Figures and show H2O diffusion on MOF-303 measured with 2 different CSFR instruments. Consistent with previously reported data on this sample, micropore diffusion controls and slows the diffusion closer to the step in the isotherm. Figure shows that when N2 is not present, the mechanism that best describes CO2 diffusion on CALF-20 is micropore diffusion. Because this behavior was unexpected, the measurement was repeated with sine waves to verify it, and the agreement seen in Figure provides further validation of the technique. A more detailed discussion of the impacts of N2 is given later in this work.