Electromagnetic fields are fundamental forces of nature, manifesting a very subtle form of materiality. They are communication paths, that can’t be seen with naked eyes, and yet are charging spaces with information and meaning. Considering media as medium to connect us to the unseen, let us imagine a ritual object with the power to reveal hidden frequencies in the surroundings, letting us perceive invisible data embedded within a place. A puppet with sensitive powers: a mediatic mediunic dispositif. Geist Detektion plays with the notions of psycogeography and tecnoxamanistic experience. A performance mixing pseudo science, fiction and horror movies.