What device is used to record the number of kilowatt-hours?

The device that is specifically used to record the number of kilowatt-hours is the meter register. This component is an essential part of electricity metering systems, typically functioning as an electromechanical or electronic unit that measures and displays total energy consumption in kilowatt-hours (kWh).

Kilowatt-hours indicate the amount of energy consumed over time, which is critical for billing purposes as utilities charge customers based on this measure. The accuracy and reliability of the meter register make it a vital tool for energy management and monitoring in residential, commercial, and industrial settings.

While other devices like voltage recorders, power analyzers, and energy loggers provide valuable data about different electrical parameters such as voltage levels, power quality, and energy trends, they do not specifically focus on recording total kilowatt-hours. These instruments might be used for diagnostic or analysis purposes but are not primarily designed for the purpose of measuring and recording energy consumption in kilowatt-hours.