Porous Materials is one of the leading designers and manufacturers of custom scientific instruments for characterization of porosity, pore diameter, pore volume, pore surface area, liquid permeability, gas permeability, density and integrity testing. PMI also provides consulting services to seek out solutions for characterization of porosity and analysis of porosity. The testing services division of PMI offers contract-testing services for a variety of tests. Dr. Krishna Gupta founded Porous Materials in 1978 for the development and manufacturing of sophisticated and fully automated porosimeters for characterization of pore volume of porous materials. Headquartered in Ithaca, N.Y., Porous Materials is privately owned and employs nearly 30 people.