electricity meter

North American domestic electromechanical (Ferraris disk) power meter in its meter base (located in Loveland, Colorado, USA). North American domestic electronic power meter in its meter base (located in Los Angeles, California, USA). Electricity meter with transparent plastic case (Israel) An electricity meter, electric meter, electrical meter, energy meter, kilowatt-hour meter, or power meter is a device that measures the amount of electric energy consumed by a residence, a business, or an electrically powered device over a time interval.

Electric utilities use electric meters installed at customers' premises for billing and monitoring purposes. They are typically calibrated in billing units, the most common one being the kilowatt hour (kWh). They are usually read once each billing period.