AP338 BREATHALYZER EASY RECALIBRATION with printer Professional breathalyzer with cell sensor, with printer and touch screen. The cell sensor is a porous disc with a thin layer of platinum. The alcohol that comes into contact with the surface of the cell is chemically broken down. For each alcohol molecule broken down, a given number of electrons is released. The number of electrons generated is proportional to the amount of alcohol. Auto recalibration: Easy replacement of the pre-calibrated module. Breathalyzer supplied with integrated printer, 25 mouthpieces, 1 large mouthpiece, 100-240V power cable, 50/60 Hz, transport bag, 4 rolls of paper, charger, USB cable, Manual in GB, IT. Dimensions: 208x78x37 mm Weight: 360 g