Helmholz Coils

A while ago we were contacted by a doctor who knew a lot about field lines in electromagnetic coils. He was actually using a device which came with 2 coils each with a 2" diameter and was under the impression that the electromagnetic field lines penetrated the area between the two opposite placed coils with a homogeneous (read: an evenly spread) field intensity, independent of the distance between them.

He was wondering if this could be true as he was not able to understand how it was possible that changing the distance between the two coils should also change the field lines behavior?

The German scientist Helmholtz designed a device to produce an almost uniformly electromagnetic field by placing two coils opposite to each other under specific mechanical and electrical conditions.

In response to this doctor's question, we explained to him that he was correct and the so called Helmholtz configuration can be obtained only under specific conditions. Working with two coils with relative small diameters will only cover half the distance of each coil diameter between them to obtain a uniform electromagnetic field. Because did not only want to treat small body area of his patients, like fingers and hands, but also larger body parts like arms, legs or even stomach, he reasoned that he needed a system with large coil diameters in order to be able to treat the whole area between the coils with the same electromagnetic field intensity. This is only possible by using a Helmholtz configuration.

Our discussion resulted in us creating a very special coil set-up for him, which worked beautifully in pure Helmholtz configuration. The generated electromagnetic field lines were now going through the complete stomach of the patient with the same intensity! Here follows some explanations on how this works.

Helmholtz coil configHelmholtz coil perpendicular

 Helmholtz coils distancesHelmholtz coils distances

In the picture at the left side there are 2 coils which are are wired in series. This means that the electrical current from the source goes into the first coil, comes out, then goes into the second coil in the same direction, comes out and returns to its source. The resulting magnetic field lines leave the coil perpendicular (= at a right angle to the coils) in the direction of the line marked X.

However, if we want to obtain an evenly spread electromagnetic field, where the intensity is completely equal between the whole area between the two coils certain conditions must be met.

The distance between the two coils must be equal to half of the diameter of the coils, see the red arrows.
This explains why it is impossible that an even field can be obtained when using two 2" coils opposite to each other if the distance is more than half the diameter of a coil. As such the electromagnetic field distribution is already disturbed when the distance in between 2" coils exceeds more than an inch!


Helmholtz field linesHelmholtz field lines


The picture at the left side shows how to obtain an evenly spread PEMF intensity through the body.

The area between the two coils (between the tips of the two green arrows) is equal in intensity because the field lines are now traveling straight between both coils. Having said this, however, a distance of at least 9 inches must exist between the coils, which in turn requires coil diameters of at least 18 inch! Remember the red arrows above?

This not only requires a very large coil area but also sufficient power to be able to "bridge" the distance between these two coils. To generate the amount of power required for such large coils we need a strong electrical current, thus requiring a very powerful pulsed electromagnetic PEMF generator.





Ultimate PEMF therapyUltimate PEMF therapy


So how did we solve these problems? We created two separate 20 x 28" therapy pads (1.5" thick) with color coded top and bottom sides. Each pad contains a very large flat coil and both are now connected in series to the very powerful Curatron 3-D device.


The result can be seen in the picture to the right. The pulsed electromagnetic field has an intensity of more than 400 Gauss equally spread over the whole area between the coils. For instance, place one pad on top of the belly and the other one under the spine and you have the ultimate PEMF therapy you will not find with any other manufacturer!








PEMF treatment with Helmholtz pads
PEMF treatment with Helmholtz pads

Here follows an excerpt from the email we received from this doctor after using our high power device with the Helmholtz therapy pads for a couple of months:


I think the Helmholtz configuration works excellently to provide a more uniform signal from top to bottom.
I tried the Curatron myself 4-5 days/week for two months. While using it, I noticed I seemed to be more positive minded, and felt temporarily "better" in a difficult to define way. I theorized that the communication pathways in my body were being unblocked, and perhaps this accounted for my feeling less discouraged, more encouraged, and more that things are going to work out okay.


I appreciate your efforts to provide an excellent device for people to try for their health needs. I think your equipment is fantastic in quality and function. When my brother first got his Curatron, I took my Trifield meter to his house and was able to measure the signal of the pulsing magnetic field 13 feet away from the coils. I was very impressed!