Advanced Chemical Process Control Chemical Sensors and Automatic

September 2004 Advanced Chemical Process Control Chemical Sensors and Automatic Analysis: Part Two (This article is a continuation ofan article that appeared in the PCMI Journal in June 2004.) INTERMEDIATE DEVICES & ADVANCED SYSTEMS The intermediate devices are Spectrophotometers and Ampere-hour. Advanced systems include Electro-Analytical (Voltametric); Liquid Chromatograph; Ion Chromatograph; Gas Chromatograph; Atomic Adsorption (AA); Combination (Nuclear), Miscellaneous; and ChemFET/ChemResistors. Happy Holden, Westwood Associates