also: センサ
A device that detects or measures physical properties and responds to them. Used in everyday and technical contexts.
This camera is equipped with a high-sensitivity sensor.
ドアの前に立つと、センサーが反応して自動で開きます。
When you stand in front of the door, the sensor reacts and opens automatically.
This sensor detects human movement.
When you stand in front of the door, the sensor reacts and the light turns on.
We installed a sensor at the entrance.
When smoke appears, the sensor activates and the alarm sounds.
accelerometer