Double Electrically Research and Development Applications Enabling Your Success " An ESCO Technologies Company

THE DOUBLE ELECTRICALLY ISOLATED CONCEPT The Industry’s Most Effective Shielding Technology Introduced by Erik A. Lindgren in the early 1950s, the Double Electrically Isolated (DEI) modular shielded enclosure concept provides the highest level of EMI/RFI shielding available for a variety of industrial, communications, and government applications. ETS-Lindgren’s DEI enclosures are designed to meet such high performance requirements as cordless and wireless repair, cellular system production, security, research, and EMI/RFI testing and calibration. Construction Principle Our full service capabilities...

Screen Enclosures Standard modular or custom DEI screen enclosures provide the maximum shielding performance available in a “hear-through, see-through” structure. Copper screen enclosures are used where absence of a sense of confinement or casual observation from the outside is available. The superior shielding characteristics obtained from ETS-Lindgren screen enclosures are primarily the result of DEI construction, which permits the screen to be used where solid double shield construction would ordinarily be used. Where required, exhaust fans or connections to existing air handling systems are...

Copper Screen A heavy 55.9 cm x 55.9 cm x .4 cm (22” x 22” x .015”) copper wire mesh is offered for applications which require the “hear-through, see-through” advantages of screen, with the best possible high frequency microwave and improved low frequency magnetic attenuation characteristics. Copper is recommended when maximum attenuation is required at frequencies of 1 GHz and above. 0.85 mm (22 Gauge) Galvanized Steel and 0.1 mm (3 oz.) Copper The combination of 0.85 mm (22 gauge) galvanized steel and 0.1 mm (3 oz.) copper provides the best combination of price and performance in a solid modular...

low frequency magnetic field attenuation characteristics in a modular enclosure. Coupled with an additional layer of 0.64 mm (24 gauge) silicon steel placed behind the copper, this material Four Shield DEI Enclosure Four shield enclosures use 0.82 mm (24 oz.) copper as an over layer on both inner and outer shields to provide the best combination of high frequency microwave and application maximizes the low frequency magnetic shielding characteristics. The enclosure achieves over 120 dB of shielding effectiveness from 14 KHz to 10 GHz. ELECTRIC FIELD ELECTRIC FIELD PLANE WAVE PLANE WAVE MICROWAVE...

Standard Construction The basis of ETS-Lindgren’s DEI construction is its unique patented design, which permits double shield enclosures to be assembled from individual panels. Panels are designed to accommodate a variety of shielding materials which are attached to a strong, non-conductive wood frame. When the shielding is overlapped and the panels bolted together, a resilient – as opposed to rigid – clamping pressure is applied, making it easier to achieve and maintain an RF tight seal. On midwall and ceiling panels, an angle bar clamping system is used which also provides additional structural...

Doors The ETS-Lindgren DEI door employs a number of unique proprietary and patented features which contribute to its superior performance characteristics and durability. All hardware and door seals are designed to maintain electrical isolation between the inner and outer shields. Doors are side hinged and supported by three heavy duty hinges to provide sag-free mounting, and have been cycle tested up to 25,000 operations. A three-point, rollerbearing latching system applies uniform pressure to two sets of spring temper, phosphor bronze con­tact fingers to provide leakproof seals for both the...

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