Hyper-Ionization Device was a device Rowan would put at a given location to attract and amplify paranormal; in the 2016 movie.
The first device was seen at Aldridge Mansion Museum below a dresser near the basement door, which activated Gertrude Aldridge. The second device was found at the Seward Street Subway Station on the wall in the tunnel. It activated the Electrocuted Ghost. The third was found by the Ghostbusters at the Stonebrook Theatre in the Wardrobe Room. It activated Mayhem. There were likely more placed around the city. Rowan used the devices and the Barrier Compromising Master Machine to charge the Ley Lines.