G.H.O.S.T.S. of Raleigh utilizes the following very basic instruments:  

Motion detectors

Laser grid pen (washer used to hold button down)

T.O.P.S. (Trigger Object Proximity Sensor)

EMF meters 

Olympus WS-311M digital voice recorders

Sony ICD-SX750 digital voice recorder 

Flip video camcorder

Nikon D3000 digital camera 

Sony digital DCR-SX63 camcorder 

Infrared laser thermometers  

Infrared video camera 

Two way radios 

What's the most important piece of equipment?  The investigator.