Which hall sensor to choose?

Question

Electronics

I myself don’t know the exact requirements yet, but the task will be solved as follows: I will crawl the hall sensor over the surface of a flat sample (more precisely, the sample will be on the xy-coordinate table), at each step I will take a signal from the sensor, and build a distribution map. But you need a very small sensor, less than 50 microns / step, and in order to know exactly at what point the measurement is taking place, otherwise in ordinary sensors that are in plastic cases, it is not known where the plate itself is located. Are there any options?

Answer 1

resolution of 50 microns is the level of HDD heads, while it is extremely doubtful that their system will be able to work in analog mode.
if the task is so steep and specific, micron distances are measured in xyz, then there is no difficulty in somehow compiling the radiation pattern of the magnetic element itself for any sensor and using its model to measure workpieces. the accuracy and quality of the data obtained in this embodiment are determined by the output circuits of amplification and / or matching and have nothing to do with the sensor.