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Flow Meter

Mag Flowmeters: suited for many challenging liquids


A flowmeter, as the name suggests, is a device that is used to measure the flow of a fluid moving in a bulk stream.The full bore electromagnetic flow meter,also known as a magmeter, measures the volumetric flow rate of the fluid by recording the voltage generated by it while passing through a magnetic field. Electromagnetic flow meters have been in use for more than half a century.

How it works?

The typical design of a magmeter consists of a pipe that has wire coils which are mounted on the outside. This pipe is has an electrical insulating surface like a steel tube lined with rubber. When a voltage is applied on the wire coils, it generates a magnetic field in the pipe. Now, when the conductive fluid passes though this magnetic field in the pipe, it generates a voltage. Electrodes mounted on the sides of the pipe detect this voltage and the flow rate is calculated from this voltage levels.
One essential thing to keep in mind is that a in-line magnetic flowmeter sensor works only for conductive fluids like water, acid, waste water.,etc, so it often been used as waste water flow meter, acid resistant flow meters, chemical flow meter, aggressive liquid flow meter.,etc. If used with non conductive fluids like hydrocarbon-based liquids, such as diesel, oil, the voltage will not pass through them and hence there will be no reading captured by the electrodes.

Advantages of electromagnetic type flow meter

An electromagnetic meter has a few advantages over other types of flowmeter, like the following-
They can easily be used to measure flow of dirty liquids like slurries, pulp and waste water. They can also measure the flow rate of other hard to measure fluids. And even though Doppler flowmeters can also handle all such fluids, they are not efficient enough for the purpose. Another unique advantage is the availability of several types of liners for the magnetic flow sensors. This makes the process more hygienic and allows the flow rate of almost any kind of fluid to be measured using the suitable liner type.

Other Features

The popularity of battery operated magmeters is on the rise. Sometimes these battery operated devices are installed in remote locations for measuring flow rates for fluids like waste water, irrigation water. They are also used to measure the flow rate of water from agriculture, irrigation, distribution channels and networks, etc. In all these cases not only are the devices battery operated, but they have wireless connectivity. This feature makes it possible to gather 'Automated Meter Readings (AMR)' from obscure locations, now we can also provide GPRS magnetic flow meter.

Future Research on mag meter

An area where there is ongoing research for the magnetic flowmeters, is on reducing the conductivity levels of the fluid required to capture the readings. By taking inspiration from how the transit-time meters have been optimized to handle more impure liquids, magnetic suppliers have been successful in reducing the minimum conductivity required to measure the flow rate. Though this research may not be as useful to measure flow of fully conductive fluids; it definitely increases versatility of the devices.

In Conclusion

Presently, the magnetic flowmeter market is rapidly growing, second only to the differential pressure (DP) flowmeter in terms of revenue. The growth in population is the major reason for increase in the use of the magmeter. This is because the full bore electromagnetic flow meter is used extensively to measure flow of clean and waste water. Additionally, these devices are also being used in place of turbines and other positive displacement meters in some cases. Both of these factors together will result in a further growth in the mag flowmeter market in the coming years.

  • GPRS Electromagnetic flow meterGPRS Electromagnetic flow meter2019/07/11Battery powered electromagnetic flow meter has a lithium battery which can work for 36-72 months, it has built-in GPRS/GSM/CDMA module which can send flow measurement value to cloud server to realize ...view
  • Insertion type electromagnetic flow meterInsertion type electromagnetic flow meter2019/06/27Insertion probe electromagnetic flow meter is suitable for pipeline size over 8 inches; it is ideal solution for large pipe size conductive liquid flow measurement ,such as waste water, portable water...view
  • Remote style Electromagnetic flowmeterRemote style Electromagnetic flowmeter2019/06/24Compact style mag meter has integral display together with magnetic flow sensors which is easy for flow rate reading and parameter configurations. It is usually used when the operation environment is ...view
  • In-line Magnetic flow meterIn-line Magnetic flow meter2019/06/27In-line mag flow meter takes measurement the whole pipeline section flow velocity where the mag sensor is mounted. It measure the conductive liquid volume flow rate, it has little effects on fluids de...view
  • Chemical Flow MeterChemical Flow Meter2018/01/03Chemical flow meters are intended to measure non-corrosive or corrosive liquid and gas, for example pesticides, detergents, acid, solvents and so on. These instrumentations are sometimes needed to be operated in harsh environment.view
  • Acid resistant flow metersAcid resistant flow meters2019/01/13Flow meters recommended for use with acids or chemically aggressive liquids. Silver Automation Instruments supplies acid resistant flow meters to measure the flow of strong hot corrosive acids like su...view