Between electromechanical and electronic meters, which gives the most accurate reading?

From the *metrology aspect, both meter types have the same accuracy and will give the same readings.

However, according to the normal practice of any utilities, the meters’ age factor (over 15 years for electromechanical meters and 10 years for the electronic meters) could affect the accuracy of the readings recorded.

Note: *Metrology is a science of measurement, a discipline that study the means of measurement, calibration and accuracy in the field of industry, knowledge and technology.

Why is there an increase in electricity bills after the electromechanical meter is converted to electronic meter? What is a smart meter? And is it safe? What is the meter accuracy rate according to the existing legal requirements? What are the advantages of electronic meters compared to electromechanical meters?

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