The mass spectometer I use is the Pfeiffer Vacuum with both Faraday and SEM detector types. (How do I choose the acurrate SEM voltage?). I use it is as an outlet analysis system in Solid Oxide Electrolyser Cells, for co-electrolysis processes and my aim is to measure CO2, H2, H2O and CO, which will be in the process over wide concentration range. Thank you!