Biochrom Ltd. has announced the Libra S4 and S6 visible diode array spectrophotometers for use in industrial and teaching laboratories. The Libra S4 covers the 330- to 800-nm range and has a large high-visibility display for numerical results. It can be used with test tubes or conventional cells, and the cell holder is removable for cleaning or can be flushed in situ. The Libra S6 includes full graphics capability that directly displays scans, standard curves and kinetics assays. Both spectrophotometers include Grafico PC utility software for capturing, printing and storing data.