Review of sensors for air quality monitoring

This report presents the results of quantitative studies the performance of tested low-cost sensors against reference measurement are collected. The information collected was an attempt to assess the following issues: • Agreement between sensor and reference measurements • Availability of raw data, transparency of data treatment and possibility of a-posteriori calibration • Capability to measure multiple pollutants • Affordability of sensor systems taking into consideration the number of provided sensors The information gathered in this report comes from research institutes having a LCS testing program in place, e.g. the California Board - Air Quality Sensor Performance Evaluation Center (AQ-SPEC), the European Union Joint Research Centre (EU JRC) and the United States Environmental Protection Agency (US EPA). Other information was drawn from peer-reviewed journals that tested different types of sensors in research studies. Finally, this information has been linked with scripts able to perform a statistical analysis in the form of an electronic report. This work represents an important review to classify all commercial sensors based on their agreement with reference systems.