The ACE AF-33 alcohol tester impresses with its high measurement accuracy and its modern, timeless design. It features a smooth yet easy-to-grip surface. Completely new - an alcohol tester with integrated lighting for the mouthpiece. Tested by TU Vienna! The measurement accuracy is based on an alcohol tester accuracy study conducted by the Technical University of Vienna in October 2015. In this study, five measurement reference points (0.00, 0.10, 0.25, 0.40, and 0.60 per mille) were tested with five identical measuring devices, each undergoing ten repetitions in the laboratory. Overall, this device type was tested 250 times in the laboratory of the Institute of Analytical Chemistry at the Technical University of Vienna under the supervision of Univ. Professor Dr. Erwin Rosenberg. You can find the details of the study in the documents and downloads.