Breathalyzers: Precision and Safety in Alcohol Measurement
A breathalyzer is a high-precision device used to measure the concentration of ethanol in the body, known as Blood Alcohol Content (BAC). This measurement is performed quickly and non-invasively by analyzing the breath exhaled (Breath Alcohol Content – BrAC) during a blow.

The detection of alcohol in the body is carried out using two main analytical methods: electrochemical sensor technology or infrared absorption, both widely recognized for their reliability and accuracy.

The scientific basis of breathalyzers lies in the physiological relationship between the alcohol concentration in alveolar air and the alcohol level in the blood. While this relationship may vary across countries due to physiological differences in the population, it allows for an effective conversion. In Portugal, it is established that 1 mg of alcohol per liter of exhaled air (BrAC) corresponds to 2.3 g of alcohol per liter of blood (BAC):

1 mg/L (BrAC) = 2.3 g/L (BAC)

Although breathalyzers are primarily used for monitoring alcohol levels in road traffic enforcement, their application has been expanding to other sectors. A growing number of companies are adopting this technology to enhance workplace safety, ensuring that employees are not under the influence of alcohol while performing their professional activities.

By implementing breathalyzers, organizations promote safety, responsibility, and risk prevention, making these devices essential allies in protecting lives and ensuring compliance with regulations.