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Sliding the MLS Sensors along a magnetic scale will produce a sine and a cosine output signal as a function of the position. In order to deliver satisfying results, this will be achieved as long as the air gap between sensor edge and magnetic scale surface does not exceed half of the pole pitch. As the sensor principle is based on the anisotropic magneto resistance effect, the signal amplitudes are nearly independent on the magnetic field strength and therefore air gap variations do not have a big effect on the accuracy. The sensor detects a magnetic gradient field and is thus almost insensitive to homogenous stray fields. Precise displacement values will be archived by using a sine/cosine decoder. The maximal obtainable precision depends on the distance sensor – magnetic scale and on the accuracy of the magnetic scale. Values of less than 1% of the pole pitch are common.

Features:
• Sin- / Cos-output signals suitable for signal evaluation by standard-ASIC’s
• High precision
• Insensitive to air gap fluctuations
• Highly reliable
• Low interference field sensitivity