Both EMI and RFI cause similar effects, although EMI typically operates on lower frequencies than RFI. Read More…
Leading Manufacturers
Spira Manufacturing Corporation
San Fernando, CA | 818-764-8222Spira Manufacturing Corp. offers the most reliable EMI gaskets & shielding for the electrical / electronic industries to meet required EMC/EMI shielding regulations.
Sealing Devices Inc.
Lancaster, NY | 716-684-7600Sealing Devices is a leading North American distributor and fabricator of EMI shielding products, including conductive elastomers, Soft-Shield® low closure force gasketing, windows, conductive adhesives, formed-in-place parts, vents and elastomers.
Omega Shielding® Products
Randolph, NJ | 973-366-0080Omega Shielding Products is your premier source for high-performance, metal-stamped, fingerstock EMI RFI shielding solutions. An ISO9001:2008 certified manufacturer of EMI shielding and RFI shielding products, Omega offers an extensive line of EMI gaskets, rings and more to meet your specific needs. Omega Shielding Products maintains the highest levels of product quality and customer satisfaction.
Central Coating Company, Inc.
West Boylston, MA | 508-835-6225Central Coating is the largest applicator of coatings in the Northeast. We specialize in the application of EMI shielding, industrial, textured and conformal coatings; form in place gaskets, pad printing, silk screening and value-added operations. ISO 9001:2015 registered, Central Coating specializes in the custom application of EMI shielding material using robotic and manual application methods.
EMI enclosures, EMI coating, EMI gaskets and EMI filters are used as magnetic shielding to guard sensitive electronic equipment. EMI and RFI are created, by widely varying degrees, by everything which conducts electrical energy, including electrical wires, electrical appliances, computers and all electronic equipment. Signal-bearing electronic devices such as mobile phones give off RFI.
Normal electrical currents are disrupted when moderate to high levels of EMI or RFI are introduced; un-channeled electromagnetic signals and radio frequency waves can act as "noise", magnetically altering normal flow of electrical currents and impeding the flow of electrical energy.
Surface Mount Electromagnetic Shielding - Spira Manufacturing CorporationElectromagnetic shielding and EMI filters can be found in medical devices, computers, mobile phones, stereo systems, television sets, windows, vents, fabrics, foils and even walls.
Shielding sensitive electronic equipment from electromagnetic interference and shielding high EMI-emitting equipment from contaminating other equipment can be achieved by enclosing equipment in a conductive EMI absorbing material or by coating equipment or equipment enclosures with EMI coating.
Thus, electromagnetic shielding can be accomplished through evident physical objects, or through unapparent objects. Electromagnetic shields are also called magnetic shields, EMF shields or RFI/RF shields and may be made from conductive rubber, like nitrile or silicone, or metals with high magnetic permeability.
Metals such as nickel, copper, steel and aluminum are commonly used, although the industry standard magnetic shielding material is Mu-Metal®, an alloy of nickel, iron, copper and molybdenum.
Many industries depend on EMI shielding products to protect communication systems, in industries such as medical, telecommunication, stage production, sound production and many others.
Within circuit boards and CPUs, most problematic EMI comes from electromagnetic cross-talk between different components on the same board as EMI travels across wires and conductive materials.
