What is a magnetic encoder?
Magnetic encoders employ a signal detection system based on the variation of the magnetic flux generated by a magnet (one or more pole pairs) placed in rotation in front of a sensor, usually fixed to the encoder’s shaft. The variation of the magnetic field is sampled by the sensor and converted into an electric pulse, which determines the position; the magnetic technology could be of two types: on axis or off axis.
The main benefit of the magnetic technology is the absence of contact in the detection system, which helps preventing the wear and it’s therefore quite convenient in terms of costs, since it doesn't require maintenance and has a potentially infinite durability.
Magnetic encoders are particularly suitable for heavy duty applications that require high robustness, speed and a wide range of operating temperature, and they ensure, at the same time, an excellent reliability in the generation of signals.