Sensor
Definition 1 of 3
Pro Tip 1/3
Detect and Respond
Sensors are not just passive; they actively respond to changes they detect. The floodlight turns on automatically because its sensor responds to movement.
Pro Tip 2/3
Various Forms
Sensors can be visible gadgets or hidden within devices. Cars have multiple hidden sensors to monitor engine performance.
Pro Tip 3/3
Technical Vocabulary
The word 'sensor' is often found in technical or specialized discussions. During the tour of the space station, the guide explained how each sensor worked.