PolyScience, a division of Preston Industries, is one of the leading manufacturers and distributors of temperature control equipment in the world. It has received ISO 9001:2000 certification from the International Organization for Standardization. Founded in 1963, the company produces variety of industrial products, such as turbine pumps, computer numerical control lathes, printers, bioreactors, condensers, electron microscopes, lasers, portable chillers, vacuum systems, and lithographic, welding and die casting equipment. It additionally provides heat exchangers, water baths, pressure reducers, flask holders, concentric rings, tubing clamps, and refrigerated and heating circulators. The company offers design, engineering, technical support, testing, inspection and transportation services. It serves the laboratory, laser, pharmaceutical, plastic, chemical and medical industries. PolyScience is headquartered in Niles, Ill.