Time series of continuous atmospheric measurements of O2 and CO2 at the Cabauw in the Netherlands between September 2024 and March 2025. The measurements are ongoing and will be updated in the future. These measurements are at 207 m height, future updates will include also 2 other heights: 27 and 67 m (started in March 2025). The CO2 is reported in ppm units and was measured using a non-dispersive infrared (NDIR) CO2 analyser URAS. The O2 is reported as O2/N2 in per meg units and was measured using a dual lead fuel cell O2 analyser, Oxzilla from Sable Systems International Inc. We report hourly averages (with their standard deviation) of 2-minute measurements. An hour must have at least 9 measurements or the hourly average is not included. "NA" is used when there is no data. Gaps in the data are due to routine running of calibration cylinders, maintenance and removal of data with known technical issues. CO2 data are reported on the WMO NOAA X2019 calibration scale. O2 data are on the Scripps Institution of Oceanography (SIO) 2023 calibration scale.