EMF Detector
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EMF Detectors are Gauss meters that respond to localized gradients in electromagnetic field intensity. They are very popular in the tangentially connected fields of electrical power technology and also the pseudoscience of "ghost hunting" or other paranormal research.
Their indicators are usually calibrated in milligauss. EMF is an acronym for Electromagnetic Field or, colloquially, Electromotive Force. In absence of moving magnetic field, an ideal meter will read 0 milligauss. Uncalibrated meters often read slightly off zero. Industrial EMF Detectors will often read 2-3 milligauss when placed in an open field not near, for example, power lines (either overhead or buried).
High electrical activity can send some meters into overload with unpredictable readings. Paranormal researchers have often reported unexplainable wild meter swings.
