GENIE Quicktester Plus Chemical analysis | with UV lamp | for €, $, £, CHF The compact GENIE Quicktester Plus is the ideal companion in retail, catering, at weekly markets or in private use, to ensure that you do not receive counterfeit banknotes. The banknote testing pen uses the special chemical properties of the ink to instantly detect the authenticity of euro, US dollar, British pound and Swiss franc banknotes. In addition to the chemical application, the Quicktester Plus also has a built-in UV lamp that fluoresces when used on genuine banknotes.