GVDA GD189 EMF detector (Electromagnetic Field) tester is used to measure the radiation of an electromagnetic field. An Radiation Detector EMF is a combination of an electric field and a magnetic field combined with electric fields found on most electrical appliances when plugged into an outlet. A magnetic field is created when the appliance is switched on at the outlet. EMF testers are used to diagnose any problems with electrical wiring, power lines and electrical shielding effectiveness.
