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Picture – ELF magnetic fields blocking foil

ELF blocking metal plats

The ELF magnetic fields blocking metal plats are similar to the ELF blocking foil, but they are not flexible and usually used only in the professional market. In order to install it and to apply it on walls you will need to drill holes and to screw the plates into the wall, ceiling and floor. The plates are heavy and are made from a verity of metals with different magnetic characteristics. There is usually the need to use several layers, each on with different magnetic polarization. Some of the materials blocks and some observed the ELF fields. These plates are more expensive from the ELF blocking foils and are usually used to block high magnetic fields between 20-200 mG and more.

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Picture – ELF magnetic fields blocking metal plats (Picture from dolev LTD)

ELF active protection system

ELF blocking Active systems – used in order to block a low frequency electromagnetic radiation field and to lower its level in a given point, but this is done by creating a second field in the same strength and in opposite direction to the one that was already there. In the point in which both fields are in the same strength you will be able to measure magnetic field of 0 mGause, but if you move towards one source (ELF original source or the active ELF blocker) the ELF levels will go up, they will still be lower than the original ELF source levels, but now they will be a mathematical sum of the two fields which are in opposite directions. This active system does lower the measured levels but I don’t think this actually reduce the health risk. I think it might even increase it since now your body is exposed to more fields from several directions.

We dont recommand using a ELF active protection system.

Picture – ELF magnetic fields active protection system  (Picture from dolev LTD)

Dirty Electricity filters

Dirty electricity is a mid frequency electric current noise (100- 100000Hz) that is carried over the electricity wires in your house and that is generated by electronic devices, electronic power convertors, RF equipment or external sources. The noise is carried around the house over the electricity wires and since the frequency is relatively higher the magnetic fields created by these currents mange to be emitted into the room itself and can be measured even 2 meters from the walls, in the middle of the room(compared with 50 or 60 Hz single that can be found and metered usually only very close to the wires, usually note more then half a meter).

The Dirty Electricity filters cut off these frequencies and ground them, so only the 50 or 60 Hz signal can be found on the wires. There for they limit the danger of exposure to the LF magnetic fields in your house between 100-100000Hz.

As a byproduct the filters emit low level ELF magnetic fields around them. These filters should not be installed next to places where people stay for long time. Usually 1 meter safety distance should be enough (sometimes more for EHS people).

It is recommends to test for dirty electricity (DR), with a special numeric meter, before buying any filters. It is also recommended to try and find the sources of the DR and to limit their use before installing the filters (in order to limit the number of the filters needed and by that saving money).

The installation is very simple, just plug it in to the electric power socket, and it is on.

I use them at home and in my work and they make me feel better. I remember having a burning sensation in my eyes after I moved to a new office. One day I brought my DR meter and one filter. The meter showed 1500 GS units. This burning sensation disappeared few minutes after I installed a single filter (level went down to 75 GS units), and returned few minutes after I uninstalled it.


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Picture – Dirty Electricity filters

Picture – Dirty Electricity meters