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Sensor Magnets - Permanent Magnets Specified for Magnetic Sensors and Transducers   ChenYang Technologies GmbH & Co. KG supplies all kinds of permanent magnets specified for applications to magnetic sensors/transducers, such as magnetostrictive position sensors, magnetoresistive (Hall, AMR and GMR), reed sensors etc. These magnets are made by NdFeB, SmCo, Alnico, ceramic/ferrite, bonded magnetic materials and are customer specific magnets with different shapes, sizes and magnetic properties. The following table help you find the optimal magnet material for your sensors and transducers. Magnetic Material NdFeB Material Hard Ferrite SmCo Material Alnico Material Max. Energy Product B×H max (MGOe) 28 ~ 51 0.8 ~ 5.1 14 ~ 32 1.13 ~ 9.0 Remanence (kGs) 10.2 ~ 14.5 2.0 ~ 4.6 7.5 ~ 12 5.2 ~ 13.5 Intrinsic Coercivity iHc (kOe) 11 ~ 30 1.6 ~ 5.0 5.2 ~ 25 0.38 ~ 1.88 Curie Temperature (°C) 310 ~ 370 460 700 ~ 800 810-860 Maximum Operating Temperature (°C) 80 ~ 200 250 250 450 ~ 550 Temperature Coefficient of Br (%/°C) -0.12 ~ -0.10 -0.18 ~ -0.2 -0.05 ~ -0.03 -0.025 ~ -0.02 Temperature Coefficient of iHc (%/°C) -0.6 0.2 ~ 0.5 -0.25 ~ -0.19 0.01 ~ 0.03

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