Visible Spectrophotometer NVS-100 is a compact and ergonomically designed analytical instrument for optical measurements such as transmittance or reflectance of transparent chemical solutions or opaque solids. It is equipped with tungsten lamp as a source of light and silicon photodiode as the detector. It runs in visible range of the electromagnetic light spectrum with single beamed, blazed holographic grating optical system for optimized selection of wavelength across the working range for precise analysis.