L7 Double Beam UV-VIS Spectrophotometer

L7 double beam UV-VIS spectrophotometers adopt double beam optical system, and blazed holographic gratings. 

  • 190–1100 nm
  • 1.8 nm Bandwidth
  • ±0.3 nm Accuracy
  • ≤0.03%T Stray Light
L7 Manual
L7 Brochure

Features of L7 Double Beam UV-VIS Spectrophotometer

  • 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
  • Kinetic scanning
  • Inear regression curve analysis
  • High-capacity internal memory
  • Power-off protection
  • Full-spectrum scanning 
  • Linear regression 
  • Detailed spectrum scanning
  • Concentration on direct reading 
  • Time-based kinetics determination 
  • Peak / Valley detecting 
  • GOTO λ 
  • Multi-wavelength measurement 

Applications of L7 Double Beam UV-VIS Spectrophotometer

DV-8200 Application in Education & Teaching Laboratories

Education & Teaching Laboratories

Widely used in teaching laboratories for demonstrating Beer-Lambert Law, calibration curves, and basic qualitative and quantitative analysis of colored solutions.

DV-8200 Application in Chemical & Industrial Process Control

Chemical & Industrial Process Control

Measuring absorbance-based color intensity and tracking reaction kinetics in dyes, coatings, inks, and electroplating solutions for routine industrial quality control.

DV-8200 Application in Pharmaceutical & Biotech Quality Control

Pharmaceutical & Biotech Quality Control

Used for quantitative analysis of APIs and finished products with visible absorbance, dissolution testing, and optional basic DNA/protein quantification and reaction kinetics monitoring via PC software.

DV-8200 Application in Water & Environmental Analysis

Water & Environmental Analysis

Used for routine colorimetric determination of ammonia nitrogen, total phosphorus, Cr⁶⁺, nitrite, and volatile phenols in environmental water quality monitoring.

DV-8200 Application in Food & Agricultural Quality Control

Food & Agricultural Quality Control

For colorimetric detection of nitrite, nitrate, phosphate, peroxide value, and pigments in food and agricultural products for quality control compliance.

FAQ

Yes. Full-spectrum and detailed spectrum scanning are supported.

Yes. It supports linear regression and direct concentration readout.

Yes. Time-based kinetic measurement at a fixed wavelength is supported.

Yes. Multi-wavelength measurement is one of the standard analytical functions.

Yes. Peak / Valley detection is supported during spectral analysis.

The Brochure specifies ≤±0.002 A from 200 to 1090 nm.

Stray light is ≤0.03%T at 220 nm using NaI and 360 nm using NaNO₂.

Yes. Internal memory stores testing results, scanned spectra, regression equations and correction data.

Yes. It includes a USB COM port, with optional PC software available for additional data processing and spectrum analysis.

Specifications of L7 Double Beam UV-VIS Spectrophotometer

ModelL7
PhotometryDouble Beam
Monochromator TypeCzerny-Turner
Focal Length160mm
Grating1200 lines/mm
DetectorSilicon Photocell
Spectrum Bandwidth1.8nm
Wavelength Setting8-inch color touch-screen
Wavelength Range190-1100nm
Wavelength Accuracy±0.3nm
Wavelength Repeatability≤0.1nm
Scanning SpeedFast-Medium-Slow
Stray Light≤0.03%T (at 220nm NaI, 360nm NaNo2)
Photometric Range0.0-200.0% T
0.301-4.000 A
0.000-9999 C
Photometric Accuracy±0.3% T
±0.004 Abs (0-0.A)
±0.008 Abs (0.5-A)
Photometric Repeatability≤0.15% T
0.001 Abs (0-0.5A)
0.002 Abs (0.5-1A)
Baseline≤±0.002 A(200-1090nm)
Noise100% (T) noise≤0.15%(T), 0% (T) noise≤0.1%(T)
Drifting≤0.0009 Abs/h (250nm and 500nm after 2h warm up)
PowerAC220V±22V 50Hz±1Hz, 200W
Packaging Size710mm X 590mm X 505mm 0.21m³ 36kg

Accessories of L7 Double Beam UV-VIS Spectrophotometer

Standard Accessories

  • Operation manual 1pc
  • Glass cuvette 10mm 4pcs
  • Quartz cuvette 10mm 2pcs
  • Power cable 1pc
  • Fuse 2pcs
  • Cuvette holder 10mm

Optional Accessories

  • UV WIN8 station pro software
  • NO optional cuvette holder

Why Choose Us?

  • One-Station Shopping

“Multiple suppliers” have always been an issue in the procurement process. Drawell as a one-stop laboratory equipment and scientific instruments supplier, can perfectly solve this problem. In addition to manufacturing our own equipment, we also represent other laboratory equipment. Our product lines are rich and diverse at competitive prices. Provide one-stop service to customers.

  • Customer-centric Services

User Training – Training by Drawell skilled engineers about installation, debug tests, technical services, etc. It can happen in our factory in China, or at the site in the customers’ country. Cost depends on where and when the training happens.

  • Online Support

To discuss the problem and get it resolved, online chats, real-time video calls, and remote guidance. For the after-sales stage, our online technical guidance is free and ready forever.

  • 100% Quality Guarantee Policy

1 year free official warranty, including repairing quality-damaged parts, and offering replacements of selected parts (shipping cost is extra). 5% of the product price is charged for extending the warranty before the end of the official warranty.

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