An encoder is an electromechanical device that converts information from one format or code into another. A position encoder, converts linear or rotary motion into an electrical signal that provides information on position, speed, and direction of motion.
Magnetic encoder systems use a magnetised scale featuring a series of alternating magnetic poles. Motion along the scale is determined by a readhead that contains a sensor that detects the change in magnetic field as the readhead moves and converts this change into an electrical signal. Magnetic encoders are often used in robotics (such as automated guided vehicles) and printing applications.
Sensor magnet/sensor magnetic rings are an essential part of the magnetic encoder system. CCmagnetics has the most comprehensive single-track encoder magnetic rings and dual-track encoder magnetic rings in the world, and they do not require you to pay extra mold fees.