Bipolar Hall switches are specifically divided into bipolar Hall switches without latch and bipolar Hall switches with latch. “Bipolar Hall effect switches typically open when the magnetic field strength at the south pole is sufficient, and close when the magnetic field strength at the north pole is sufficient. However, if the magnetic field is removed, it is a random output, either open or closed.". Bipolar latching Hall effect switches typically open when the South Pole magnetic field strength is sufficient, and close when the North Pole magnetic field strength is sufficient. However, if the magnetic field is removed, the output state will not be changed. These Hall effect switches can be magnetically driven using a north-south alternating magnetic field and a multipole ring magnet.