CO2_monitoring_data

CO₂ monitoring networks with low-cost and medium-precision sensors (LCSs) have become an exploratory direction for CO₂ observation under complex emission conditions in cities. Yet the performance of such LCS after deployment in the field faces significant challenges due to environmental impacts and long-term drifts due to sensor degradation. We conducted 30 months of co-located observations using SenseAir K30, with a reference instrument (Picarro) to study the long-term performance of the LCSs under field conditions, which is essential for the correction and validation of mid-low cost CO₂ observation networks.The original data used in the research of low-cost CO2 monitoring sensors. The sensors are co-located with a Picarro analyzer from Jun 2022 to Dec 2024. The reference CO2 from Picarro is in the data file 'Picarro_20220620_20241220.xlsx'. The environmental sensitivity corrected results are provided in the file ‘K30_drift_20220601-20241201.xlsx’, without the calibration of long-term drift. The CO2 monitoring concentration is in the file 'K30_1pCalib_20220601-20241201.xlsx’, with environmental correction and drift calibration.