Porous Materials Inc. (PMI) is a U.S.-based manufacturer specializing in porosity, permeability, and pressure measurement instrumentation. The company designs and produces systems used to characterize porous materials and perform accurate pressure control, calibration, and leak testing. PMI equipment supports research, quality assurance, and production operations across a wide range of industries. Porous Materials Inc. (PMI) develops precision instruments for material characterization and pressure-based testing. The company’s product offerings include porosimeters, permeameters, automated pressure systems, calibration equipment, and leak and burst testing solutions. PMI focuses on accuracy, automation, and repeatability to support laboratory and industrial testing requirements.