Magnetic sensors

The MFS and MGS magnetic sensors from ifm electronic comprise solidstate magnetic sensing chip, as used in hard drives, packaged in a sealed stainless steel housing in standard M12 (MFS) and M18 (MGS). The housing is formed from a stainless steel body and an integral stainless steel sensing face.

This alternative position detection technology is said to open up new applications in harsh environments that are too dirty for photocells. The magnet and sensor also operate through non-ferrous metals without reduced sensing. ifm electronic says iron and steel behind a magnet can increase the strength of the magnetic field (+20%), giving greater range.

Standard ranges depend on magnet type and strength, but are typically reckoned to be 60 to 70mm.