Hi,
It seems you want to use multiple trace gas inputs into a stream.
You can try passing the trace gas inputs via the Simulink "pipe(MA)" block and use output from it as per the further requirements. As it is not given how your system is set up, I assume a basic combination of several trace gas sources is being passed through the pipe. To use the trace gas with the "pipe(MA)" block, you need to make changes in its block parameters (which you can open by double clicking on the "pipe(MA)" block) under the "Moisture and Trace Gas" option of the block parameter; there will be a parameter "moisture and trace gas source" change the corresponding value for this parameter to "Controlled". This will allow you to provide trace gas inputs to the pipe, which you can use as per further requirements.
Refer to the image given below as an example implementation:
For more information on moisture and trace gas, refer to the below documentation:
I hope this helps!
