Beam Breakers - Sets off an alarm if the beam is broken between a transmitter and receiver box.

Additionally psychic investigation tools are sometimes used by certain investigators. There is as yet no scientific proof that these tools actually work in any way what-so-ever, but some people will swear by them. Equipment can include dowsing rods, pendulums, oiuja boards and more.

Infra Red Thermometers - Measures temperature using a laser pointer which is pointed at the desired object without any psychical contact.

Night Visions CCTV Cameras - Placed around haunted locations and often monitored and recorded from a laptop computer.