The SGM FMD is a safety device mounted on the electro permanent magnet and connected to its control panel giving indication to the magnet operator on whether or not the contact condition between magnet and load for every lift is good enough to guarantee a safe lift.
Indeed, the presence of air between the pole shoes of a magnet and a load to be lifted negatively influences the lifting capacity of the magnet. The greater the airgap (poor contact between magnet and load), the more the magnet force disperses in the air and the less the remaining force available for lifting the load.
In case of a negative reading by the FMD, the lift is disabled leaving the operator the possibility of repositioning the magnet on the load to find an appropriate contact.
SGM disposes of many years of consolidated references in the supply of the electro-permanent magnets for remote slit coils lines.