|Type||Multi-functional scanning device|
|Good or Evil||Good|
|Appearances||Scanner Watch (Appearances)|
The scanner watch was a device used by Sarah Jane Smith to detect alien life, and could identify the species and origin of that life. Superficially, it appeared to be a normal wristwatch, but the face of the watch concealed a scanner screen. Like her sonic lipstick, it was left by The Doctor for Sarah Jane inside K9.
- The scanner watch could scan for alien life and technology. (Secret of the Stars, Enemy of the Bane, Prisoner of the Judoon, Mona Lisa's Revenge) Like a geiger counter, it made louder noises as it got closer to an alien source. It was capable of connecting to the local power grid and never lost power. (Revenge of the Slitheen)
- Sarah Jane also used it to try and determine what was causing the ghosts at Ashen Hill Manor. However, it simply read that it was neither Human nor alien and that it was dormant. (The Eternity Trap)