ACE AF-33 Breathalyzer with fuel cell sensor + 25 Mouthpieces & Calibration Voucher
Hohe Präzision zum günstigen Preis, TU-Wien-Messgenauigkeit: 97,9 %

Manufacturer ACE Instruments
Weight 0.15 kg
Article number 100075
  • 97,9% accuracy according to TU Vienna
  • Electrochemical sensor for precise results
  • Number of previously conducted tests can be displayed
  • Intuitive application
  • Premium set with 25 additional mouthpieces and calibration voucher
Sensor type: Fuel cell technology Measurement accuracy: ± 0,005 % BAC
89,99 € / set

Prices incl. VAT and estimated delivery costs

Free shipping for:  Deutschland Deutschland
Lieferzeit: There are still larger quantities on stock.
There are still larger quantities on stock.


All measured values determined with this alcohol tester are always only a guide value and are not legally binding.

ACE Instruments recommends that you test the alcohol tester at least once a week, regardless of whether you have drunk alcohol or not. The device should also be calibrated regularly to maintain measurement accuracy.

Why is a calibration necessary?
Calibration is not mandatory, but the accuracy of the integrated sensor decreases continuously without calibration and the warranty expires if the calibration intervals are not observed. 

Any alcohol tester purchased from ACE Instruments can also be calibrated by ACE Instruments. Of course, we also calibrate instruments that have been purchased elsewhere, as long as these instruments are identical in construction to those sold by ACE Instruments. You can see the due date of the next calibration on the calibration sticker on your alcohol tester. If the sticker is missing, the calibration should be done 6 months after the purchase date: e.g. purchase date: 13.05. = next calibration on 13.11. and afterwards on 13.05. of the following year. You can send the instrument for calibration to the service address given under . There you will also find further information on calibration, the prices for the calibration service and the calibration return form.

Which factors influence the measurement accuracy?
- The more often the alcohol tester is used, the more the zero point shifts.
- At high alcohol concentrations, the zero point shifts more strongly.
- The sensitivity of the sensor also decreases in the case of devices that are used little or not at all.
- Amount of alcohol
- Period of alcohol consumption
- sex
- age
- weight
- body size
- drinking habit
- Health condition
- Vitality of the liver
- lung size
- dietary intake during alcohol consumption
- Influence of drugs

Further influencing factors

Some substances contained in tobacco such as methanol and acetaldehyde, in sweets substances such as isoprene or the 2-butanol often present in flavours and perfumes can influence the measurement result. Some other residual gases (caused by cigarette smoke, mint, etc.) in the mouth can also affect the sensor and thus the test result. If you have eaten or drunk something before a breath test, we recommend rinsing your mouth with water or waiting at least 15 minutes before the test to get a correct result.

Important notes on test procedure and self-assessment

After the last sip of alcohol, you should wait at least 15 minutes, as there may still be residual alcohol in the oral cavity that influences the measurement result. Smoking should also be avoided before a test, as cigarette smoke damages the sensor. A new mouthpiece should be used for each test - not only for hygienic reasons, but also because an already used mouthpiece can influence the next measurement result. There could be residual alcohol in the mouthpiece, which will influence the new test result if the same mouthpiece is used again (e.g. if a person is sober, this could indicate alcoholisation).

If the display shows "FLO" or "Flow", the breath sample delivered was not sufficient or was terminated too early. Blow your breath constantly for about 4 seconds and preferably as if you were whistling without sound. The breath test is finished as soon as you hear a double beep.

If the same person performs 2 tests in a row, they should wait at least 3 minutes between the two tests, as too short a waiting time can result in different readings being displayed. After a test, the air exhaled from the lungs is no longer enriched with the same alcohol content as in the previous test. Therefore, an immediate second test will show a lower reading.

Why the perceived alcoholisation and the measurement result often doesn`t or cannot not coincide
In an alcohol test, there are many different factors that influence the level of the measured value. In addition to sex, age, height and weight, these include the percentage of body fat and the percentage of body fluid. 

