Fluorescence Spectrophotometer Model No – LI-4000
$630,000.00
The Lasany LI-4000 Fluorescence Spectrophotometer delivers ultra-sensitive trace-level detection with a detection limit of 1×10⁻¹⁰ g/mL and S/N ≥ 90 — far exceeding UV-VIS absorption sensitivity. Powered by a high-brightness LED source (250–600nm) with four standard excitation wavelengths (365, 376, 392, 405nm), it employs a C-T diffraction grating monochromator for emission wavelength selection across 200–650nm (optional 200–900nm). Linearity γ ≥ 0.995 and zero drift ≤0.3 ensure reliable quantitative analysis. Compact 10kg design with universal 110V/220V power. Ideal for pharmaceutical, environmental, biochemistry, and food safety applications. ISO 9001:2015 certified. Request a Quote today.
Description
The Lasany LI-4000 Fluorescence Spectrophotometer is a high-performance analytical instrument designed for the ultra-sensitive detection and quantification of fluorescent compounds across a wide range of scientific and industrial applications. Manufactured by Lasany International under ISO 9001:2015 and CE certification in Panchkula, Haryana, the LI-4000 employs a high-brightness LED excitation source covering 250nm to 600nm, with a C-T configuration diffraction grating monochromator for emission wavelength selection across the 200nm to 650nm range. Unlike conventional xenon lamp fluorescence instruments with high energy consumption and limited lamp lifespans, the LI-4000’s LED-based excitation system provides stable, long-life illumination at four standard excitation wavelengths — 365nm, 376nm, 392nm, and 405nm — covering the most commonly used fluorescence excitation bands in pharmaceutical, biochemical, and environmental analysis. With a signal-to-noise ratio of S/N ≥ 90 and a detection limit of 1×10⁻¹⁰ g/mL using quinine sulfate solution, the LI-4000 delivers the sensitivity required for trace-level fluorophore detection in complex matrices. Excellent linearity (γ ≥ 0.995), tight zero drift (≤0.3 within 10 minutes), and low repetitive peak intensity variation (≤1.5%) ensure that the LI-4000’s quantitative results are reproducible, reliable, and analytically defensible. An optional emission monochromator extension to 200–900nm is also available, further expanding the instrument’s analytical range for specialised research applications. Compact at 442×392×250mm and just 10kg net weight, the LI-4000 is designed for efficient benchtop deployment in both established research laboratories and space-constrained quality control environments.
Key features
- High-brightness LED source Energy-efficient, long-life LED excitation covering 250–600nm — replacing conventional xenon lamps.
- S/N ≥ 90 sensitivity Signal-to-noise ratio ≥90 using 1cm quartz cell Raman spectrum of water — exceptional sensitivity.
- Detection limit 1×10⁻¹⁰ g/mL Ultra-trace detection capability down to 100 picograms per millilitre using quinine sulfate.
- C-T grating monochromator C-T diffraction grating for precise emission wavelength selection with ±1nm accuracy.
- EM range 200–650nm Wide emission wavelength range with optional extension to 200–900nm for research applications.
- Linearity γ ≥ 0.995 Excellent linear response across the full measurement range for reliable quantitative analysis.
- Stable zero drift ≤0.3Tight baseline stability within 10 minutes of warm-up for immediate, reliable measurement.
- Universal power supply 220V ± 22V and 110V ± 22V compatibility for global laboratory deployment.
Technical specifications
| Model | LI-4000 |
| Excitation light source | High brightness LED |
| Excitation range (LED) | 250 – 600 nm |
| Standard EX wavelengths | 365nm · 376nm · 392nm · 405nm |
| Emission monochromator | C-T configuration diffraction grating |
| Emission wavelength range | 200 – 650 nm (optional: 200–900nm) |
| Emission bandwidth | 10 nm |
| Emission wavelength accuracy | ± 1 nm |
| Emission wavelength reproducibility | ≤ 0.5 nm |
| S/N ratio | ≥ 90 (1cm quartz cell, Raman water) |
| Detection limit | 1 × 10⁻¹⁰ g/mL (quinine sulfate) |
| Linearity (γ) | ≥ 0.995 |
| Repetitive peak intensity | ≤ 1.5% |
| Zero drift | ≤ 0.3 (within 10 min) |
| Upper limit change | ≤ 1.5% within 10 min (display ≥ 50) |
| Power supply | 220V ± 22V · 110V ± 22V |
| Dimensions | 442 × 392 × 250 mm |
| Net weight | 10 kg |
| Gross weight | 12 kg |
| Certification | ISO 9001:2015 · CE |
Applications
- Pharmaceutical trace analysis
- DNA/RNA quantification
- Environmental monitoring
- Water quality testing
- Biochemistry research
- Food safety & mycotoxins
- Clinical diagnostics
- Academic research labs
Why choose the LI-4000?
- Ultra-trace sensitivity beyond the reach of UV-VIS absorption — with a detection limit of 1×10⁻¹⁰ g/mL and S/N ≥ 90, the LI-4000 detects fluorescent analytes at concentrations up to 1,000× below the practical sensitivity limit of UV-VIS absorption spectrophotometers — opening analytical access to trace vitamins, enzyme co-factors, environmental contaminants, mycotoxins, and pharmaceutical impurities that UV-VIS simply cannot reliably quantify.
- LED excitation delivers superior stability and lower running costs — high-brightness LED sources offer dramatically longer operational life, lower power consumption, and greater intensity stability than conventional xenon lamp systems — eliminating frequent and costly lamp replacements while delivering more stable baseline performance across extended measurement sessions.
- Excellent linearity (γ ≥ 0.995) supports reliable quantitative analysis — the LI-4000’s ≥0.995 linearity coefficient ensures that calibration curves remain accurate across the measurement range, supporting the quantitative precision required for regulatory submissions, research publications, and quality control compliance documentation.
- Optional emission extension to 900nm for NIR fluorescence — with an optional monochromator extension to 200–900nm emission range, the LI-4000 can be configured for near-infrared fluorescence studies — enabling advanced research applications in photochemistry, material science, and NIR-active fluorophore analysis without requiring a separate instrument.
- ISO 9001:2015 certified with global power compatibility — manufactured by Lasany International with CE certification and dual 110V/220V power compatibility, the LI-4000 is ready for laboratories across India and international markets, backed by Lasany’s dedicated after-sales technical support network.
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
Reviews
There are no reviews yet.