A professional breathalyzer with an electrochemical sensor for precise and rapid determination of alcohol concentration in exhaled air. Provides contactless measurement, high accuracy, and user-friendly operation.

FAQ on Operating a Mouthpiece-Free Professional Breathalyzer

Which type of sensor is installed?

The device is equipped with an electrochemical sensor (per the manual and manufacturer’s responses). Such sensors are selective to ethanol vapors and provide stable readings when operated correctly.

In which units does the device measure, and what exactly is shown?

The device measures alcohol concentration in exhaled air and displays it in g/L and in %BAC. The value in per mille is equivalent to g/L: 0.5 g/L = 0.5 ‰. Switching to mg/L is not provided.

How should the readings be correlated with legal thresholds?

Legal thresholds for drivers in the Russian Federation are set in mg/L of exhaled air, whereas the device shows g/L and %BAC. Direct comparison without conversion is incorrect; rely on the device’s color indication and use certified instruments for legally significant measurements.

At what value do the audible alarm and visual indication activate?

According to the seller’s manual, a warning with an audible signal triggers at approximately 0.2 g/L and above. Below this value, the indicator remains green; thereafter, yellow/red signals warn of exceedance.

What is the operating measurement range?

Typical range: 0.00–0.19 %BAC and 0.0–1.9 g/L. Outside this range, readings are not guaranteed.

Is calibration required, and how should it be performed?

Before first use and after prolonged storage, perform cleansing/calibration: power on the device, wait for the countdown from ~14 to 0, and power off. Repeat three times. Conduct measurements in a ventilated area, 15–20 minutes after food or beverages.

What interval should be maintained between measurements?

For accuracy, maintain at least 1 minute between measurements for different individuals. For repeated tests on the same person, pause 15–20 minutes.

Should one blow from a distance, or directly into the port?

Blowing directly into the port is permitted. For contactless operation, hold the inlet approximately 3–5 cm from the lips without obstructing air intake.

Why does the device indicate “intoxication” for a child?

Children have a smaller exhalation volume and different respiratory physiology, which can lead to false activations. Sweets, syrups, mouth rinses, and other alcohol-containing substances also influence results.

Why does the device show a value if no alcohol was consumed?

Residual alcohol vapors in the oral cavity and background from perfumes/antiseptics affect readings. Wait 15–20 minutes without food or drink, measure in clean air, and repeat the test.

What charging connector is used, and how long does charging take?

Micro-USB connector; a cable is usually included. From a 5V/1A source, a full charge takes about 20–30 minutes; use the charging indicator as a guide.

Which power adapter should be used for charging?

Use a standard 5V/1A adapter or a PC/laptop USB port. Do not use fast charging at 9V/12V or high-power adapters above 2A.

Does the device run on batteries or a built-in accumulator?

Power is supplied by a built-in accumulator. Recharging is performed via micro-USB.

What is the battery capacity, and how many cycles does a charge support?

The exact capacity in mAh may vary by batch. On a full charge, the device can perform approximately 300 measurements.

How many blow tests is the sensor designed for?

Sensor service life depends on operating conditions; some manuals indicate extended resource. No exact number of blow tests is regulated; focus on reading stability and timely calibration.

What does the “L” error at startup mean?

The code “L” (Low) indicates low charge or insufficient power. Fully charge the device and try starting it again.

Why does the device power off immediately after exhalation?

This is normal cycle completion: after the blow, the device records the result and may switch off. If the display turns off before the result is shown, check the charge level and repeat the measurement.

Why does the device signal at 0.02?

Triggering around 0.02 %BAC corresponds to ~0.2 g/L, which is near the warning threshold. A reaction to residual vapors or external alcohol sources is possible. Repeat the measurement after a pause in clean air.

What should be done if the device always shows 0.0 or, conversely, overestimated values?

Perform calibration (triple warm-up), check the charge level and measurement conditions. If the issue persists, complete a full discharge/charge cycle and repeat the tests.

Why does the charging indicator go off and the device fail to charge?

Check the cable and a 5V/1A adapter; try another port. The indicator may turn off after charging starts; monitor progress and try another power source.

Can the sound/beeping be disabled?

Disabling audible indication is not provided by the design.

The screen fogs during exhalation—is this normal?

Fogging is possible when the device is held too close to the mouth with warm exhalation. Keep a 3–5 cm distance or blow with a less humid airflow.

There is a “rattle” inside the housing. Is this a malfunction?

Minor sounds may be caused by elements of the air channel and the housing and usually do not affect operation. If in doubt, stop using the device and have it diagnosed.

What is the maximum value the device can display?

The built-in indication is designed for a range up to ~1.9 g/L (0.19 %BAC). Beyond this range, accuracy is not guaranteed; overload signaling is possible.

How should a measurement be performed correctly?

Hold the power button, wait for the countdown, and blow during the signal. Do not eat or drink for 15–20 minutes before the test; perform the measurement in a ventilated area.