消除周围磁场（消磁）对于EM产生高分辨且稳定的图像非常必要。FCS12运用一个易安装的三轴感应器和电缆回路。通过添加一个附加感应器，即可消除DC场的移动。
FCS12 可消除0.5Hz至5000Hz的磁场。
FCS-DC 选配件，可消除DC场的移动。
FCS 12
The FCS12 is an electronic system for reducing ambient magnetic fields with frequencies between 0.5Hz and 5000Hz, also DC field changes (Optional).

The FCS12 can be essential equipment to allow SEMs and STEMs to display high resolution stable images.

The small sensor is placed very close to the electron column. The sensor measures the ambient magnetic field X, Y and Z components and this information is displayed by the system controller.

An antiphase field is created using three orthogonal cable sets which are installed in the microscope room. This antiphase field cancels the ambient field to allow the microscope to perform as designed.

FCS20W - wideband magnetic field cancelling system (DC to 2500 Hz)