supply of microprocessor based double beam uv visible spectrophotometer , micro processer based, double beam, uv, visible spectrophotometer specifications: wavelength range: 190 to 1, 100 nm, spectral bandwidth: 1 nm ( 190 to 1, 100 nm ) , wavelength display: 0.1 nm increments, wavelength setting: 0.1 nm increments ( 1 nm increments when setting scanning range ) , wavelength accuracy: ± 0.05 nm at d2 peak 656.1 nm, ± 0.3 nm for entire range, wavelength repeatability: ± 0.1 nm, wavelength slew rate: about 14, 500 nm / min, wavelength scanning speed: 3, 000 to 2 nm / min 29, 000nm / min when survey scanning, lamp interchange wavelength: automatic interchange linked to wavelength. the interchange wavelength can be set freely in the rate of 295 to 364 nm ( 0.1 nm increments ) . stray light: less than 0.02% at 220 nm ( nal ) less than 0.01% at 340 nm ( nano2 ) less than 0.5% at 198 nm ( kci ) , photometric system: double beam optics, photometric accuracy: ±0.002 abs at 0.5 abs, ±0.0025 abs at 1.0 abs, ±0.006 abs at 2.0 abs, ( measured using nist930d / nist1930 or equivalent ) photometric repeatability: less than ± 0.0001 abs at 0.5 abs, less than ± 0.0001 abs at 1 abs, less than ± 0.0005 abs at 2 abs, baseline stability: less than 0.0003 abs / hr ( 700nm, one hour after light source turned on ) baseline flatness: less than ± 0.0006 abs, ( 1, 100 to 190 nm, one hour after light source turned on ) , noise level: less than 0.00003 abs ( 700 nm ) , light source: 20-w halogen lamp and deuterium lamp built-in light source auto position adjustment, detector: silicon photodiode, power requirements: ac100, 120, 220, 230, 240 v, 50 / 60 hz, 140 va, display: 24-bit colour touch screen, supported languages: english comprehensive replacement guarantee: 2 years