EVP (electronic voice phenomena)
Disembodied voices and sounds picked up by recording devices.
Digital infrared camera
Captures images invisible to people. Images are feed processed by a computer for examination.
Thermometer
Gives you a temperature reading of a cold spot when a spirit is trying to manifeast making the air cold.
K-2 Meter
A device, specially calibrated for paranormal investigations, that measures magnetic fields. Some believe it can be used to train a spirit to intensify its magnetic field as a form of communication.
Electromagnetism
(also, electromagnetic field, or EMF ) — A force given off by electric charges; found in anything that uses electricity. Some believe spikes in electromagnetism can be tied to paranormal activity.
Dowsing rod
A Y-shaped rod or two L-shaped rods; used in searches for underground water, discovering the location of unmarked graves, determining the sex of unborn children and locating ghosts.
Thermal-imaging digital camera
Records images of long-wavelength infrared (IR) radiation, sometimes referred to as heat, which is invisible to people. This allows the capture of images in even total darkness, or through smoke or fog.
Night vision camera
Able to record in complete darkness which the eye can't see.