The Milton Roy Spectronic 1001 plus is a digital UV-Visible Spectrophotometer with a wavelength range of 190-950nm. It offers double beam stability with single beam energy. It performs real-time repetitive scanning between start and stop wavelengths you select. It is also pre-programmed with test formulas (endpoint, kinetics, multiple wavelengths etc.). It stores up to 30 customized tests. Wavelength accuracy: below 1.0nm. Spectral slitwidth: 2nm. Has RS-232 for connecting to a computer. Built-in printer as well.