MAGNETIC SHIELD CORP. Lab Kits PART NO: LK-120 SHOWN MAGNETIC SHIELD CORPORATION Perfection Mica Company 740 N. Thomas Drive Bensenville, IL 60106 U.S.A. E: [email protected] P: 630-766-7800 F: 630-766-2813 www.magnetic-shield.com EVALUATION KITS FOR Science Research Development Design Engineering Construction

Lab Kit Internet Special Save 10% “HANDS-ON” EVALUATION Global businesses, engineers, scientists, inventors, educators and homeowners in over 80 countries have used our Lab Kits and shielding materials for hands-on evaluation. Our Lab Kits, which contain various samples of our proprietary shielding alloys and technical information, have helped many individual consumers and technical professionals solve unwanted magnetic interference from low frequency AC source fields (Ø Hertz to 100 kiloHertz). Although the evaluation process can vary by application, the following steps are generally followed...

MAGNETIC SHIELD CORP. FORMULAS AND DESIGN CONSIDERATIONS SATURATION OF SHIELDING MATERIALS µ = known permeability of the shielding alloy (at flux density B) t = thickness of shielding alloy (material selected from the Lab Kit) D = diameter of shield (approx. cylindrical size required to shield affected component) ATTENUATION RATIO OF DESIGNED SHIELD 10 .0001 The shielding efficiency of a magnetic shield is specified as the Attenuation Ratio (reduction ratio). This is the ratio of measured field before shielding to that measured after shielding. Attenuation, measured in decibels (dB), is simply...