Air quality dataset from an indoor airport travelers transit area

The experimental dataset (organized in a semicolon-separated text format) is composed by air quality records collected over a 1-year period (October 2022-October 2023) in an indoor travelers' transit area in the Brindisi airport, Italy. In detail, the dataset consists of three CSV files (ranging from 7M records to 11M records) resulting from the on-field data collection performed by three prototypical Internet of Things (IoT) sensing nodes, designed and implemented at the IoTLab of the University of Parma, Italy, featuring a Raspberry Pi 4 (as processing unit) which three low-cost commercial sensors (namely: Adafruit MiCS5524, Sensirion SCD30, Sensirion SPS30) are connected to. The sensors sample the air in the monitored static indoor environment every 2 s. Each collected record composing the experimental dataset contains (i) the identifier of the IoT node that sampled the air parameters; (ii) the presence of gases (as a unified value concentration); (iii) the concentration of carbon dioxide (CO₂) in the travelers' transit area, together with air temperature and humidity; and (iv) the concentration of particulate matter (PM) in the indoor monitored environment - in terms of particles' mass concentration (µg/m³), number of particles (#/cm³), and typical particle size (µm) - for particles with a diameter up to 0.5 µm (PM_0.5), 1 µm (PM₁), 2.5 µm (PM_2.5), 4 µm (PM₄), and 10 µm (PM₁₀). Therefore, on the basis of the monitored air parameters in the indoor travelers' transit area, the experimental dataset might be expedient for further analyses - e.g., for calculating Air Quality Indexes (AQIs) taking into account the collected information - and for comparison with information sampled in different contexts and scenarios - examples could be indoor domestic environments, as well as outdoor monitoring in smart cities or public transports.