WORLDWIDE
MANUFACTURER
andDISTRIBUTOR
Since
1941Magnetic Shield Corporation, a
division
of Perfection Mica Company, is the premier supplier of custom magnetic
shielding
alloys and custom Built
shields.
Measuring Magnetic Fields
How do you "see" magnetic fields? By using a Gauss Meter, the electromagnetic source field strength is measured in "Gauss", and output into numeric values. An example of measuring gauss before and after shielding an electrical panel with our MuMETAL® alloy can be seen on our YouTube Video.
Evaluation
We offer a cost effective, handheld, single-axis AC magnetic field meter, to provide quick & reliable measurements of electromagnetic field (EMF) radiation generated by external sources like power lines, electrical wiring, audio/visual equipment, motors and other devices. No probe is required - just hold the Gaussmeter in the affected area. Then take measurements again after shielding with MuMETAL®, Co-NETIC® or NETIC® shielding alloys.
BH Curve Over several decades, Magnetic Shield Corporation has performed hundreds of laboratory tests and calculated thousands of shielding equations - all in an effort to continually validate the theoretical application of magnetic interference control in both AC and DC applications, and to aid engineers in shield design. Theory behind the B-H curve is well documented, and it remains an effective reference tool. By use of the B-H curve, our shielding alloys MuMETAL®, Co-NETIC® and NETIC® have been developed and refined to offer the most effective shielding characteristics for a variety of applications and markets. The B-H curve (left) depicts our materials' capabilities to attenuate and absorb a wide range of magnetic fields.
DC µ @ 40 gauss 80,000
DC µ @ 100 gauss 105,000
DC µ maximum 350,000
DC Hc 0.0005 Oe
DC Br (gauss) 4,000
AC 60Hz @ 40 gauss 65,000
*Data are typical of .014" [0.36mm] annealed sample and should be not be construed as maximum or minimum values for specification or final design. Data for each material thickness and/or lot may vary.
MATERIAL PROPERTIES:
TYPICAL ANNEALED PROPERTIES
0.2% Yield Strength 49ksi (338 MPa)
Density 0.316 lb/in³ (8.7 g/cm³)
Tensile Strength 99 ksi (682 MPa)
Electrical Resistivity 60 micro-ohm cm
Elongation 32% in 2" (51 mm)
Grain Size ASTM 7 or finer
Hardness 15T 85
