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. This alcohol tester also includes integrated lighting for the mouthpiece. Tested by TU Vienna. Measurement accuracy according to the 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 ‰) were tested with five identical measuring devices and ten repetitions each (excluding the manufacturer) in the laboratory. Overall, the device type was tested 250 times in the laboratory of the Institute of Analytical Chemistry at the Technical University of Vienna, under the direction of Univ. Professor Dr. Erwin Rosenberg. You can read the details of the study under "Documents & Downloads.".