Double Beam UV-Vis Spectrophotometer US-B20

The Double Beam UV-Vis Spectrophotometer US-B20 is specially designed with a double beam configuration, covering a wavelength range from 190 to 1100 nm. It incorporates a C-T monochromator and a 1600 L/mm holographic grating for precise measurements. Featuring 3D spectrogram measurement capability, it accommodates samples with dynamic changes, while its adjustable spectral bandwidth ranging from 1.0 nm to 5.0 nm enhances versatility. Compact in design, it includes a fixed 2-trench sample holder and utilizes deuterium and tungsten lamps as light sources, with automatic calibration for added convenience. Equipped with a photomultiplier sensor, digital signal processing, and USB interface, along with 4 quartz cuvettes, this spectrophotometer ensures high resolution, low stray light, enduring stability, and powerful software functionality.

Wavelength range190 to 1100 nm
Spectral bandwidth1.0 to 5.0 nm (adjustable)
Optical systemDouble beam, C-T monochromator, 1600 L/mm holographic grating
Wavelength accuracy±0.3 nm
Wavelength repeatability0.1 nm
Wavelength resolution0.05 nm
Wavelength edge noise100%T line ≤0.1%T;0%T line ≤0.05%T
Stray light0.015 %T (at 220nm and 360 nm)
Baseline flatness≤±0.001 Abs
Baseline noise±0.1 %T
Baseline drift≤0.0004 Abs / h (after warm-up at 500 nm)
Standard sample holderFixed 2 trench sample holder
Measuring length0 to 200% T, -4.000 to 4.000 Abs, -9999 to 9999C, -9999 to 9999F
Transmittance accuracy±0.3 %T
Transmittance repeatability0.1 % T
Light switching pointAdjustable; 294 nm to 365 nm
Light SourceDeuterium lamp, Tungsten lamp (20 W/12 V)
DetectorSilicon photodiode detector
InterfaceDigital signal; USB
Cuvette4 quartz cuvette; 10 mm optical path
Power supply220 V ± 10%, 50Hz
Power200 W
Dimension (L×W×H)620×510×245 mm
Package dimension (L×W×H)745×635×400 mm
Net weight30 kg
Gross weight39 kg

  • Work modes include T, A, C, E, and scanning speed range offers Hi, Med, Low (Max. 3000 nm/min)
  • Designed with a double beam 1200 lines/mm optical system
  • In-house massive memory capable of storing up to 1024 M for test data & working curves
  • Features a 10.1-inch high-resolution TFT colored capacitive touch screen and Windows Graphic interface
  • Large sample chamber accommodates 5 to 100 mm cuvettes of all kinds
  • Equipped with powerful functions including Photometric measurement, Quantitative measurement, Kinetics, Spectrum scan, DNA/Protein test, Multi-wavelength test, etc.
  • USB port facilitates data transfer, easily exportable to Excel for further processing
  • Socket type deuterium and tungsten lamp enables lamp switching without optics debugging and easy replacement

It finds widespread application in research facilities, laboratories, educational institutions, pharmaceuticals, hospitals, and medical fields. Its primary uses include diagnosing diseases and detecting impurities in organic compounds.


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