Dräger is a term for those instruments.

After holding the device in his hands and some self-tests have done, I can find that such a device, especially in the price range, for me does not make much sense private. Unless I'd go to France: Quote from "France-Info" of the French Embassy. -
"Since July 2012 Any vehicle owner is stopped in France to carry a breathalyser test. Based on the recommendations of the Conseil national de la sécurité routière and the decision of Interior Minister Manuel Valls to abolish the mandatory carrying of a breathalyser test, was the fine penalty, which on March 1 2013 to enter into force, abolished by decree of 28 February-2013.
The reason: The action brake self-regulation of the driver, as it would only matter in the controls and penalties of fines, to consider whether the driver execute an unused and unexpired alcohol test with it. In no other country has such obligations or penalties.
The Interior Ministry points out that combating alcohol continues to constitute a priority objective in the field of traffic safety at the wheel. In this sense, the law enforcement officers who have undergone an alcohol test in the past year more than ten million road users.
It is also recommended to undergo before boarding a self-control. The normalized in France alcohol tests meet high quality standards and offer the motor vehicle owners the best ways to ensure that they are still fit to drive. "

- The Dräger Alcotest® 3000 meets the requirements.

My times in which I am / ignorance crashed really in youthful exuberance are already over several decades and my current drinking behavior is moderate and determined by enjoyment. So I drink to a good meal in a restaurant like a glass of wine or a delicious beer. The device will confirm me what already give various BAC Calculator by entering age, height, weight and gender, after a glass of wine or a large beer for a period of more than one hour is obtained for me a value of max. 0.1 per thousand, when the 15 minute waiting period after the last sip is respected.
However, I would recommend to anyone accessing a Alcotestgerät once advised to carry out a series of measurements shortly after the consumption of alcohol in short time intervals. Immediately after the last sip of the values ​​are almost frightening, but they only show the still present in the saliva and oral mucosa remains, after the compulsory even in police controls of 15 minutes results in a usable measurement of breath alcohol.
Ever Breath Alcohol; now included as well as all applicable laws, the sanction exceeding certain alcohol limits, respectively maximum values ​​for AAK (breath) and the BAK (BAC), the former is measured in mg / l, the latter. in parts per thousand
For example, writes the waterway before order:
§3 (4) Any person who has 0.25 mg / l or more alcohol in the breath or blood alcohol 0.5 or more alcohol in the blood or a quantity of alcohol in the body that leads to such a breath or blood alcohol concentration, a vehicle must not lead do not exercise or as a member of a ship's crew other bridge, deck or machinery services. This applies to driving with a personal watercraft or a kite and sailing surfboard accordingly.

In this respect, I am surprised that this Dräger equipment and other (including the ACE Breathalyser AF-33) See their readings in parts per thousand, the devices expected to internally their measurement of mg / l per thousand to. A method which is not allowed in the form of court because the two values ​​do not correspond directly under all circumstances. Who should research on the internet about once interested.

The device itself is very easy to use, as you would expect from this renowned manufacturer well made and comes with a carrying bag that can also accommodate some mouthpieces. Especially small and handy carrying bag is not, although it even has a belt loop. There are other devices that fit easily into a jacket pocket.
During start up, short of the date of the next calibration will be displayed. Ever should be the follow-up costs not forget for a proper use of an annual fee-calibration is necessary and really you should use a new, sterile mouthpiece also with each measurement for hygiene and for the sake of accuracy. These plastic tubes (for B.Amazon ASIN:. B0058NR7FU) suggest around 40 euros per hundred to book. For the purely private use they hold fortunately from several washes in the dishwasher.

Is promised:
"Measuring Just like a police unit
In this quality put policemen in controls world: The Alcotest 3000 uses a highly sensitive electrochemical sensor that measures specifically alcohol. Even if about cigarette smoke is in the air, this sensor detects the precise alcohol level - even at the minimum concentration of alcohol. "
With Dräger, you can read what equipment versions are suitable and approved for that use, the Polzeigeräte are priced once again well above the Dräger 3000th
In general, it is worthwhile to read the notes and explanations in "Draeger com / sites / de".

Conclusion: For the purely private use, power does indeed apply good but price / performance to the benefits of all proportion. There's another, more favorable equipment with which you can check its values ​​if it is considered as necessary. In the workplaces, in sports and in restaurants as a service for guests she sees a different story.