Breakthrough In Magnetic Shielding Flexibility GIRON Magnetic Shielding Film, which does not contain Nickel, is unlike any other magnetic shielding material available on the market today. Suitable for applications requiring high saturation and good permeability, it is both thin and strong, and unlike Mu-metal™ it is very tolerant to bending or shaping without losing is shielding properties.
Suitable for small shields on magnets, motors, speakers and appliances such as refrigerators, vacuum cleaners etc. Also great for lining car floor or firewall. Perfect for full or partial wall / floor shielding in rooms too! Can be glued, taped, nailed, screwed or riveted into place. Could even be used to make a (heavy weight) vest to shield a person's torso! Works with AC or DC magnetic fields (0-1000 Hz), and will tolerate temperatures from 32° to 122°F. Coating is UV sensitive, cover if installation is exposed to direct sunlight.
25.5 inches wide, 1 mm thick. Weighs 3.5 Kg/m˛ (about 15 pounds per 10 foot length). Edges are sharp!
GIRON (Cat. #A273) ............... $37.95 per linear foot
"The Best Material Available for Shielding DC, ELF & VLF Magnetic Fields"
Used for years in industry to shield delicate electronic components from EMFs, this 80% nickel alloy magnetic shielding foil is now available at affordable prices for home and office use. The thinner (0.004" thick) material is easy to trim with scissors and shape by hand. Thicker material offers better shielding performance but requires snips to cut. Can be formed into magnetic barriers on cellular phones, microwave ovens, doorbell transformers, VDTs, buried wiring, and more. With snug fitting shapes, get as much as 75% attenuation of the magnetic field with one thickness. Use multiple layers for even greater reduction. Foil is available in two thicknesses and can be ordered in any length. (We recommend the use of a gaussmeter to determine the proper shape and positioning of the magnetic shield, and to confirm that the fields have been adequately reduced.)
Magnetic Shielding Foil:
15" wide, 0.004" thick (Cat. # A276-15) .... $21.95/linear ft
15" wide, 0.010" thick (Cat. # A276-10) .... $31.95/linear ft
The 24" wide "stress annealed" plates offer good magnetic shielding and are also well-suited for forming into complicated shapes. The 30" wide "fully hydrogen annealed" plates offer the best shielding available (up to 10 times the shielding effectiveness of stress-annealed alloy) and should not be soldered, welded, or heated in any way. Hydrogen annealed plates have 2 small holes pre-drilled near one end which may be used for mounting. Because of size and weight, additional shipping charges apply.
The amount of shielding that you will achieve depends on many factors, including the size and shape of the shield. When using a flat shield on a wall, floor, or ceiling to shield a source of field that is close to the shield (within 8 inches), plan to cover an area that extends at least to the 2 mG line.
1- Using your gaussmeter, slide along the surface of the wall to locate the hot spot to be shielded.
Click here for a short instructional video on doing a magnetic field survery for shield design.
Another format of MuMetal®, great for Magnetic Shield Prototyping and for Joining Mag-Stop™ PlatesWhen you need more than one Mag-Stop Plate to cover an area, how do you handle the joints? Joint-Shield is the perfect solution! This is a generous .010" thick, fully hydrogen annealed magnetic shielding alloy with adhesive backing (rated 0 - 200°F) on one side. Simply butt the Mag-Stop plates tightly together, and "tape" over the seam with Joint-Shield high permeabilty alloy. This method offers much less bulk and better appearance than the old overlap technique and provides excellent shielding integrity. Simple to use: just cut to desired length with a heavy scissors, peel the protective backing and press into place! Joint-Shield can also be used by itself as an excellent magnetic shielding material when a 4" width and adhesive backing is desirable (wrap it around wiring and conduit, speaker magnets, even small appliances like shavers and hair dryers!). Joint-Shield can be shaped by hand, without the need for special tools, but watch the sharp edges.
4" wide. Specify desired length when ordering.
Paper Thin and Highly Effective Space-age technology has produced this unique ultra-high permeability (1,000,000+) magnetic shielding alloy. Unlike conventional Mumetal® shielding alloys which are nickel/iron based and depend on bulk for effectiveness, MetGlas is a cobalt based alloy which is only 0.00065" thick (that's 16 microns, a red blood cell is 8 microns across)! Thinner means less material is needed. Less material means less weight and lower cost. Easy to handle, too. Cut it with a scissors, shape it with your fingers, tape it in place. Flexible and tough, with moderate corrosion resistance, it can be used indoors or out. Near-zero magnetostriction means it can be flexed over and over without losing its shielding properties. Wrap wiring, pipes, switches, or electro-magnets. Make shields for your shavers, electric toothbrushes, hair dryers, alarm clocks or lighting ballasts. Even lay it flat (in our experiments, we saw nearly 90% field reduction when a 4" x 4" MetGlas shield was placed flat against an energized lamp cord). Note: This material tends to saturate easily and is not recommended for shielding strong magnetic fields. This is the material often used in Electronic Article Surveillance systems. Formula 2714AZ, supplied annealed.
Supplied as a ribbon, 1" wide. Specify desired length when ordering.
Also available in 1 pound spools (approx 500 lin ft), 1" wide.
Also available in 24 pound (11 Kg) spools (approx 12,000 lin ft), 1" wide.
