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A current sensor measures the amount of electric current flowing through a circuit. It works using different principles, such as Hall effect, resistive sensing, or magnetic field detection. The sensor provides either an analog or digital output, depending on the model. It is widely used in power monitoring, motor control, and battery management systems. The sensor can measure both AC and DC currents depending on the type. It helps in protecting circuits from overcurrent conditions. Current sensors are essential in industrial automation, renewable energy monitoring, and IoT applications. They come in various ranges to accommodate different current levels.