The P.K.E. Thermometer is a medical instrument modified to account for paranormal detection.
After Egon Spengler and Kylie Griffin cleared Dana Barrett and Louis Tully upon extracting the Terror Birds from them, Louis was taken into the adjoining laboratory for more tests. Kylie used the P.K.E. Thermometer on Louis and instructed him to not talk during the examination.
- The thermometer is connected to a modified version of the P.K.E. Meter seen in Ghostbusters: The Video Game (Stylized Versions) as evidenced by the look and the words on screen like 'P.K.E.' but lacking the wings and handle.