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
controlled by a seismic SENSOR.
Money Heist Season 3, Episode 3
The seismic SENSOR isn't emitting
any signal now.
Money Heist Season 3, Episode 8
...and the SENSOR apparatus will rest on it.
The Big Bang Theory Season 1, Episode 12