This is a sub-sonic impact SENSOR.
The Big Bang Theory Season 1, Episode 11
All right, you're close enough
to Sheldon's room. Deploy the SENSOR.
The Big Bang Theory Season 1, Episode 11
...and the SENSOR apparatus will rest on it.
The Big Bang Theory Season 1, Episode 12
controlled by a seismic SENSOR.
Money Heist Season 3, Episode 3
HOWARD:
Told you the SENSOR would work.
The Big Bang Theory Season 1, Episode 11