Banknote detector or currency detector. These devices are used to verify the authenticity of banknotes and other documents like credit cards and passports.
It uses ultraviolet (UV) light to reveal security features that are not visible to the naked eye.
Authentic banknotes often display a clear watermark under UV light, which counterfeit notes lack.
These devices are commonly used in various settings such as shops, restaurants, and hotels to prevent financial loss from fake currency.
They are designed to be easy to operate, often with a single switch to control the light.