I don’t know if this has already been addressed here, but what happened here? All the books in the box kit used this design for the Giga Meter. I would just discount this as either a bad translation or misinformed guess, but the color book in the kit also recounts the scene with Ray driving crazy and the Statue of Liberty being put back. I think the information in the kit is based on the storyboards for Ghostbusters II (and early ones at that). So what is going on here?
Update
I don’t know if everyone here already knows but this information is not included on the Gbfans equipment page as far as I can see.
This device appears to look like a type of “Radiation Detector Geiger Counter”. Google Search
It doesn’t look perfectly like any on the results, but some look similar to the device above.
the giga meter was supposed to look totally different. the early version was designed by steve dane for the film and the production had gotten a quote to have it built. i’m guessing it was way cheaper and faster to rent the film-used version from modern props.