![]() ![]() When choosing a flow meter, it is helpful to understand exactly what level of accuracy the flow meter will deliver. The essence of the way that the accuracy is stated may be telling you about a different element of the inherent accuracy. The ways that flow meter accuracy is stated are not always an apples-to-apples comparison, where one could essentially be converted into another. Certain flow meter technology types lend themselves to the accuracy being stated in a particular way that may be different from other flow meter technologies. Our sales engineers are available to help you find the best solution for your application for free.įlow meter accuracy can be stated in many ways and sometimes the way a specific instrument’s accuracy is stated is driven by the geographical area where it was produced and how accuracy is commonly stated or classified there. Accuracy versus budget considerations and understanding your application’s exact accuracy needs can sometimes be confusing. A flow meter with an accuracy of 5%, which costs significantly less than another flowmeter with 0.2%, may deliver adequate results for your process to run correctly and deliver a much lower cost. Ultra-high accuracy flow meters, like Coriolis flow meters, typically are more expensive than any other flow technologies. While it may seem like it may be advantageous to gravitate towards the technology types that deliver extremely high accuracy, those meters may have technological principles or other limitations that do not work with your needs. The accuracy requirements for a flow meter depends a great deal on the exact application. There are many different flow meter technologies, and each type delivers different accuracies than other technology types. The electromagnetic flow meter is also known as the magmeter.Flow meters measure the volume or mass of liquid, gas, or steam moving through a piping system. It is heavy and extremely large in size.The electromagnetic flow meter has low accuracy.The extremely low flow rate can also be measured by the electromagnetic flow meter.ĭisadvantages of Electromagnetic Flow Meter.The electromagnetic flow meter can measure the flow of slurries, greasy, and can handle the corrosive fluid liquids.The output is uninfluenced by the varying characteristic of liquid like viscosity, pressure, temperature etc.The output voltage of the electromagnetic flow meter is proportional to the flow rate of the liquid.If the magnetic field around the pipe remains constant than the generating voltage is proportional to the velocity of the fluid. L – length of conductor = diameter of pipe m Where, v – velocity of conductor (flow) m/s The voltage is induced across the coil because of the flow of the liquid. The arrangement is similar to the conductor moving in the magnetic field. This electromagnet induces the magnetic field around the pipe. The electromagnet is placed around the insulated pipe. The insulated pipe carries the liquid whose flow needs to be measured. The electromagnetic flow meter consists the electrically insulated pipe made of fibre. Electrodes placed opposite to each other, magnetic coil placed on the pipe for generating the magnetic field etc. Construction of Electromagnetic Flow Meter ![]() The magnitude of the voltage depends on the velocity of the liquid. The liquid acts as a conductor and when passes through the magnetic field induce the voltage across the coil. The magnetic field is generated by the coil which is mounted on the external metallic body of the pipe. The magnitude of the voltage is directly proportional to the velocity, length of the conductor and the strength of the magnetic field. This law states that when the conductive liquid passes through the magnetic field, the voltage induces across the conductor. The electromagnetic flowmeter works on the principle of Faraday’s Law of electromagnetic induction. Working Principle of Electromagnetic Flow Meter The electromagnetic flowmeters work on the principle that the obstruction is created in the path of the liquid and the pressure of the liquid induces the voltage across the coil. ![]()
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