C-AT118 Key Features. Detection Range: 0.00 ¨C 0.20%BAC (0.00 ¨C 1.00mg/L; 0.00 ¨C 2.00g/L) Preset Limit: Two Level Concentration (0.02%, 0.05%BAC) Sensor Semiconductor sensor Power: 2 AAA batteries ( >200 times)