The range of pore size characterization by mercury intrusion porosimetry has been extended from 120 micrometers to approx. 850 micrometers by investment in an ultramacropore tool. This enables quantitative analyses over an even wider range of pore sizes and offers the possibility of handling larger samples up to several centimeters in size and several grams of sample weight. The expansion of the pore size range will better serve e.g. the pharmaceutical and road construction sector where this type of porosity is of vital importance.