View uzz9001 appnote00004 datasheet:

APPLICATION NOTE Contactless Angle Measurement using KMZ41 and UZZ9001 AN00004 Philips Semiconductors  Philips Semiconductors Contactless Angle Measurement Using Application KMZ41 and UZZ9001 Note AN00004 Abstract Angle measurement is frequently required in both automotive and industrial applications. Contactless methods have the advantage that they are free of wear. If a magnetic field acts as the transmitter between the physical value to be measured and the actual sensor, the magnetic system and the signal conditioning electronics can be encapsulated separately making such systems robust against dirt, dust and liquid as well as mechanical destruction. Among this class of measurement systems, those using the magnetoresistive effect (MR effect) are characterised by the addi