When examining placement and conducting design, be aware of the direction
and size of the
magnetic force lines emanating from the magnet in a 3D space. Even when a magnet is close, the
sensor may be unable to turn on unless the direction of the magnetic force lines matches the
sensor detection direction, and the sensitivity may appear to drop if the magnetic force lines
reach the sensor at a slant. If the preliminary study is inadequate, unexpected operation could
occur in the prototype or mass-production processes.
The strength of the magnetic force lines changes based on the temperature.
Determine the placement so that the magnetic force is sufficiently larger
than the sensor ON
sensitivity at the ON position and is sufficiently smaller than the OFF sensitivity at the OFF
position.
If there is another magnet or magnetic body (such as a metal plate reacting
to the magnet), it
could affect the sensor and result in an unexpected operation. Because it is difficult to
provide guidelines for the affected range, try to make a design that provides as much separation
as possible.