Movement sensor

 was a sensor that could be triggered by any movements, even by a flinching. (TV: Fugitive of the Judoon)

In 2020, movement sensors were located around ""'s house in the Outback. (TV: Spyfall) Later this year, Jack Harkness stole a spaceship that had movement sensors. These sensors could set off the laser spikes when triggered. (TV: Fugitive of the Judoon)