How Do I use an EMF Meter?  How ghost hunters use EMF meters  An
EMF meter is an instrument that reads the fluctuation in
electromagnetic fields. You should always take preliminary EMF
readings at various places throughout the site. The locations of
power lines, appliances and other sources of electromagnetic
fields are also noted. Most normal readings are in the range of
9.0 – 30.0 on the EMF meter. These are typical EMF readings in a
home. Anything that registers in the 2.0 to the 7.0 ranges and
cannot be traced to a source is attributed to spirit activity.
An example of a source would be a computer monitor. The closer
you get to a natural source the higher the reading. A natural
source should always appear in the same place and will not
disappear. You should discard these readings.  When you get a
short EMF reading in the 2.0