DESCRIPTION: Ready-to-install SHIELD CELL and OMNI CELL panels provide maximum EMI shielding with minimum pressure drop (air flow resistance) for ventilating air. All styles are composed of metal honeycomb shielding panels in EMI gasketed frames of like material. Panels are ready-to-mount, in such a manner that the frame gasketing is compressed firmly against the shielded housing to maximize shielding performance. Standard framing for all panel designs includes both an EMI shielding gasket and a seal, from a combination of monel knitted wire mesh and sponge neoprene. Panels larger than 12 x 24 in. (305 x 610 mm) are equipped with cross braces.
SHIELD CELL Panels: Standard SHIELD CELL panel construction is all-aluminum, with 1/8 in. (3.2 mm) cells, 1/2 in. (12.7 mm) thick. The complete frame/ honeycomb assemblies are chromate conversion coated. Additional sizes available include: 3/16 in. (4.7 mm) cells, 3/4 in. (19 mm) thick; and 1/4 in. (6.4 mm) cells, 1 in. (25.4 mm) thick. Standard aluminum honeycomb is recommended for applications where shielding requirements are not severe.
For improved shielding Effectiveness and environmental protection, these light weight aluminum ventilation panels are available tin plated. However, in applications requiring maximum shielding levels and greater weight support, either steel or brass honeycomb shielded vents are recommended.
OMNI CELL Panels: OMNI CELL ventilating panels are high performance aluminum honeycomb units in Chomerics’ unique configuration. The OMNI CELL configuration eliminates the normal polarized shielding characteristics of conventional aluminum honeycomb, as do brass and steel panels. In place of the single honeycomb, two parallel honeycomb panels, each half the thickness of standard SHIELD CELL honeycomb, are contained in a single frame of standard
thickness.
Foil directions of the two honeycomb layers are at right angles to each other to eliminate non-symmetrical shielding effects. Each honeycomb layer contains 1/8 in. (3.2 mm) cells, 1/4 in. (6.4 mm) thick, for a total thickness of 1/2 in. (12.7 mm). The finished panel assemblies are chromate conversion coated. OMNI CELL construction is usually the best general purpose honeycomb vent. It provides significantly more shielding than conventional SHIELD CELL aluminum honeycomb, at only nominally higher cost
