What kind of sensors use magnets?

Some netizens asked, what kind of sensor needs a sensor magnet?

Upmotion map is a typical application of Hall effect sensor to realize positioning: two magnets on one wheel pass through hall effect sensor.
Non contact sensors use magnetic materials. Such as Hall sensor, automobile position sensor, motor speed sensor, weighing sensor, security alarm sensor, magnetostrictive displacement sensor, automobile brake sensor, automobile wheel speed sensor, magnetic control sensor, speed sensor, water flow sensor, inductive magnetic sensor, inductive sensor, etc.
The sensor works with the magnetic steel to detect the magnetic field, or the magnetic material is added to the sensor to detect the ferromagnetic material.
Different sensors use different magnets, such as sintered Nd-Fe-B material, injection molding magnet, ferrite ring, and bonded Nd-Fe-B material. Welcome to order wholesale!