Counterfeit detectors with special element "M" check

Special element "M" check

— verification of the special element "M" — a symbol that is visible in infrared light. To detect it, the bill is alternately irradiated with IR light with different wavelengths: at one wavelength, the special element “M” is clearly visible, at another, it is indistinct, as a result, this element “blinks” on the detector's display, which is easy to observe.