The Biochrom Libra S6 visible diode array spectrophotometer has been designed to meet the routine spectroscopy needs of customers requiring a compact, light weight instrument that is easy to use and which includes far more features than similar priced products. It measures Absorbance, % Transmission, Absorbance ratio, Concentration and Kinetics. A large backlit graphical display enables wavelength scans, kinetic assays (including slope calculation) and standard curves to be viewed. The instrument is delivered with Grafico PC utility software package (32-bit PC compatible) and a serial lead, to facilitate transfer of results to computer. Alternatively, graphics may be printed to either the S1000P or the industry standard Seiko DPU-414 printer plus kinetics data may be output to a chart recorder. The Libra S6 accepts standard 10mm pathlength glass or disposable cuvettes. A test tube adapter set is available for 10, 12 and 16mm (COD measurements can be made using standard 16mm tubes). The cell holder may be removed for cleaning or decontamination. The Biochrom Libra S6H is available with a factory fitted electrically heated cell holder for thermostatted measurements at 37°C.