ELI5: Explain Like I'm 5

Counterfeit detector

A counterfeit detector is a special machine that helps to identify fake money. Have you ever heard your parents say “that’s not real money” or “this bill looks fake”? Well, that’s where the counterfeit detector comes in handy!

The detector has special sensors that can tell if something is different or unusual about the money. It can check for many things like the size, color, texture, and security features of the bill. Important details on real money are things like special watermarks, special ink that changes colors, and security strips that glow under certain lights.

If the machine detects something that is not supposed to be on the bill, it will alert the person using it that the money might be fake. This helps people avoid taking fake money by accident and can also help catch people who try to use fake money on purpose.

So, basically, a counterfeit detector is like a superhero that saves people from getting tricked by bad guys who make fake money.
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