Normally permeability analysis are done with different instruments,each with a specific sensor (O2 or WVTR or CO2). Our instruments can equipped with 1-2 or 3 sensors following customer needs. Multiperm line can have O2-WVTR or O2-CO2 or WVTR-CO2 sensors. Totalperm instrument has O2-WVTR and CO2 sensors.