2026-06-08T03:45:56Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/1035352025-03-18T15:05:53Zcom_20.500.14352_14col_20.500.14352_15

00925njm 22002777a 4500 dc Muñoz Poblete, Carlos Omar author Huircan Quilaqueo, Juan Ignacio author Jaramillo Montoya, Francisco author Boso Gaspar, Àlex author 2023-08-03 In order to ascertain the spatial and temporal changes in the air quality in Temuco City, Chile, we created and installed a network of inexpensive sensors to detect PM2.5 particulate matter. The 21 measurement points deployed were based on a low-cost Sensiron SPS30 sensor, complemented with temperature and humidity sensors, an Esp32 microcontroller card with LoRa and WiFi wireless communication interface, and a solar charging unit. The units were calibrated using an airtight combustion chamber with a Grimm 11-E as a reference unit. The calibration procedure fits the parameters of a calibration model to map the raw low-cost particle-material measurements into reliable calibrated values. The measurements showed that the concentrations of fine particulate material recorded in Temuco present a high temporal and spatial variability. In critical contamination episodes, pollution reaches values as high as 354 µg/m3, and at the same time, it reaches 50 µg/m3 in other parts of the city. The contamination episodes show a similar trend around the city, and the peaks are in the time interval from 07:00 PM to 1:00 AM. In the winter, this time of day coincides with when families are usually home and there are low temperatures outside Muñoz, C.; Huircan, J.; Jaramillo, F.; Boso, Á. Calibration of Sensor Network for Outdoor Measurement of PM2.5 on High Wood-Heating Smoke in Temuco City. Processes 2023, 11, 2338. https://doi.org/10.3390/ pr1108233 10.3390/pr11082338 https://hdl.handle.net/20.500.14352/103535 2227-9717 https://doi.org/10.3390/pr11082338 Calibration of Sensor Network for Outdoor Measurement of PM2.5 on High Wood-Heating Smoke in Temuco City