This is a sub-sonic impact SENSOR.
The Big Bang Theory Season 1, Episode 11
The seismic SENSOR isn't emitting
any signal now.
Money Heist Season 3, Episode 8
Now, you'll need to get the SENSOR
close to Sheldon's room.
The Big Bang Theory Season 1, Episode 11
to activate the motion SENSOR.
The Big Bang Theory Season 5, Episode 2
...and the SENSOR apparatus will rest on it.
The Big Bang Theory Season 1, Episode 12