Georgia Ghost Hunters

EMF meter, or ElectroMagnetic Field meter, is a scientific instrument for measuring Electromagnetic radiation.

There are many different variations of EMF meter, some of which are single axis and others tri-axis. Single axis meters are cheaper than a tri axis meters but surveys take longer because the meter only measures one dimension of the field. Single axis instruments have to be tilted and turned on all three axes, to obtain a full measurement. A tri-axis meter measures all three axes simultaneously but these models tend to be more expensive.

Most meters measure the electromagnetic radiation flux density, which is in simple terms the amplitude of the emitted radiation. And other meters measure the change in an electromagnetic field.

Electromagnetic fields can be either AC (Alternating current) or DC (Direct current). An EMF meter can measure AC electromagnetic fields, which are usually emitted from man-made sources such as electrical wiring and Gauss meters or magnetometers measure DC fields, which occur naturally in the earth’s geomagnetic field and are emitted from other sources where direct current is present.

The majority of EMF meters available are calibrated to measure electromagnetic radiation, which is alternating at 50/60Hz (the alternation frequency of US and European mains electricity)This is because in recent years people have become concerned about the long-term health effects of exposure to high levels of radiation emitted from some electrical appliances.

There are other meters which can measure field alternating at as little as 20Hz However these tend to be much more expensive and are only used to specific research.

Paranormal Investigating

The same device is also used widely by Paranormal Investigation Groups and ghost hunting groups. Critics contend that EMF meters are misused and misunderstood, citing that many groups believe an apparition emits an electromagnetic field and an EMF meter reading is evidence of paranormal activity.