All modules we use in our DIY kits [1] are factory calibrated and we use the same sensor modules in our commercial sensor that went through the RESET Air certif

All modules we use in our DIY kits [1] are factory calibrated and we use the same sensor modules in our commercial sensor that went through the RESET Air certification. So these sensors are very good. We compare them side by side and see no differences in accuracy. Another important thing is the PCB and enclosure design to ensure accurate air flow to the sensors and also prevent internal heat influencing the temperature reading. In the DIY Pro kit we use a similar design like our commercial monitor but as a fully open sourced version. So it's very accurate. [1] https://www.airgradient.com/open-airgradient/kits/ https://www.airgradient.com/open-airgradient/kits/