Canadian Currency Banknote Counters
The basic Canadian banknote counter will provide a total count of the notes in the supply tray. There are more advanced counters that have the ability to detect different bill types to give a total currency value of mixed banknotes, including those that are upside down. Some banknote counters can also identify counterfeit bills by using one of two methods, either magnetically and/or using a blacklight. The blacklight (UV) based detectors exploit the fact that in many countries, real banknotes have fluorescent symbols on them that will only show under a black light. Also, the paper used for printing money does not contain any of the brightening agents which make commercially available papers fluoresce under black light. Both features make counterfeit notes both easier to detect and more difficult to successfully create.
A stack of bills are placed in a compartment of the machine, and then one bill at a time is mechanically pulled through the machine. By counting the number of times a beam of light is interrupted, the machine can count the bills. By comparing an image of each bill to pattern recognition criteria, the machine can figure out how much genuine money was placed in the compartment.