I am trying to integrate MQ135 and MG811 sensors for detecting CO2. But their sensitivity is only till 10000ppm that is 1% of CO2 . But my requirement is more than 30% of CO2 that is 300,000ppm.
I am struck and not able to understand how to get the desired ppm.
Is it possible to use multiple sensors in series to get high ppm else any other sensor with high ppm or any other method.
Kindly help out with the possible solution.