In typical monitor shielding situations, the source may be strong and occupy an extensive area, making source shielding difficult to design and very expensive. Relocation of the sensitive equipment to an area free of interfering fields may also be possible. For an easier solution, consider a shielded monitor enclosure. Many magnetic shielding problems can be solved with a pair of scissors and a sheet of magnetic foil. The foil is hand trimmed to the required outline and fitted around the structure to be shielded.
Measurements then tell whether refinements are needed.
Satisfactory ductile foil material, ranging from 0.002 to 0.01 in thick, is available in various permeability ranges. It is necessary in some cases to provide shielding of bus bars or high current carrying conductors. R.F.I.Industries can design and supply shielding ducts or shadow shielding in plant rooms using high permeability steel or mu-metal materials. Without magnetic shielding, much of today's sophisticated electronic gear would be larger, less efficient and in some magnetic environments, impossible to function at all. As components are made more sensitive and packaging more dense, susceptibility to electromagnetic interaction increases dramatically even in the best engineered layouts.