... 50 groups of data *Auto setting wavelength Specifications Model:SE-5100B Optical System: Single beam, Grating 1200 lines ... Weight: 15kg SE5100B Single Beam UV VIS Spectrophotometer, Automatical WL, Auto setting wavelength Spectrometers, spectrophotometer, spectrometersFeatures 1,Large ... on/off individually to extend lifetime.6, Automatical WL. calibration and dark current getting. 7,Optional software ...