Say what a sensor is
What a small sensor notices, and what it does about it.
A sensor is a small battery-powered piece that notices one thing — a door opening, movement, damp under a sink — and says so.
It only reports. Whether anything happens next is a routine you set up.
Key points
- A sensor notices one thing and reports it
- Anything that happens next is a routine you set up
What to remember
- A sensor tells. It never acts by itself.
- Sensors notice and report. Acting is another device’s job.
Try this
If you have a sensor, open its screen and read the battery figure. Note the month.
Practice: Say what a sensor is. Your first lesson is free, with no account or card; the rest are part of a Lantern plan. Interactive lessons require JavaScript.