A Hall effect current sensor is a device that uses the Hall effect to measure the current flowing through a conductor. It consists of a conductor, usually a wire, through which the current to be measured is passed, and a Hall effect sensor that is placed in close proximity to the conductor. When the current flowing through the conductor creates a magnetic field, the Hall effect sensor is sensitive to this field and produces a voltage output proportional to the strength of the field. This voltage output can then be used to determine the magnitude of the current flowing through the conductor.

Hall effect current sensors have several advantages over other types of current sensors. They are non-intrusive, meaning that they do not need to be physically connected to the conductor in order to measure the current. They are also highly accurate and have a wide dynamic range, making them suitable for measuring a wide range of currents. They are also immune to electrical noise, making them ideal for use in noisy environments.