Referred to interchangeably as a Watt-hour Meter or Energy Meter, an Electricity Meter is a device designed to measure the electric energy used by households, businesses, or any electrically operated equipment. Its primary function lies in providing precise records of the energy expended by consumers’ electrical appliances. Key applications include residential electricity billing, energy management in commercial and industrial settings, power system monitoring and control, and programs focused on energy conservation and efficiency. The transition from mechanical to electronic models has significantly boosted measurement precision, expanded functional capabilities, and improved integration with contemporary power systems.