The group's principal activities are to design, manufacture, market and service sample preparation, detection, measurement and monitoring instruments used to analyze chemical compounds. the products of the group include gas chromatography instruments and systems, total organic carbon analyzer systems, ion analysis systems, sample preparation products and systems and filtometers. the instruments are used for specialized applications in the analytical instrument markets. the group sells its products domestically to end users through a direct sales channel, manufacturers' representatives, distributors and resellers. the products are sold internationally through independent manufacturers' representatives and distributors.