New sensors exploiting giant magnetoresistance technology are capable of
sensing the rotational speed and direction of gear teeth in the
temperature range -40 to +150oC. The GT series sensors from Rhopoint will
tolerate larger air gaps to the target, compared with competing
technologies, and are not destroyed by strong magnetic fields. They are
available with analogue, sine/cosine or digital outputs and are supported
by a signal processing IC that can be located away from the sensor.