The LED light bar scale measures from 1.5 to 30 milliGauss. The pick-up coil is located in the tip of the unit which can be rotated for increased directionality. There are many Federal Government Publications available. And public information from nonfederal sources. Power lines, electrical wiring, and appliances all produce electric and magnetic fields.
EMFs are invisible lines of force that surround any electrical device.
Electric and magnetic fields have different properties and possibly different ways of causing biological effects. However, both electric and magnetic fields weaken with increasing distance from the source. Even though electric and magnetic fields are present around appliances and power lines, more recent interest and research have focused on potential health effects of magnetic fields. This is because epidemiological studies have found associations between increased cancer risk and power-line configurations, which are thought to be surrogates for magnetic fields. Laboratory studies have shown that EMFs can affect living cells but it is unclear whether these effects are harmful.