In addition, the general physical and mental condition as well as the respective daily condition must also be taken into account. In addition, the type of meals before the test (type of content and level of stomach) and the intake of medication can influence the measured value. 

Other influencing factors naturally include the type of drink (percentage of alcohol content in the drink as well as its carbonic acid and sugar content), drinking speed and the individual length of time dependent on the test person with regard to alcohol build-up and breakdown in the body.

Some people quickly have an increased alcohol content in their blood, others take longer to detect alcoholisation. About 40-50% of the alcohol consumed is in the body within 15 minutes, after 30 minutes it is 65% and after 70 minutes at the latest the previously consumed alcohol is 100% absorbed in the body. However, it should also be noted that some people - partly genetically determined - quickly reduce the alcohol content in the blood again, whereas others still have an increased alcohol content in the blood even after a longer period.

The ACE AF-33 - A Precise Breathalyzer with a Compact Design!

ACE has developed a class model that divides alcohol testing devices according to their accuracy.
Because of its electrochemical sensor, we were able to classify the ACE AF-33 into the upper class, ie into class 1, similar to devices with police-grade accuracy.
The heart of the ACE AF-33 breathalyter is an electrochemical M-sensor (medium, average long-term stability and life, lower deviations after one year compared to smaller sensors).
The measuring accuracy corresponds to a tolerance of ±0.05‰
Likewise, a flow sensor is installed for the determination of the applicant's breathing volume.
This means that the ACE AF-33's accuracy can be compared to professional police equipment.
The operation could not get any easier! Switch on, switch off, display the number of previously completed measurements, everything with only two buttons.
The control knob is operated by right-handed people with the thumb and by left-handed with the index finger.
After conducting the measurement, the ACE AF-33 will automatically turn off.

The ACE AF-33 Sets New Trends!

The surface of this device is smooth, but still easy to grip. Due to its modern and timeless design it offers a successful blend of style and utility.
On the outside, the AF-33 is reduced to the minimum, represented by its elegant and straightforward appearance and its intuitive operation for less experienced users.
Because of its low weight and handy size it fits into any shirt and jacket pocket and is therefore ideal for travelling - no matter where you go, the AF-33 is a reliable and discreet companion.
The backlit LED display is easy to read in all light conditions.
The measurement results are displayed in permille (3 digits), flow, readiness and battery alarm are also displayed.
The target groups in a nutshell
- Individual applicants
- Companies, institutions, organizations and associations in any form
- Schools (from middle schools to colleges and driving schools)
- Social and auxiliary services (addiction counseling centers, humanitarian institutions)
- Clubs, discos, bars, etc..

Precision According to a Breathalyzer Study Conducted by TU Vienna in Oktober 2015

5 measuring reference points (0.00, 0.10, 0.25, 0.40 and 0.60 permille) were tested in the laboratory using 5 identical ACE AF-33 breathalyzers and 10 repetitions. The manufacturer was not present during the test.
Overall, the device type ACE AF33 was thus tested 250 times in the laboratory of the Institute of Analytical Chemistry of the Technical University Vienna, headed by Univ. Professor Dr. Erwin Rosenberg.
For details see complete study, provided by ACE GmbH Germany.

Included in the set

ACE AF-33 Breathalyzer

Delivery time:
Free shipping for Deutschland Deutschland



89,99 € / piece

Prices incl. VAT and estimated delivery costs

Calibration voucher for breathalyzers with fuel-cell sensor

Delivery time:



40 € / piece

Prices incl. VAT and estimated delivery costs

25 Original ACE® Mouthpieces for ACE Neo, ACE AF-33, ACE DA-5000, ACE DA-7100 and ACE Wave

Delivery time:
Manufacturer number ACE Mundstücke (100074)



9 € / pack

Prices incl. VAT and estimated delivery costs

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