EMF and ELF Meters
These meters are widely used by ghost hunters today because they can be so helpful in finding paranormal activity. However, they all require a certain amount of familiarization and training. Remember that any equipment, no matter what model or brand, can give a false reading in the presence of the following:
Poorly grounded or unshielded structural wiring
Microwave ovens in use
Dimmer switches
Cellular phones in use
FM, FRS, GRS, and CB radio transceivers in use
Air conditioning and power system/stations
Television screens, plasma screens, and LCD screens
Computers
Power lines within 100 yards, especially high voltage (tension) towers and transformers
Fuse boxes
K2 EMF Meters
As in other fields of serious scientific study, one tool may be better suited for a situation than another. K2 meters have five LED lights that alert the user to different levels of electromagnetic field activity. These lights make using the meter in the dark a whole lot easier. The ghost hunter's theory about EMF activity is that manmade EMF will stay steady, while paranormal activity will produce peaks and spikes in the reading, because spirits emit a pulsing electromagnetic field. As soon as the meter goes to the second light, it is a definite indication of a higher than normal level of electromagnetic energy.
The Ghost Alert
We know that electromagnetic fields are always around us and that even humans are surrounded by electromagnetic fields. This meter compensates for this ambient field and will only give an alert when the field is above the human threshold or is significantly higher than normal. Manifesting entities will typically cause the meter to go all the way up to the highest level and make the meter readings spike. That's pretty exciting to witness.
The infrared motion detector and two types of EMF detectors are very popular with ghost hunting groups.
Photo copyright Melissa Martin Ellis, 2008.
Gauss Meter
Use these meters when sensitivity, ultra-fast reactivity, wide detection range, and audible tones are needed on an investigation. They are precision instruments designed for specific situations, and their unique qualities make them a great asset to the team. A single-axis gauss meter detects paranormal activity within an area by showing the “electromagnetic smog signature” such activity generates. These instruments are very accurate and fast. They respond twice as fast as their closest cousin, the CellSensor. A color-coded graph helps indicate the level of a field's intensity at a glance.
Gauss Multi-Detector
The gauss multi-detector also detects gauss fields, and this moderately priced meter is far more sensitive than most. It measures values in both electrostatic and electromagnetic scales independently and with high accuracy. Using a corresponding colored bank of LED lights and a field strength rating capability ranging from .00001 to 1.0 on both the electrostatic and electromagnetic scales, this device is a necessity for most serious investigators. Some models come with a built-in audible signal feature as well.
EMF/Gauss Meter, ELF Meter
This device detects electrostatic (Tesla) and electromagnetic (gauss) fields with extremely high sensitivity, and it has a very high range and accuracy of measurement. A frequency filter allows different frequency fields to be monitored separately, so both VLF/RF (very low frequency/radio frequency) and ELF can be measured. It features lights that give the user the ability to read results in dark areas. Both the RF and gauss meter portion provide audible sound and large flashing lights, which correspond to abnormal spikes in field strength.
TriField Natural EM Meter
These instruments are relatively expensive, sensitive, and easily damaged, so they are not feasible for many paranormal investigators. Designed to detect only what we would consider paranormal activity, they take most of the guesswork out of situations where the gauss, ELF, and ION detectors may leave investigators otherwise unsure of their findings. They are fairly simple to use and have the audible warning tone so necessary in dark areas.

