Have the Dräger Alcotest tested extensively and have to say that the device works very precisely. Even with several tests in succession, the measured value remains almost constant. Only the second decimal place usually varies somewhat. The operation is very simple, because the device has only one button. In addition, stickers are included which describe the exact process of the procedure and can be mounted behind the unit. The interesting thing, however, is actually time to test how does the personal alcohol level. Especially with the typical situations in which you drank a couple of beers and is not sure whether one because still I drive my car. It was also interesting to see that the breathalyser on vinegar reacts. Drinking one, completely sober, a sip of vinegar, so the instrument displays up to 0.08 per thousand. Likewise, it does not matter if you blow into fast or slow for the measurement. All gimmicks that remain a verwärt in general traffic control. The breathalyser must be calibrated additionally regularly (about 1 time per year), which costs an additional 45. However, the question is does it for an individual sense to purchase such an expensive device. Ultimately, everyone must decide for themselves. The fact is, it is very instructive to know their alcohol level, and its development, and just in a larger group, this unit is also really fun. All in all, a very high-tech instrument, which is very expensive, but also very reliable (as long as it is calibrated at regular intervals). From my side, I could not fault it and give full 5 stars.
