• The sensor needs to be installed on the pump’s outlet
• Select the method of grounding according to the process carried in the pipelines.
• During the installation process, must take precautionary measures during the corrosive environment.

Who are the manufacturers of electromagnetic flowmeter in UK?

UK is among those countries that are top in manufacturing the electromagnetic flowmeter.  There are many manufacturers of electromagnetic flowmeters in UK who are delivering electromagnetic flowmeters around the world. Instruthinkis one of them who are providing professional services regarding the manufacturing of different instruments. Instruments for measuring flow rate, the electromagnetic flowmeter, is also available. All of it requires conductivity and proper flow of fluids.

We are also doing forex trading of electromagnetic flowmeters for many years. There are different kinds of flowmeters which are sold in other parts of the world. The quality of all the products is strictly controlled, and efforts are always applied in developing new products.

How do you deal with the issues related to electromagnetic flowmeters?

Sometimes issues arise while dealing with the electromagnetic flowmeter. Solutions are available, so the problems are solved easily. If the installation of an electromagnetic flowmeter is vertical, then the flow direction must be down to up. Do check the fluid is in the measuring tube. If the installation is horizontal, then the fluid is not present in the pipe. There must be some fault in grounding which needs to be checked.

The place for installation must be convenient enough for maintenance.  The electrode has to be covered with an insulating material. If the electrode leaks, then the capability of insulation decreases and interferes with the flow.

What power supply is needed by electromagnetic flowmeter?

Power supply requirements are an essential factor while choosing an Electromagnetic flowmeter. The availability of electricity is critical when an Electromagnetic flowmeter is on the field. If the application needs to be fixed remotely, then the battery option needs to be selected. The life span of batteries fixed in flowmeters is up to 10 years. The power supply should be 24V DC, or 230V AC power supply depends on which Electromagnetic flowmeter is fixed.

Which type of environment is suitable for installing an electromagnetic flowmeter?

The installation of an Electromagnetic flowmeter is suitable for indoors. There should be no exposure to the sun or pouring of the rainwater. The surroundings must be moist enough and protected from the sun. During the installation process, measures related to ventilation must be taken. The electromagnetic flowmeter must be away from hazardous materials.

The magnetic fields must be avoided along with the sources of vibration. If the vibration of the pipe is significant, then the pipe must be fixed for supporting the flowmeter. The devices like electric motors or transformers shouldn’t be near the installation as it interferes with the electromagnet.  In the production side of industries, a 220V power supply is required by an Electromagnetic flowmeter, and it starts without any extra equipment.

What are the features of the electromagnetic flowmeter?

Electromagnetic flowmeter is among the leading flowmeters. It is just due to its unique features, which deliver performances according to the need of the applications. The features of electromagnetic flowmeter are:

There is not any part that is moving in this flowmeter. That’s why the maintenance and drops of the pressure are low.

The ratio of the turnout is quite wide, which is 400: 1. The range of the flow is capable across several applications.

The results are highly accurate and impressive as well. The readings are just 0.20% of the value being measured.

It is an ideal device to be used in the applications of water waste.

How is a valuable electromagnetic flowmeter in treating sewage water treatment?

An electromagnetic flowmeter is being recommended for sewage water treatment as it can handle corrosive and heavy fluids like sewage very well. The sensor is placed on one side and is in contact with the electrodes.

The material of the lining is also resistant to corrosion. Its installation is easy, and the length of the pipe should be short. It is visible on the front side of the flowmeter. It is best suitable for managing the sewage water through the pipes placed in a straight position. The voltage which the induced one is directly related to the rate of the flow. So, the rate of the accuracy measure is high.

What is the difference between a magnetic flowmeter and an electromagnetic flowmeter?

Magnetic flowmeters are also called simple mag meters, which use traditional technologies for flowing the liquid. In this flowmeter, there is a coil system that is wrapped on the body of the coil. It works by the creation of a magnetic field through the part of the pipe. When the liquid is flowing across the magnetic field, the voltage is changed through the conductive particles.

Electromagnetic flowmeter is also known as Magnaflow. The voltage which is induced is directly related to the fluid which is moving in the magnetic field. With the help of the circuit, the voltage is carried by the transmitter. The volume of the flow is easy to calculate through the velocity and the area of the pipe.

Where is the output display in the electromagnetic flowmeter?

It is entirely your own choice regarding the output display. It can be analog or digital, depending on which model you need for communication. In analog, the spontaneous flow rates are being sent by the flowmeter. It is directly linked with the controller or some recorder that is controlling the system. The electromagnetic flowmeter is connected digitally in which a database of the flowmeter, flow rates, and diagnostics are available, which you can do your own. The mode of the output can be selected and changed at any time. In analog, the output has to be between 4 to 20 mA. Both of the output display measures the rate of the flow.

How accurate are the results of the electromagnetic flowmeter?

The accuracy rate is high in the electromagnetic flowmeter and is dependent on the percentage of the reading shown. The meter clearly shows the rate at which the liquid flows. While selecting the electromagnetic flowmeter, must consider the turndown. Turndown is defined as the flow range from highest to lowest, measured by the electromagnetic flowmeter.

All the readings are accurate, and the ratio of turndown of electromagnetic flowmeter is 160: 1. While considering the electromagnetic flowmeter, the accuracy is directly connected to the cost you pay in purchasing it. The high accuracy can be achieved from 0.25% to 0.5%.

Final Thought:

Instruthinkgroup has manufactured a battery-operated electromagnetic flowmeter. It is the kind of pipe that can be easily fixed in the mid of any process. The liner serves as an insulator to the measuring tube. If you have any queries or need to order an electromagnetic flowmeter, you can call us directly at +44 7700 307784 or email the team at sales@instruthink.com. Whether your company’s end-user, trading, or engineering company, you would be satisfied by our customized service.