Ghost detectors for sale
Japanese company SolidAlliance has released its GhostRadar, a portable ghost detector/USB memory drive that can detect electromagnetic fields, as well as sense body heat.The company even has a forum on its website where people can report their parapsychological findings. For those who like an alternative, there is an old-school electromagnetic field meter available from Trifield for $179.
Electromagnetic fields have been known to alter perception by affecting the brain. People in areas with high EM concentrations sometimes experience hallucinations or have eerie feelings that go away when they leave the place. This has led some parapsychologists to propose that these fields may be ghosts or some other spirits, in turn sending them on ghosthunts for hotspots of EM activity in search of evidence. Now you can be a ghosthunter too. Who you gonna call?

GhostRadar, SolidAlliance.
TriField Natural EM Meter, TriField