Advantages of Electromagnetic flowmeter | disadvantages of EM flowmeter

This page covers advantages and disadvantages of Electromagnetic flowmeter. It mentions Electromagnetic (EM) flowmeter advantages or benefits and Electromagnetic (EM) flowmeter disadvantages or drawbacks..

Introduction:
• They are non-obstruction type of flow meters.
• They are used for flow measurement of slurries and electrically conducting liquid.
• EM flowmeter consists of non-conducting and non-magnetic pipe which carries liquid whose flow needs to be measured.
• The pipe is surrounded by electromagnet which produces magnetic field.
• The fluid flowing through pipe is conducting type.

Benefits or advantages of Electromagnetic flowmeter

Following are the benefits or advantages of Electromagnetic flowmeter:
➨It does not produce any drop in the pressure.
➨Voltage output depends on speed of flow of liquid.
➨Bi-directional flow can also be measured by reversing the connections.

Drawbacks or disadvantages of Electromagnetic flowmeter

Following are the disadvantages of Electromagnetic flowmeter:
➨Fluid conductivity must be higher so that they can act as conductors.
➨Trapped bubbles of gas lead to error. Hence EM flowmeter requires electrical as well as mechanical cleaning at regular intervals.

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