Sketch constructional diagram of the operation of electromagnetic flow meter. State its two limitations.

Sketch constructional diagram of the operation of electromagnetic flow meter. State its two limitations.
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Limitations: 1. It is used only for liquids. 2. It is not suitable for low velocity. 3. It is more expensive. 4. It is suitable for fluids having conductivity greater than 20 micro ohm/cm. 5. Gas inclusion cause errors. 6. Difficulties in on site calibration

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