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Real Double Beam UV Vis Spectrophotometer for Molecular Analysis Lab Instruments. Dual-Beam Optical System: UV-1900 dual-beam design ensures high accuracy and reliable measurements. Wide Wavelength Range: Covers 190 to 1100nm to meet diverse application requirements. Six Spectral Bandwidths: Offers 0.1, 0.2, 0.5, 1.0, 2.0, and 4.0nm options for stringent needs. Rich Measurement Methods: Includes wavelength scan, time scan, multi-wavelength, and DNA protein analysis. PC Control Capability: Enables accurate and flexible measurement via computer connection. Data Output Interface: Supports data output through printer with USB interface. Comprehensive Certifications: Certified with RoHS, ISO9001, and CE standards.