Topic summary
Ghost Trap

Extracted from the Wikipedia article Ghostbusters (franchise).
Technology
The Ghostbusters use a specialized set of equipment in the 1984 film, and all subsequent Ghostbusters fiction includes similar equipment to aid in the capture and containment of ghosts. Their equipment includes proton packs, used to subdue ghosts; ghost traps, used to capture ghosts; and P.K.E. meters, handheld devices used to detect psychokinetic energy. In addition to the main technology used in the series, a script draft for Ghostbusters III includes the Ghostbusters developing a machine to transport themselves to an alternate Manhattan to save New York.