... ,A mobile magnetized coil,inner diameter 400mm.8,The human-machine interface control system 11,Automatic demagnetization systemAttenuation type automatic demagnetization ... ,Timely set5,Circular and longitudinal can switch6,Sensitivity6.1,Sensitivity:Clear indications on test piece Model A #2.6.2,Dc ... 3400 A dc current,Try piece of six holes show clear(10.67 mm away from the surface)7,Demagnetization way ...