The PCE-ALC 30 alcohol tester is a compact keychain breathalyser designed to be carried easily and used quickly whenever an indicative check of alcohol content in breath is required. Its lightweight and manageable design makes it suitable for personal use, preventive checks before driving, occasional checks after consuming alcoholic drinks and situations where an immediate, simple and portable instrument is useful.

The product uses a fuel cell sensor, a technology that provides excellent accuracy and repeatability compared with simpler detection systems. This makes the PCE-ALC 30 particularly interesting for users who want a compact but technically reliable device for quickly checking alcohol levels. The result is shown on an OLED display with 3 decimal places, allowing a clear and detailed reading of the measured value.

The measuring range is available in several units and reaches 2.00 mg/L, 0.40 % BAC, 4.00 g/L and 440 mg/100 mL. Resolution is 0.001 % BAC and stated accuracy is ±0.010 % BAC at 0.050 % BAC. These values show the instrument’s ability to provide a fine numerical reading that is easy to interpret. The possibility of displaying and selecting different units makes the alcohol tester flexible and suitable for different reading habits or usage requirements.

The menu allows important functions to be managed, including calibration, unit selection, alarm threshold, operating mode and menu exit. The UNIT function allows selection between %BAC, ‰BAC, g/L, mg/L and mg/100 mL. The ALM function allows the alarm threshold to be changed by adjusting the value, while the MODE function allows selection between STANDARD mode for normal operation, ECO mode for battery saving and DEMO mode for demonstration only. These settings make the instrument more adaptable to user needs.

Operation is simple. After inserting the 1.5 V AAA battery and the mouthpiece, the user holds the power button until the device starts. The instrument emits an acoustic signal, switches on the display, activates the indicator lights in sequence and shows the warm-up countdown. At the end of warm-up, the user is prompted to blow. The user should blow gently until the acoustic signal is heard; the result is then displayed within a few seconds. If the value is below the preset threshold, the light is green; if it is above the threshold, the light turns red and an acoustic alarm is emitted.

The warm-up time is less than 5 seconds, making the PCE-ALC 30 highly practical for quick checks. Automatic switch-off occurs after 30 seconds in test mode and after 600 seconds in menu mode, reducing battery consumption when the instrument is not in use. The low voltage indication helps the user understand when the battery needs to be replaced, preventing interrupted measurements or operation with insufficient power.

For a more reliable measurement, it is recommended to perform the test at least 15 minutes after drinking. This waiting time is important because alcohol residues still present in the mouth could influence the result. The mouthpiece must always be used during the test, as the measurement may not be accurate without it. The breath sample must enter the instrument correctly and the sample inlet must not be blocked, otherwise the sample may remain inside the device and affect subsequent tests.

The manual recommends recalibrating the tester every 6 months to maintain sensor accuracy. This is a key technical point because alcohol testers based on sensors must be maintained correctly to preserve accuracy and repeatability over time. Users should therefore consider periodic calibration as an essential part of instrument management, especially if the product is used frequently or in contexts where greater reliability of the result is required.

For correct maintenance, the surface should not be cleaned with ethanol; a soft damp cloth and neutral detergent are recommended instead. It is also important to prevent smoke from entering the mouthpiece and the tester, as this could damage the sensor. The instrument should be protected from falls, strong impacts, dirt and unsuitable environmental conditions. The stated operating conditions are temperature from -10 °C to 50 °C and humidity up to 95%.

In practical use, the PCE-ALC 30 can be used by anyone wishing to check themselves after dinner, a party, an event, a business trip or any situation where alcohol has been consumed. It is also useful for professionals who drive frequently, travelling technicians, fleet operators, drivers, logistics personnel and users who want to adopt more cautious behaviour before driving. The keychain format makes it easy to keep the device always available, reducing the risk of leaving it at home or in the office.

The alcohol tester should not be considered a substitute for official checks carried out by the competent authorities and does not remove the user’s personal responsibility. The measured value should be interpreted as a preventive and awareness-supporting indication, not as an automatic authorisation to drive. In case of doubt, the safest choice is not to drive and to wait an appropriate time.

The PCE-ALC 30 is not a dimensional measuring instrument and is not used to check heights, transmission clearances, form errors or geometry. Its specific function is to measure alcohol content in breath using a fuel cell sensor. However, in a safety context, the measured value can help prevent risky behaviour, increase user awareness and support more responsible decisions before driving or performing activities requiring attention.

With dimensions of 66 x 47 x 19 mm and a weight of only 35 g, the PCE-ALC 30 is an extremely compact solution for users looking for a portable, fast and easy-to-use alcohol tester. The combination of fuel cell sensor, OLED display, 3-decimal measurement, adjustable alarm threshold, selectable units, visual and acoustic signal, ECO mode and AAA battery operation makes the product suitable for quick personal checks and everyday preventive use.