text: The pressure/step stability method  represents an alternative for the pressure scan method which permits a more accurate measurement of the pore sizes. It takes into account the different tortuosity and pore length of pores with the same diameter. The acquisition of a data point is only carried out after holding the pressure at a constant value for a user-defined time (see figure 2) and also only after the gas flow through the sample is stable, which is also defined by the user. This allows enough time for the gas flow to displace the wetting liquid in long and tortuous pores of the same diameter. Therefore the pressure step/stability method is the most recommended one for research and development applications.
  Additionally, the pressure step/stability measuring principle allows measuring the true First Bubble Point (FBP), in opposition to the pressure scan method, which only permits calculation the FBP at the selected flow rates.