Low-cost PM2.5 sensors are increasingly used for long-term air quality monitoring because they are affordable, easy to operate, and capable of delivering continuous, high-resolution data without the need for on-site maintenance. Their main limitation, however, is reduced accuracy compared to regulatory instruments, which, in turn, raises questions about their stability and the frequency of calibration required. A common concern is whether these sensors experience drift – a gradual change in response over time that could compromise data reliability. We decided to investigate to see if PM2.5 drift is something you need to worry about with your AirGradient monitors.
This is a companion discussion topic for the original entry at https://www.airgradient.com/blog/do-our-pm2.5-sensors-drift/