A current sensor is an electronic device used to detect and measure electric current flowing through a wire or circuit. It converts the current into a readable output signal, which can be analog or digital. Current sensors are essential in various applications, including power monitoring, battery management systems, and industrial automation. They help ensure safety, efficiency, and performance by providing real-time current data.

There are different types of current sensors, such as Hall effect sensors, shunt resistors, and magnetic field-based sensors, each suited for specific applications. Accurate current measurement is vital for protecting equipment and optimizing energy usage in electrical systems.