Julia 
There is no single normal reading. What there is, and what this page publishes, is what a real house actually reads when somebody walks it with a meter and writes down what the display said. Right now that is one house: mine, measured over two evenings in August 2026 with two meters, logged with mode, … Read more
Yes, and it is the cheapest change you can make. But when I ran the full series with a tape measure, three of my four sources behaved the way the textbook says and one of them appeared to ignore distance entirely. That fourth result turned out to be the most useful thing I measured, and … Read more
A home has three different kinds of EMF, and they are not the same thing wearing different names. RF fields come from wireless signals, magnetic fields come from flowing current, and electric fields come from voltage sitting in a plugged-in cord. Each comes from a different source, needs a different meter setting, and behaves differently … Read more
An RF meter can only report signals inside the frequency range its antenna is built for, and that range is printed on the spec sheet in MHz and GHz. If a device transmits outside your meter’s range, the meter shows a low number or nothing at all, not because the signal is absent, but because … Read more
An EMF meter is a handheld device that measures electromagnetic fields, the invisible energy given off by things like WiFi routers, power lines, phone chargers, and kitchen appliances. Instead of wondering how much is around you, a meter puts a number on it. There are three main types: RF meters, magnetic field meters, and electric … Read more
The numbers on an EMF meter tell you how strong a field is at the exact spot where the meter sits. There are only three unit families you need to know: µW/m² for radio-frequency (RF) signals, mG for magnetic fields, and V/m for electric fields. Once you can read those three, the screen on a … Read more
SBM-2015 is the measurement standard used by building biologists, consultants who inspect homes for clients who want their exposures as low as reasonably achievable. For EMF, it grades sleeping areas into four bands, from “no anomaly” up to “extreme,” using targets hundreds to thousands of times stricter than the official FCC and ICNIRP limits. Here … Read more
EMF stands for electromagnetic field. It is energy that travels through space around anything electrical or wireless: your phone, your WiFi, your wiring, the power lines outside. All EMF falls into one of two categories, and the difference between them matters more than anything else on this topic. Ionizing radiation, like X-rays, carries enough energy … Read more
A three-axis meter measures a field from all three directions at once and combines them into one number. A single-axis meter measures in only one direction, so you have to rotate it to find the strongest angle. Both can give accurate readings; the difference is how much work you do and how easy it is … Read more