The lower frequencies produce non-ionizing radiation, while the higher frequencies produce ionizing radiation. As a result, high frequencies are more likely to cause problems and interfere with sensitive devices, while low frequencies are more likely to cause health problem concerns for individuals. 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. We have been providing reliable, cost-effective EMI & RFI shielding solutions for over 30 years, and to this day we continue to provide EMI products with innovation & expertise. Spira is an AS9100 and ISO 9001:2008 certified company.
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 as well as elastomers, pads and tapes used for managing related thermal applications. The company is ISO 9001:2008 registered.
Orbel Corporation
Easton, PA | 610-829-5000Orbel's design and manufacturing process enables unique engineered solutions for a variety of applications. Orbel offers today's most effective EMI/RFI shielding, photo-etched precision metal parts, precision metal stampings, and electroplated metal foils. Areas of specialization include aerospace, telecommunications, electronics, medical, automotive, and manufacturing. Orbel is ISO 9001-2008 and AS 9001-C Certified. For more information, visit Orbel.com or call 610-829-5000.
Select Fabricators, Inc.
Canandaigua, NY | 888-599-6113Select Fabricators, Inc. manufactures flexible packaging, cleanroom assemblies, and portable EMI shielding enclosures as well as contract product assembly and fulfillment for aerospace, medical, death care and industrial customers.
Seal Science, Inc.
Bethlehem, PA | 800-576-7325Seal Science, Inc. (SSI) is an industry leader in design engineering and precision manufacturing of materials and components for critical sealing applications and advanced technology systems. SSI provides cutting edge technological solutions for mechanical and electrical systems; including structural subsystem design, signature management and electromechanical interference (EMI) shielding products. Contact us for more information!
MWT Materials Inc.
Passaic, NJ | 973-928-8300We are space-qualified. Located in Passaic, New Jersey, we cater to the needs of numerous technology intensive industries including the US Government and its’ contractors. MWT Materials (and our predecessor, Millimeter Wave Technology) has been active in the research, development, analysis, and manufacture of radar absorbing materials and coatings (RAM) since the early 1980’s.
Co-NETIC® Braided Sleeving - Magnetic Shield Corp.Some examples of sensitive devices that may require EMF protection at high frequencies include communication devices such as cell phones, security systems, wireless Internet, radios, baby monitors, televisions and computers. Devices for wireless communication are particularly at risk.
At low frequencies, sensitive devices such as plug-in devices, pendants, power lines, building wiring and tabletop products will most require EMF protection. A few examples of health problems that research has shown to be connected to low frequency EMF exposure include childhood leukemia, adult cancer, chronic pain, fatigue, nausea and headaches.
The two different frequency levels of EMF act in distinct ways. High frequency EMF behave in much the same way as light beams, in that they do not bend but reflect off of surfaces instead.
At these frequencies, typically above 300kHZ, electric fields and magnetic fields cease to be separate entities and become combined to form electromagnetic fields. Low frequency EMF, on the other hand, behaves quite differently. At these frequencies, which are below 300kHZ, the electric fields and the magnetic fields remain separate.
Instead of acting like light beams, these frequencies behave much more live sound waves. That is, like sound waves these frequencies will bend around corners and quickly become distorted when reflected. As a result, these frequencies are much easier to block than high frequency EMF because they typically travel straight from the source to the closest ground. There are many different methods in which the harmful effects of both of these types of EMF can be prevented.
Some typically EMF protection products include shields, filters, gaskets and enclosures. One of the most common materials used to make these products is Mu Metal, which is a nickel-iron alloy that is 77% nickel, 15% iron and a small amount of both copper and molybdenum. Alternate materials include Molybdenum permalloy, Sendut, Hipernom, polyurethane foam, epoxy resin and supermalloy.