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.

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.

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.

PEMF spec sheets have started publishing a slew rate, usually in tesla per second. Here are the four facts that have to sit beside it before you can compare two devices.

Three PEMF certifications went on the public Gauss Labs registry in August. Here is what went up, why one device and two accessories produced three separate listings, and how to check a certification badge yourself in about a minute.

Two PEMF discs can look identical on the outside and still put their strongest field in completely different places. Our 3D field viewer is now open to anyone, with a page for each of the four common coil types built from a real measured scan.

New in the 3D viewer: slice the measured field open with a movable cross-section, scrub the pulse to any moment, and set a full-scale person on the mat to see depth and coverage.

Every example report now includes an interactive 3D viewer of the measured field: a field dome for reach, a new topographic map for strength, and the device's real pulse.

A PEMF field does not stop at one line. It fades from the center, and two boundaries, the strong core and the usable edge, describe what you actually get.

June's newly certified PEMF products: the CELLER8 device and two accessories, each active and verifiable on our public registry.