Measures Extremely Low Frequency (ELF) magnetic fields generated by power lines, home wiring, computer monitors, office equipment, TVs, appliances, and many other types of electrical and electronic equipment.
In tests of gaussmeters by the US Environmental Protection Agency (EPA), our MSI gaussmeter ranked 2nd in a field of 15 gaussmeters for accuracy, better than EMF gaussmeters ten times as expensive (EPA Report 400R-92-010).