Fluorescence Spectrophotometer Model No – LI-4400
$1,490,000.00
Fluorescence Spectrophotometer LI-4400 — Variable Precision, Unmatched Sensitivity
The Lasany LI-4400 Fluorescence Spectrophotometer sets a new benchmark in molecular luminescence analysis with selectable excitation and emission slits (2nm, 5nm, 10nm, 20nm) and an exceptional water Raman peak S/N ratio exceeding 200 (P-P) — surpassing international standards. Powered by a 150W Hamamatsu Xenon lamp with a 200–900nm spectral range and 48,000 nm/min scan speed, it delivers ultra-trace detection down to ≤1×10⁻¹⁰ g/mL. Ideal for pharmaceutical, biochemical, food safety, and environmental labs requiring precise spectral bandwidth control and reproducible fluorescence results. ISO 9001:2015, WHO-GMP, and CE certified.
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Description
The Lasany LI-4400 Fluorescence Spectrophotometer is a premium-grade molecular luminescence analysis instrument built for laboratories that require the highest levels of detection sensitivity, spectral flexibility, and measurement precision. As an advanced upgrade over standard fluorescence spectrophotometers, the LI-4400 features selectable excitation and emission slits (2nm, 5nm, 10nm, 20nm), a 150W Hamamatsu Xenon light source, and an industry-leading water Raman peak signal-to-noise ratio exceeding 200 (P-P) — surpassing both domestic and international benchmarks. Certified to ISO 9001:2015, WHO-GMP, and EN-61326-1:2013, the LI-4400 is the instrument of choice for pharmaceutical, biochemical, clinical, food safety, and environmental laboratories that demand superior analytical control.
Key Features
- Variable slit selection — excitation and emission slits selectable at 2nm, 5nm, 10nm, and 20nm for customized spectral bandwidth control
- Ultra-high sensitivity — water Raman peak S/N ratio exceeding 200 (P-P), surpassing leading international standards
- 48,000 nm/min scan speed — world-class scanning performance powered by high-speed digital signal processing
- Double monochromator design — covering 200–900nm excitation and emission wavelength range for comprehensive fluorescence analysis
- Excitation light dual beam ratio monitoring — maintains stable, high fluorescence signal output across all measurement conditions
- Built-in optical gate — specifically designed to handle photosensitive and unstable samples with confidence
- Hamamatsu Xenon light source with PMT detector — ensures maximum light intensity, detection sensitivity, and instrument longevity
- High linearity (γ ≥ 0.995) with peak repeatability ≤1.5% for dependable quantitative analysis
- USB 2.0 data output for seamless PC connectivity and result management
- Comprehensive optional accessories including Peltier temperature-controlled cell holder, membrane and powder sample holders, auto polarization filter, double frequency filters, and multi-function adapter
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | LI-4400 |
| Excitation Source | 150W Xenon Lamp (Hamamatsu) |
| Excitation Wavelength | 200–900 nm |
| Emission Wavelength | 200–900 nm |
| Excitation Slit | 2nm / 5nm / 10nm / 20nm (Selectable) |
| Emission Slit | 2nm / 5nm / 10nm / 20nm (Selectable) |
| Wavelength Accuracy | ±1.0 nm |
| Wavelength Repeatability | 0.5 nm |
| Signal-to-Noise Ratio | S/N ≥200 (P-P); S/N ≥800 (RMS) |
| Detection Limit | ≤1×10⁻¹⁰ g/mL (Quinine Sulfate Solution) |
| Linearity | γ ≥ 0.995 |
| Peak Repeatability | ≤1.5% |
| Stability (10 min) | Zero Drift ±0.3; Value Limit ±1.5% |
| Wavelength Scan Speed | Multi-speed, max 48,000 nm/min |
| Photometric Quantity Range | 0.00–10,000.00 |
| Data Transportation | USB 2.0 |
| Power | 200W |
| Power Source | AC 220V/50Hz; 110V/60Hz |
| Dimensions | 380 × 445 × 310 mm |
| Weight | Net 12 kg / Gross 14 kg |
Applications
The LI-4400 Fluorescence Spectrophotometer serves a wide range of high-demand analytical environments. In pharmaceutical analysis and drug research, it enables precise fluorescence quantification of active compounds, metabolites, and trace impurities. Biochemical and clinical laboratories use it for protein, enzyme, DNA, and biomarker detection at ultra-low concentration levels. Its exceptional sensitivity and variable slit design make it ideal for environmental monitoring and water quality testing, including organic pollutant and heavy metal analysis. In food safety laboratories, it reliably detects trace contaminants such as aflatoxin, selenium, and vitamin C in dairy, aquatic, and agricultural products. Material science and university research labs also rely on the LI-4400 for 3D fluorescence mapping and advanced photoluminescence studies.
Benefits of the LI-4400
The defining advantage of the LI-4400 over the standard LI-4200 model is its selectable slit widths — a feature that gives analysts precise control over spectral bandwidth, allowing them to optimize sensitivity versus resolution depending on the specific analyte and matrix being measured. Narrow slits (2nm) deliver maximum spectral resolution for complex mixture analysis, while wider slits (20nm) increase light throughput for weakly fluorescent samples. Combined with an S/N ratio exceeding 200 (P-P) — significantly higher than the LI-4200’s 150 (P-P) threshold — the LI-4400 is the preferred choice for laboratories conducting trace-level analysis, complex multi-component fluorescence work, or research requiring fine spectral discrimination. The Peltier temperature control accessory further extends its capabilities to kinetic studies and temperature-sensitive biological assays, making the LI-4400 a genuinely research-grade fluorescence spectrophotometer at an accessible price point.
Why Choose Lasany International
Lasany International is an ISO 9001:2015 and WHO-GMP certified manufacturer recognized for delivering internationally compliant, high-performance laboratory instruments to research, pharmaceutical, and academic institutions across India and globally. The LI-4400 carries CE marking and EN-61326-1:2013 certification — assuring laboratories of its compliance with international electronic equipment standards for measurement and laboratory use. With a full ecosystem of optional accessories, dedicated technical support, and competitive pricing, the LI-4400 represents one of the most complete fluorescence spectrophotometer solutions available from an Indian manufacturer.
Get in Touch with Us: –
Panchkula, Haryana
Website: https://lasany.org/
Address: SCF-132, Sector 17, Panchkula, Haryana 134109
Email:- lasanyinternationalindia@gmail.com,sales@lasanyspectrophotometers.com
Online Support:- 9888911439 / 9803017479
If you are looking for laboratory, analytical, and medical products, then Lasany International is the perfect choice for you
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