What is the voltage output of a PEMF/Magnapulse unit?

I’ve defined this pre­cise­ly in this arti­cle:


This arti­cle clar­i­fies the often con­fused elec­tro­mag­net­ic char­ac­ter­is­tics of res­o­nant ver­sus pulsed devices. Many ven­dors inac­cu­rate­ly describe and mar­ket “res­o­nant” devices as “pulse” devices.

On a Magnapulse, the inten­si­ty knob varies the “volt­age,” hence the pow­er. Higher pow­er stores more ener­gy in the capac­i­tor which results in a greater cur­rent, which caus­es a stronger “pulse” with more ener­gy.

At low pow­er lev­els, a small spark gap releas­es less ener­gy per pulse. Each 200 ns pulse fires at about 2KV, and has around 500 Amperes of instan­ta­neous cur­rent (esti­mate). At all lev­els, the mag­net­ic field is a func­tion of both the instan­ta­neous cur­rent, and the mag­net­ic geom­e­try of the probe, which relates to the “shape” and the num­ber of turns. At low lev­els with the but­ter­fly probe, your unit cre­ates about a 200 ns pulse, with about .25 Teslas of field. The wave­form dis­cus­sion under “Ringers” sec­tion of the arti­cle describes your device accu­rate­ly.

At high pow­er, the pulse cur­rent reach­es around 10,000 Amperes, which, depend­ing on probe geom­e­try and induc­tance, cre­ates a field rang­ing from 5 Teslas to 10 Teslas (zeta probe).

In a pure sense, MagnaPulse is nei­ther AC or DC, it is both. It works by briefly cre­at­ing a 200 nanosec­ond DC pulse; a recur­ring DC pulse is tech­ni­cal­ly an AC sig­nal. So in a sense, it is both.

The volt­age out­put is not an appro­pri­ate mea­sure­ment. The units for mag­net­ic fields are Gauss and Tesla. A Tesla is 10,000 gauss. A chang­ing mag­net­ic field (as with a pulse) has the poten­tial to cre­ate or induce a volt­age but has no volt­age by itself. The cou­pling between a field and near­by mate­r­i­al (tis­sue), pro­duces induc­tance, which caus­es an elec­tric­i­ty to run back­wards in the near­by mate­r­i­al.

This “back­wards” elec­tric­i­ty — in the “pulse” for­mat — is what pro­duces the effects you observe with your device. So the func­tion­al­ly cor­rect mea­sure­ment is that your device is a ~200ns, 5 Tesla pulse which is indi­rect­ly deter­mined by the probe geom­e­try, and pow­er capac­i­ty of your unit, and how the probe is cou­pled to the tis­sue.