... : Littow type, Single beam, Grating system 1200l/mmSpectral Slitwidth: 4nmWavelength Range:325-1000 nm Accuracy:±1 nm Stray Light:≤0.3 ... Output: Analog RS-232CPhotometric Performance Photometric Mode: Transmittance, Absorbance,ConcentrationPhotometric Range:0-125.0%T,-0.0970-2.700A, 0-1999CAccuracy ... :440 ×370×200(mm)Net weight :9.5kgGross weight:17kg range of Spectrophotometer