Double Beam UV-VIS Spectrophotometer LI-2800 EX

About Double Beam UV-VIS Spectrophotometer LI-2800 EX

Microprocessor UV-VIS Double Beam Spectrophotometer Exclusive Model (Variable Bandwidth) | Model LI-2800 EX

Elevate your laboratorys analytical precision with theLI-2800 EX, an Exclusive Model double-beam spectrophotometer engineered for high-end research and stringent quality control [1, 2, 4]. Designed with a sophisticatedvariable bandwidthsystem and a true double-beam optical path, this instrument delivers the stability and accuracy required for complex biochemical, pharmaceutical, and environmental testing [1, 3, 5].

Advanced Optical Design & Variable Bandwidth :

Unlike standard fixed-bandwidth models, the LI-2800 EX features an adjustable spectral bandwidth (0.5, 1, 2, 4, and 5 nm) [1, 2, 6]. This flexibility allows researchers to optimize the trade-off between signal-to-noise ratio and spectral resolution, making it ideal for identifying sharp peaks in complex chemical samples [1, 2, 12]. TheDouble Beamsystem, powered by a 1200 lines/mm holographic grating, ensures minimal drift and high stability by simultaneously monitoring the sample and the reference [1, 3, 5].

Intelligent Microprocessor Control :

Equipped with a powerful microprocessor, the LI-2800 EX offers an intuitive user experience through its320 x 240 dots graphic LCDand a 30-key alphanumeric membrane keypad [1, 2, 5]. The system supports fully automated operations, including:

• Automatic Wavelength Calibration:Ensuring data integrity with every startup [1, 12].
• Dark Current Correction:Maintaining precision even at low light levels [1].
• Auto-Cell Changer:Often paired with an8-cell holderfor high-throughput automated measurements [1, 2, 5].

Versatile Operational Modes:

The instrument is pre-loaded with comprehensive software functions to handle diverse workflows:

• Photometric Mode:Measure Absorbance and Transmittance at specific wavelengths [1, 2, 5].
• Quantitative Mode:Build standard curves using up to 10 points for precise concentration analysis [1, 2].
• Multi-Wavelength:Test samples at multiple points simultaneously [1, 2, 5].
• Kinetics & Time Scan:Monitor reaction rates and enzymatic activity over time [1, 5, 12].
• DNA/Protein Analysis:Dedicated algorithms for calculating ratios and concentrations in life science applications [1, 2, 5].
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Key Technical Specifications:

• Wavelength Range:190 1100 nm [1, 2, 6].
• Wavelength Accuracy:0.3 nm (at full range) [1, 2].
• Stray Light: 0.05% T at 220 nm and 340 nm [1, 2, 5].
• Photometric Range:-0.3 to 3.0 A | 0 to 200% T [1, 2].
• Light Sources:Pre-aligned Deuterium (UV) and Tungsten Halogen (Visible) lamps for easy maintenance [1, 2].
• Data Connectivity:USB and Parallel ports for PC linking and direct printing [1, 2]