Gauss Labs PEMF blog

Twenty PEMF spec sheet terms in plain words, each with what it tells you when you compare devices, plus four questions to put to the maker.

We measured our lab's Magnetic Pulser MP7 test unit at both settings. Here is what a full report shows beyond one peak Gauss figure.

A PEMF mat and a grounding mat can look nearly identical in photos. One is built around coils that make a changing magnetic field, and that field is what a lab can measure.

A few readings above the center show how quickly a field fades with height. A real five-height test shows what they leave out: how far the field spreads sideways, and whether it spreads evenly.

Three measurements describe what a PEMF device puts out: how strong the field is, how fast it changes, and how much heat the coil makes. Here's what each one means, using a device we measured.

Whoever draws a PEMF mat's field map decides how to fill the space between scan lines and where the color scale tops out. Here's how each choice changes the same data.

Buyer guides now say a sealed mat can't be checked. It can: the field sits in the air above the pad. See every test point and its Gauss value, at the height a body actually lies.

PEMF certification means two different things. One certifies a person who completed training, and the other certifies what a device and its accessory were measured to put out. Only the second describes the hardware you are buying.

The FEI is proposing to cut the permitted PEMF field at its events from 1,000 Gauss to 100, and to require battery power. A battery limits the current a device draws continuously rather than the energy it stores between pulses, so it does not set the peak field.

Some PEMF companies leave the peak Gauss value off the product page because one value on its own misleads. The reasoning is sound, but a blank spec sheet leaves a buyer with nothing to compare. Here are four values to publish beside a peak.