Benefits of a PEMF Machine with Dual Coils
Do Two PEMF Coils Work Better Than One?
Does a PEMF machine with two applicator coils work better than one with a single coil?
In many situations, the short answer is yes—although the full explanation requires a bit more context.
Why might two coils perform better than one?
To understand this, it helps to examine how PEMF systems generate and distribute electromagnetic fields across the body.
Why Dual Coils Work Better?
To answer this, it helps to first understand how PEMF coils behave electrically.
Nearly everything in nature offers some resistance to the flow of electrical current. Materials such as rubber or glass resist electricity so strongly that current can pass through them only under extremely high voltage; these materials are known as insulators. Other materials—such as copper—allow electricity to move through them easily and are called conductors. Even good conductors, however, still possess some electrical resistance; achieving truly zero resistance is extremely difficult outside of specialized superconducting conditions.
Electrical resistance is measured in ohms (Ξ©) and is described by the relationship between voltage, current, and resistance:
R = V / I (or V = IR)
In this formula, R represents resistance, V represents voltage, and I represents electrical current. In a PEMF device operating at a given frequency and power level, the voltage supplied by the driver circuit remains relatively stable. Each electromagnetic coil has its own inherent resistance determined by the length, thickness, and material of the wire used to construct it.
When an additional coil is introduced into the circuit, the electrical resistance of the system increases. According to the relationship above, if voltage remains constant and resistance increases, the electrical current flowing through the system decreases. In practical terms, adding a second coil changes how electrical energy is distributed through the circuit, which in turn affects how electromagnetic fields are generated and delivered by the PEMF system.
A little more math…
B = NI/2R where
B is the strength of the magnetic field, and N is the number of turns in a coil.
I is the current going through the coil in amperes, and R is the radius of the coil
The formula suggests that an increase in N and I will also increase B
Let’s calculate V using some numbers.
The resistance of a single coil is 0.8 ohms, and if assume the current to be 20 amperes
V = 20 * .8 = 16 volts
Now if we keep V constant at 16, what happens when we add the second coil:
16 = I * (.8 + .8)
I = 10 amperes
So, this the current from one half!
(But 0.8 is extremely low resistance and it needs to be at least one. So, to rectify it, we add 0.5 ohms of resistors)
16 = I * (.8 + .5) = 12.307 amperes for a single coil
16 = I * (.8 + .8 + .5) =7.619 amperes for double coil.
Now, when we consider the second formula B = NI/2R…
When we add the second coil, the N increases, resulting in a higher value of B.
This means…
Adding two coils close to each other produces a significantly stronger magnetic field than just a single coil.
Another major benefit:
The magnetic field is strongest in the center of an electromagnetic coil. Some may also call the center the sweet spot.
So, when two coils are stacked together, the sweet spot elongates. This sweet point will continue to stretch. This means when you use two coils on each side of your body, the sweet spot is in the core of your body, unlike on either side of the body when a single coil is used.
Other Benefits of Dual PEMF Applicator Coils
Here are some other benefits of using two coils:
Sharing is Caring
The first significant benefit of dual coils is that you can share it with someone with the same problem, where both of you can use single coils simultaneously.
You can share the session with someone else. You just need to remember to turn up the volume to compensate for the signal being shared by the two coils so that each coil has the same magnetic strength as a single coil would have in one coil therapy session.
Say Yes to Blood Circulation with dual coils
The dual coil system can help in the circulation of your blood pretty smoothly.
How? Place one coil about a quarter of your height from your head and the other coil a quarter height from your feet, and that is it.
This placement of coils spreads the magnetic field in the entire body.
Works for two different issues at the same time
Diabetes and neuropathy together? No worries. With the dual coil system, you can heal both diseases together.
How? Very simple, for diabetes, place one coil on the stomach, and for neuropathy, place the coil by your feet.
Though both the coils will be creating the same magnetic field, they will be healing two different diseases simultaneously.
The Sentient Element Dual Coil 2500W PEMF Device
For clinics seeking a reliable, versatile PEMF solution, the classic 2500W Sentient Element Dual Coil PEMF Device offers a powerful combination of performance and practicality. Its expansive 7–10,000 Hz frequency range allows practitioners to implement a wider variety of protocols than standard 1–50 Hz systems, while its 350 Gauss peak continuous output delivers consistent field strength suitable for professional settings.
The dual coil configuration supports broader coverage and efficient session flow, making it well-suited for busy clinical environments. Compact and portable, it integrates seamlessly into treatment rooms without requiring complex installation or excessive space.
For practices looking to expand their service offerings with a flexible, high-capacity PEMF system, the Sentient Element classic provides the range, output, and reliability clinicians expect
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