Hitachi's U-3900 Double-Beam Single-Monochromator System and the U-3900H Double-Beam Double-Monochromator System are high-performance, comprehensive, research-grade solutions for a variety of resolution concave diffraction grating.

Features and Specifications
• Band pass width selectable in discrete steps of 0.1, 0.5, 1, 2, 4, and 5 nm • Stray light < 0.015 %T, NaI 220nm, NaNO2 340nm
• Wavelength accuracy of ± 0.1 nm and reproducibility of ± 0.05 nm
• Photometric modes include absorbance, % T, % R, E(S), E(R)
• Photometric range -3,8 to 3,8 A (effective range) and 0 -300 % T; accuracy of ± 0.002 A (0 to 0.5A, ±0.003 A (0.5 to 1 A), ±0.006 A (1,0 to 2,0 A) and ± 0.3 % T; reproducibility of ± 0.001A (0 to 0.5 A, ± 0.0015 A (0.5 to 1A), ± 0.003 A (1 to 2A) and ± 0.1 % T
• Baseline flatness of ± 0.0003 A and stability of 0.0002 A/hr at 500 nm
• Selectable scan speeds of 1,5, 3, 15, 30, 60, 120, 300, 600, 1200, 1800 and 2400nm/min • Light sources are kinematically mounted with adjustment free deuterium lamp for UV range and 50W tungsten iodide for visible range with lamp switching optionally set from 325 to 370 nm
• R928 PMT detector
• Sample compartment dimensions 120 W x 300 D x 140 H mm with 100 mm distance between sample and reference beams
• USB communications interface
• UV Solutions 3.0 software and USB communications cable
• Also available with double-grating monochromator as Model U-3900H