Cecil CE7400 Aquarius Double Beam Spectrophotometer, 190-1100nm, 2nm band width, fully symmetrical optics, automatic self-test and calibration, large backlit LCD graphical display, autozero, 30 methods may be stored, bi-directional RS232 interface, on board software includes method storage, curve fitting, scanning, 1st-4th derivatives, buffer memory, overlay, ratio, sequential scan, scan storage and time course plot.