SPECORD 250 PLUS UV/Vis spectrophotometer

SPECORD PLUS series UV-VIS spectrophotometers DOUBLE-BEAM SPECTROPHOTOMETERS

Real double-beam spectrophotometer with double monochromator, dual thermally stabilized CСD detector and control via PC.

Main advantages:

• monochromator with concave holographic grating and reduced stray light;
• minimal quantity of moving parts in the optical system ensures reproducibility, vastly improved signal-to-noise ratio and high concentration of radiation energy;
• aspheric optics for optimized, precise spectral imaging;
• pre-adjusted and voltage stabilized radiation sources;
• Integrated holmium filter for automatic wavelength calibration, for precision and reproducibility of wavelength setting;
• maximum lamp service life;
• double-beam design of the optical system to ensure high accuracy of results – simultaneous measurement of the working and reference signals;
• ability to vary the wavelength resolution value enables to view all the spectral features;
• position of the second cell right in front of the detector permits analyzing turbid samples.
• improved detection system – two thermostatted CDD detectors to ensure stability of results over time.

Performance parameters

Material of samples / application: Polymers and plastics : Food industry and agriculture : Environmental facilities : Analysis of various water types : Chemical industry : Medicine : Pharmaceutical manufacturing materials : Biological materials Optical scheme: Double beam Monochromator slit width, nm: 0.2/0.5/1/2/4 Wavelength range, nm: 190-1100 Scanning speed, nm/min: 2-12000 Photometric range, Abs: from –3.0 to +3.0 Photometric accuracy, A (@ 546 nm): ±0.003 Baseline stability, А (@ 500 nm): ≤ 0.0001 Long-term stability, А/h (@ 500 nm) : ±0.0005 Wavelength accuracy, nm (@ 656 nm): ±0.1 Stray radiation, % (@ 240 nm NaI): 0.03 Stray radiation, % (@ 340 nm NaNO2): 0.01 Monochromator – concave holographic grating with aberration correction: Yes Detector – silicon photodiode: Yes The detector is cooled with a Peltier element: Yes Radiation source: deuterium and halogen lamps Dimensions (L × W × H), mm: 690 × 590 × 290 Weight, kg: 23