There are Three Main Types of Electromagnetic Fields…
By Michael R Neuert © 2012
There are three main types of electromagnetic fields (EMFs). All three have been linked to important biological effects in the scientific research studies, and each type of EMF is measured with a different kind of test instrument…
ELF Magnetic Fields
ELF Magnetic Fields are the EMF component most often linked to serious health effects – such as childhood leukemia and other cancers – in the research studies. Common sources include power lines, electrical wiring, light fixtures, appliances and most other electrical devices. Wiring errors and stray electricity in pipes can sometimes create surprisingly high levels. Magnetic fields are measured with an ELF* gaussmeter, in units called “milligauss” (mG).
(*Note: “ELF” or “extremely-low-frequency” is the scientific name for the EMF frequency range that includes the 60 cycles-per-second – or 60 Hertz – electricity used in the US and Canada.)
ELF Electric Fields
ELF Electric Fields have also been linked to important biological effects, but have been studied less in the research. Anecdotally, they are often involved when people feel “sensitive” to electromagnetic sources. Electric fields are usually caused by hidden electrical wiring within walls, by nearby power cords for lamps and devices, and sometimes from overhead power lines. Electric fields induce measurable voltages onto the skin, which are easily detected with a Body Voltage Meter, in units of “AC Volts” (VAC).
Radio Frequency (RF) Fields (including microwaves)
Radio Frequency (RF) Fields (including microwaves) have been linked to several kinds of tumors and health problems. RF fields are emitted from many wireless and electronic devices – cell towers, cell phones, cordless phones, TV/radio broadcast towers, Smart Meters, Wi-Fi, wireless computers and components, baby monitors, microwave ovens, radar, etc. In the US, they are usually measured in units of “microwatts per centimeter squared” (μW/cm²).
(In many cases, the ELF electric and magnetic fields will also carry some added RF frequencies due to the use of dimmers, fluorescent lights, computers, Wi-Fi, Smart Meters, etc. This is called “Dirty Electricity”.)
Download pdf – Information about EMFs and Safety Levels