What type of meter measures electrical energy consumption?

The Kilowatt-hour (kWh) meter is specifically designed to measure the total electrical energy consumed by a system over time. This meter tracks the amount of electricity that is used in kilowatt-hours, which is a standard unit of measurement for energy usage in residential and commercial settings. By recording the cumulative energy consumption, it allows utility companies to bill customers for their usage accurately.

In contrast, a voltmeter measures voltage, which is the electrical potential difference between two points. An ammeter measures the flow of electric current in amperes, while an ohmmeter measures resistance in ohms. None of these instruments provide a measurement of energy consumption over time in the way that a kilowatt-hour meter does.