Electric Meters

Electricity meter, energy meter or electric meter, is a device which is used for measuring the amount of electrical energy which is being supplied to or even produced by a residence, machine or business. Electric meters, of which the most common type are kilowatt hour meters, are used in electrical retailing, and the utilities are used to record the values measured by these electric meters, to help produce an invoice for the electricity used. Electric meters also record other information, such as the time when the electricity was used. The most common unit of measurement is the kilowatt hour, and the demand is measured in watts and averaged over a period of time, most usually a quarter of an hour.