Editing Hall effect sensor (section)

=== Directionality ===
Hall elements measure only the sensing axis component of the magnetic field vector. Because that axial component may be positive or negative, some Hall sensors can sense the binary direction of the axial component in addition to its magnitude. An additional perpendicularly-oriented Hall element (e.g. in {{Slink|Hall effect sensor|Dual Hall sensor ICs|nopage=y}}) must be incorporated to determine a 2-D direction, and another perpendicularly-oriented Hall element must be added to detect the full 3-D components of the magnetic field vector.