👉 A device capable of registering a specific substance or physical phenomenon, and that optionally sounds an alarm or triggers a warning.
Alright class, settle down, let’s take a look, At the word “detector,” a clever book! The dictionary tells us, clear and bright, It's a tool that sees with all its might. "A device capable," it starts to say, Of noticing something along the way. “A specific substance,” like smoke or gas, Or maybe heat – let’s look upon this class! It can detect things, big and small you see, Like a change in pressure, for you and me. And listen close now, don't be slow, "An alarm or warning," it will bestow! So a detector signals with a beep or chime, Alerting us to changes, marking time. Think of smoke detectors, red and bold, Or Geiger counters, stories told! In short class, a detector finds its way, To tell you something's happening today! Do you have any questions for me?