The industrial encoders contain a contact-less magnetic sensor system and a precision toothed wheel. The sensor’s magnetic field is modulated by the passing of the teeth of the measuring wheel.
The resulting sinusoidal and co-sinusoidal voltage is evaluated by the integrated electronic and converted to an incremental output and optionally to an additional analogue current output.
Advantages of the magnetic system:
* Unaffected by condensation on the measuring wheel and is therefore the preferred choice for applications, where ambient temperatures change or where the relative humidity is high. (e.g. outdoors)
* Unaffected by oil or dirt penetration.
* The steel measuring wheel is highly resistant to shock and vibration, unlike glass or plastic graduated discs in other systems.
* Excellent reliability over a very long life because it does not suffer from the ageing effect common to optical systems.
