Internal magnet means Hall sensor detects plain steel

Allegro MicroSystems precision programmable Hall sensor IC that includes differential Hall elements and an internal rare-earth magnet to allow it to detect ferrous targets that are not themselves magnetic. Called ATS344, it is intended for automotive applications requiring high resolution detection of long stroke (>5 mm) linear motion. “The ATS344 is well-suited for applications that require ...

This story continues at Internal magnet means Hall sensor detects plain steel

Or just read more coverage at Electronics Weekly