Sensor

Dalek casings were equipped with sensors, including sensor plates, (TV: Planet of the Daleks) optical sensors, aural sensors, sensor globes or sensor pods. (PROSE: Remembrance of the Daleks) K9 models possessed olfactory sensors. (TV: The Gift, The Eclipse of the Korven) In a parallel universe, the Starfleet vessel USS Enterprise (NCC-1701-D) possessed visual sensors. (COMIC: Assimilation²)