AMR Sensors FAQ

Precautions on Using

Evaluation using the customer product

Be sure to verify the correct operation of the magnetic switch you choose not only at room temperatures, but also in a broader temperature range. The magnetic field strength and the sensitivity of the AMR sensor change with outside temperatures. At higher temperatures, the sensor has a shorter detection range (or it is less easily switched on), and vice versa. If other magnets are expected to get close to the sensor during use, check that such events have no impact on sensor operation. It is only natural that as a magnetic switch, the AMR sensor reacts to other magnets, but it would be a defective design if it were to remain switched on when there were no longer any other magnets around. (This problem is caused by nearby magnetic materials that have been magnetized by other magnets.)

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