A Hall effect sensor detects the presence of a magnetic field by utilizing the Hall effect, which is the production of a voltage difference (Hall voltage) across a conductor or semiconductor when subjected to a magnetic field perpendicular to the current flow. The sensor contains a thin strip of conductive material through which a current flows. When a magnetic field is applied perpendicular to the current flow, it causes a buildup of charge on one side of the strip, creating a voltage difference that can be measured by the sensor. This voltage output is proportional to the strength of the magnetic field, allowing the Hall effect sensor to detect the presence and strength of a magnetic field.
