L7 Double Beam Spectrophotometer

Wavelength Range: 190-1100nm
Wavelength Accuracy: ±0.5nm
Wavelength Repeatability: ≤0.2nm

  • Double beam optical system
  • 8-inch color touch-screen
  • Automatic zero and full-scale adjustment
  • Automatic wavelength settings
  • Equipped with USB COM port
  • UV WIN8 Spectrum Data Processing Software optional
  • Thermal plotter optional

Main Features

1: L7 double beam UV-VIS spectrophotometers adopt double beam optical system, and blazed holographic gratings.They have outstanding test precision and very competitive prices.
2: 8-inch color touch-screen,cutting-edge user interface,powerful functions,and easy operation.
3: With powerful functions, the equipment shows great performance in qualitative and quantitative testing, such as:

  • Full-spectrum scanning •Linear regression
  • Detailed spectrum scanning •Concentration direct reading
  • Time-based kinetics determination •Peak/Valley detecting
  • GOTO λ •Multi-wavelength measurement

4: The equipment is designed with sophisticated power protection system.With high capacity of internal memory, it can store testing results, scanned images, regression equations and correction data.Therefore, it follows a fast initialization when power on.
5: The instrument can be connected with the dedicated printer, which can print testing results, or draw the curve from spectral scanning, fixed wavelength time-based scanning, and linear regression.
6: With USB COM port the device can be connected to a PC, which can not only enhance the performance in data testing and spectrum scanning but also expand the memory to save more testing results.


PhotometryDouble Beam
Monochromator TypeCzerny-Turner
Focal Length160mm
Grating1200 lines/mm
DetectorSilicon Photocell
Spectrum Bandwidth2nm
Wavelength Setting8-inch color touch-screen
Wavelength Range190-1100nm
Wavelength Accuracy±0.5nm
Wavelength Repeatability≤0.2nm
Spectrum SpeedFast-Medium-Slow
Stray Light≤0.03%T(at 200nm Nal,360nm NaNo2)
Photometric Range0.0-200.0%T



Photometric Accuracy±0.3%T



Photometric Repeatability≤0.15%T



Drifting≤0.0009Abs/30min(250nm and 500nm after 2h warm up)
PowerAC220V±22V 50Hz±1Hz,220W
Packaging Size740mm×630mm×4500mm 0.21M3 35kg

Standard Accessories
Operation manual: 1 copy
Glass cuvette 1cm: 4 pcs
Quartz cuvette 1cm: 2 pcs
Power cable: 1 pcs
Fuse :  2 pcs

Optional Accessories
UV WIN8 Spectrum data processing software
Thermal plotter


Download Brochure 1

Download Brochure 2