How do EMF meters work in relation to Paranormal Investigating?

The theory is that spirits need energy to manifest and an EMF meter may be able to detect this energy.

Virtually everything has a measurable electro-magnetic field related to it.  Think of it as energy in motion.  A light that is off with have a lower EMF signature than a light that is on.  For an event (paranormal or otherwise) to occur, energy must be applied.

A reading of 1.3 or 1.8 does not necessarily mean anything.  What is looked for first is a baseline reading for the area/room.  This baseline reading may be 0.1 or it maybe be 10.0 or higher.  A spike or possible event would be anything that rises above the baseline and seems to stay higher for a while.  In some cases, this higher reading may seem to drift around like a bubble.

If your baseline is 1.3, a reading of 2.3 or higher may be a spike indicating an event.  If the readings get into the high double digits or higher, then the electro-magnetic field may actually be affecting your brain, causing hallucinations.

The mistake that is often made with EMF meters is that users forget that they are sensitive.  Simply moving the meter in your hand or someone walking in front of it can create a spike.  An appliance in another part of a house can switch on causing a spike to occur along the entire length of the wiring for that appliance.  Lightning strikes from a storm you are not even aware of, may cause the meter to jump.

Make sure you have your base readings written down, so you are aware of any variences during an investigation.  Also, when using any EMF meter.. make sure to list where you were in the room (i.e.  I was in the middle of the room when I got a spike of 3.2, or .. I was next to the TC when I got a spike of 3.4, etc.).  This comes in especially handy if we are unable to cut the power in the building we are investigating.