721 Digital grating spectrophotometer

721 digital spectrophotometer is a practical, very strong, the test is accurate, easy to operate common analytical instruments, which are widely used in metallurgy, machinery, chemical, medical and health, clinical examination, biochemical, environmental protection, food, materials production, teaching and research in science and other fields, especially for these areas or laboratory sector of the various substances for quantitative and qualitative analysis. First, the instrument main technical indicators and specifications 1, wavelength range: 350-820nm 2, wavelength accuracy: ± 3nm 3, wavelength repeatability: <1nm 4, spectral bandwidth: 5nm 5, stray light: ≤1%; (T) (at 360nm Office) 6, transmittance measurement range: 0-100% (T) 7, absorbance measurement range: 0-1.999 (A) 8, the concentration of direct reading range: 0-20009, reading accuracy: Transmittance accuracy : ≤1.5 (T) absorbance accuracy: ≤ ± 0.004A (at 0.5A at) 10, Transmittance Repeatability: <0.5% (T) 11, source: 6V10W (long life tungsten halogen lamps) 12, dispersive elements: plane grating 1200 lines / mm 13, receiving elements: silicon photocell