The innovative optical layout and state of art mono-chromator with high grade blazed holographic grating ensure accuracy. Its integrated Design assures long term stability and durability. The precisely aligned detector and quality deuterium and halogen lamps enhance the precision across the uv/vis spectrum starting from 190nm and into the near-infrared 1100nm. Online software upgrade capability via internet(for stand-alone models). Full a4 print-out of graphs and tables of results with popular inexpensive printers such as hp or epson deskjet. Real-time clock for date and time stamping of results. Large lcd display (320*240 dots matrix). Specifications: Model Uv-1600 (new) Optical system Double beam (1200 lines/mm grating) Wavelength range 190-1100nm Band width 0.5/ 1.0/ 2.0/ 4.0 nm optional Wavelength accuracy ±0.3nm Wavelength repeatability 0.2nm Photometric accuracy ±0.3%t Photometric repeatability 0.2%t Photometric display range -0.3-3a, 0-200%t, 0-9999c Stability ± 0.001a/h @ 500nm Baseline flatness ±0.001a Noise ±0.001a Stray light ≤0.05%t @220nm, 360nm Data output port Usb Printer port Parallel port Display Lcd (320*240 dots ) Lamps Deuterium lamp & tungsten halogen lamp Detector Silicon photodiode Software Uv pc software Packing size & weight 625*430*206mm & 30kg 625*430*206mm & 30kg