You can find two parts of the Active Carbon Kiln project here separately: the conveyor scale and the exhaust gas analyzer. I made these two at first, then combined other components and parts with these.
As you might know from the whole project, The conveyor scale is a belt conveyor which transfers and weights hot active carbon powder. The gas analyzer utilizes 7 MQ sensors to measure CO and hydro-carbon gases from inside the kiln and thus predict the purity of the produced active carbon(the actual purity is determined in a laboratory).

Code is available on Github: https://github.com/soroushtou/Active-Carbon-Kiln