C.h.u.d. Looking for info about scanner

[Contec]

I came across the trailer for the movie that made me an my sister have nightmares when we were kids.
I always liked the scanner they used, it has a really scary sound.
So now im asking if anyone know anything about that peticularu prop.
It's shown at 0:20

http://www.youtube.com/watch?v=WqDToaLuJ7I&feature=related