We tested the performance of the two sensors during our free time over the past two days. Based on our observations, after calibration, their performance was very similar. In daily use, the range of the SCD40 (SCO2-1) (2000 ppm) is more than sufficient, and it is very stable. It is difficult to reach higher carbon dioxide values.
Additionally, we added some text descriptions to the firmware of the SCO2-30, along with a value for exhaled carbon dioxide. We optimized the update cycle of the SCD30 to allow a maximum response time of 2 seconds, enabling its high-speed dynamic response.
Regarding carbon dioxide, we have gained some new insights: it serves as an interesting reference parameter for air freshness. When carbon dioxide levels rise, it indicates that air quality is deteriorating, which may become a contributing factor to the spread of influenza or other illnesses. In such cases, wearing a mask or ventilating the space becomes necessary.
For applications requiring a broader CO₂ measurement range (especially in plant environments), the SCO2-30 may be a suitable option.
Let's keep refining it and make it even more reliable and user-friendly! We look forward to sharing it soon as another exciting CO₂ sensor exploration project.
