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Lasany LI-2904 Double Beam UV-VIS Spectrophotometer for Professional Laboratory Applications
The Lasany LI-2904 Double Beam Microprocessor UV-VIS Spectrophotometer is a laboratory analytical instrument designed for absorbance, transmittance and concentration measurements across ultraviolet and visible wavelengths. Its double-beam optical system, microprocessor control and variable spectral bandwidth support a range of scientific research, laboratory testing and quality control applications.
With a wavelength range of 190–1100 nm and selectable spectral bandwidth settings, the LI-2904 is designed for analytical work requiring flexible wavelength selection. Its measurement functions include photometric analysis, quantitative testing, wavelength scanning, kinetics, multi-wavelength analysis and DNA/protein testing.
The instrument is intended for professional laboratories in pharmaceutical analysis, biotechnology, chemical research, environmental testing, food testing, educational institutions and industrial quality control. The manufacturer also documents an eight-cell holder and a Peltier temperature controller with a sipper system for a specific LI-2904 configuration; confirm whether these accessories are included in the product being purchased.
Key Features of Lasany LI-2904
- Double-Beam Optical System: Measures sample and reference signals to help compensate for light-source fluctuations.
- Wide Wavelength Range: Supports UV-visible measurements from 190 to 1100 nm.
- Variable Spectral Bandwidth: Selectable bandwidth settings of 0.5, 1.0, 2.0 and 4.0 nm, as listed in the manufacturer’s datasheet.
- Touchscreen Operation: Provides a user interface for instrument control and analytical functions; verify the display specification for the supplied version.
- Multiple Measurement Modes: Supports basic photometry, quantitative analysis, wavelength scanning, kinetics, multi-wavelength testing and DNA/protein analysis.
- Automatic Eight-Cell Holder: Supports sequential sample measurements in the documented eight-cell configuration.
- Temperature-Controlled Analysis: A Peltier temperature controller is available in the documented temperature-control configuration.
- Sipper System: The documented configuration includes a peristaltic pump system for compatible sample handling.
- Computer Connectivity: USB data output and a parallel printer interface are listed in the manufacturer’s datasheet.
- Laboratory Applications: Designed for scientific research, pharmaceutical analysis, industrial testing and quality control workflows.
Technical Specifications
| Specification | Details |
|---|---|
| Brand | Lasany |
| Model | LI-2904 |
| Instrument Type | Double Beam Microprocessor UV-VIS Spectrophotometer |
| Optical System | Double beam |
| Grating | 1200 lines/mm, according to the published datasheet |
| Wavelength Range | 190–1100 nm |
| Spectral Bandwidth | Variable: 0.5, 1.0, 2.0 and 4.0 nm |
| Wavelength Accuracy | ±0.3 nm |
| Wavelength Repeatability | 0.2 nm |
| Photometric Accuracy | ±0.3% T |
| Photometric Repeatability | 0.2% T |
| Photometric Display Range | 0–200% T, -0.3 to 3.0 A, 0–9999 C |
| Stability | 0.001 A/h at 500 nm |
| Baseline Flatness | ±0.001 A |
| Noise | ±0.001 A |
| Stray Light | Less than 0.05% at 220 nm and 360 nm |
| Light Sources | Deuterium lamp and tungsten-halogen lamp |
| Detector | Silicon photodiode |
| Cell Holder | Automatic eight-cell holder in the documented configuration |
| Data Output | USB interface |
| Printer Interface | Parallel port |
| Temperature Control | Peltier system available in the specified configuration; documented range 15–65°C |
| Sample Handling | Sipper system available in the specified configuration |
| Weight | Approximately 26 kg, as listed in the manufacturer’s datasheet |
Applications of Lasany LI-2904
- Pharmaceutical Laboratories: UV-visible analysis and concentration measurements using validated methods.
- Biotechnology Research: Compatible DNA, RNA and protein analysis workflows.
- Chemical Research: Absorbance measurement, wavelength scanning and reaction monitoring.
- Environmental Testing: Analysis of prepared water and environmental samples.
- Food and Beverage Testing: Spectrophotometric analysis of suitable samples.
- Educational Laboratories: Scientific experiments, teaching and research projects.
- Industrial Quality Control: Routine analysis and comparison of prepared samples.
- Kinetics Studies: Monitoring absorbance changes over time for suitable analytical procedures.
Benefits for Professional Laboratories
The Lasany LI-2904 combines double-beam optics, variable spectral bandwidth and multiple analytical modes in a single benchtop instrument. These features provide flexibility for laboratories conducting routine measurements, spectral scanning, quantitative analysis and research studies.
The optional temperature-controlled and sipper configuration can support specialised workflows that require controlled sample temperature or automated sample delivery. Laboratories should confirm the exact instrument configuration, software, accessories and performance specifications before purchase.
Ordering and Configuration Information
The manufacturer publishes LI-2904 configurations with different accessories. Confirm whether the quotation includes the touchscreen version, eight-cell holder, Peltier temperature controller, sipper system, software, cuvettes, cables and manuals. Do not assume all optional components are included with the base instrument.
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Lasany LI-2904 Double Beam UV-VIS Spectrophotometer with Variable Bandwidth for Professional Laboratory Research and Analysis
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