Ultra-Light Weight, Wide Format, Flexible Magnetic Shielding
Combining high performance nanocrystalline magnetic shielding alloy sandwiched between layers of clear PET to achieve good performance and easy handling. Very light weight and flexible, easily trimmed with scissors this material will provide good magnetic shielding for moderate to low fields below 100 kHz. Tolerates bending very well.
Specify desired length when ordering.
FINEMET Full Roll (100 meters) (Cat. #A271-roll) … $5430.00 (about $16.70 per foot)
High Saturation Magnetic Alloy
First line of defense for shielding strong magnetic fields from magnets, speakers, small transformers and motors. Strong magnetic fields are harder to shield because they tend to "saturate" the shielding material. This 4" wide foil is a hefty .010" thick and has an exceptionally high magnetic saturation of 21400 Gauss and maximum permeability of 4000. Tin plated for excellent corrosion resistance and better conductivity, it can be soldered or painted. MagnetShield typically reduces fields up to a factor of 2 or 3 depending on size/shape of the shield. Can be used in multiple layers, and/or in combination with a higher permeability alloy such as Joint-Shield for higher attenuation. Annealing is not necessary with this material. For increased shielding effectiveness, consider the following strategies:
Applications Notes:
- The magnets will be attracted to the shield (this is true of ALL magnetic shielding alloys). If you want to shield 2 adjacent magnets from eachother, each magnet should have its own shield.
Click here for Specs on Magnet Shield
4 Inch Wide Ribbon:
Also available in larger dimensions:
Light Duty Economy Magnetic Shielding For small shielding job where you don’t need a high attenuation, this unique material is just the ticket. Only 0.010 inch thick, PaperSHIELD is flexible and can be easily cut with a scissors and shaped by hand into simple or very complex shapes. High saturation and moderate permeability make this ideal for shielding magnets. White paper on one side can be imprinted (by you), peel and stick adhesive on the other side permits easy and semi-permanent mounting almost anywhere. Magnets will stick to it nicely. Really great for experimenting. 36 inches wide. Made in USA.
PaperSHIELD (Cat. #A270) …....................… $11.95/ lin ft
Unique Shape for Unique Shielding Applications Do you have an application requiring Mumetal® in un-insulated wire format? We have it in two different diameters! Stress annealed Mumetal® alloy. Wind it, weave it, braid it. Create toroids, coils, chains or simply experiment with its unique properties! Be the first to create a truly magnetic shielded garment! Spool size varies between 1-2 pounds. Click here for Specs on MuMetal® Wire
Note:
Mumetal® Wire .005" diam. (Cat. #A275-5) ……….... $75.00/ lb
.025" diam. Mumetal® Wire End Rolls (only one of each available):
MµCord™
Breakthrough in Low EMF Wiring!!
At last, we are proud to offer wiring which actually reduces EMF emissions to extremely low levels. Patented design incorporates both of these EMF emission suppression features:
special internal wire configuration to maximize cancellation of magnetic field emissions: 2 hot, 2 neutral, and one ground wire
and shielded wrapping to completely eliminate electric field emissions!
The result is a high quality wire with the lowest possible EMF emissions (over 90% reduction compared to standard wire). Replacing existing wire with MµCord is likely to be much less costly, more effective, and probably more convenient than shielding.
Includes ground wire. Note: MµCord will not compensate for unbalanced current. Make sure you correct wiring errors when you re-wire with MµCord. Not UL listed for in-the-wall wiring applications. MµCord™ “Appliance cord style” for re-wiring lights and appliances, making extension cords, etc. 20AWG solid wire. Equivalent to 18/3 SVT, rated for 13 Amps, 300 Volts. Ľ inch outer diameter. Black. Specify length
MµCord (Cat. #A223) …..... $1.75 per foot
NEMA 5-15P: 3 prong grounded plug (Cat#A224P) … $2.25
Need more room at the end of your cords? This sturdy adapter converts one outlet into three. Uses standard North American 3-prong outlet. Handles up to 15A safely. Color/style may vary.
 lessemf@lessemf.com
Mumetal is a registered trademark of Magnetic Shield Corporation.
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GIRON is a woven, laminated material. Cuts neatly with snips or sheet metal tools, and can be used either flat or molded into shapes for best performance.
Now achieve excellent and affordable magnetic shielding in difficult situations! Mag-
Stop Plates are extra thick high-efficiency magnetic alloy (Mumetal®) plates, specially designed to
provide superior shielding for electric circuit boxes, side by side computer users, and any
situation where you need a flat shielding material on a wall, floor, or ceiling. Can be
mounted with ordinary nails or screws, or sandwiched between the studs and dry-wall.
Use zinc chromate primer before painting. In one application, we were able to achieve almost 95% attenuation of a
200 mG field!
Method:
Stack multiple layers to improve shielding performance. Maximum permeability: 170,000. Maximum flux density: 1.13T.
Only 0.12 mm thick (5 mil) and 470 mm (18.5”) wide.
MµCord™ can be used to make extension cords and appliance cords. Simply cut wire to desired length and add a plug to one end, or plug one end and socket on the other. Easy to do with a screwdriver, instructions included. Rated for 15A – 125V
These plugs are suitable for North America. Plugs and sockets for other countries can be used, but you must obtain them locally. Color/style may vary.
