Fluorescence Spectrophotometer Model No – LI-4000 


Discover accurate and advanced fluorescence analysis with our cutting-edge Fluorescence Spectrophotometer. Designed to provide precise measurements and insights, our spectrophotometer is a powerful tool for researchers, scientists, and professionals in various fields.

  • High Sensitivity: Our Fluorescence Spectrophotometer boasts high sensitivity, enabling the detection of even the faintest fluorescence signals, making it ideal for a wide range of applications.
  • Wide Spectral Range: With a wide spectral range, our spectrophotometer allows you to analyze fluorescence emissions across various wavelengths, providing comprehensive data for your experiments.
  • Intuitive Software: The user-friendly software interface simplifies data collection, analysis, and interpretation, enhancing your overall research experience.
  • Versatile Applications: Whether you’re conducting pharmaceutical research, environmental analysis, or material science experiments, our Fluorescence Spectrophotometer offers versatility to suit your diverse needs.
  • Accurate Results: Benefit from accurate and reliable results, crucial for drawing meaningful conclusions from your experiments and pushing the boundaries of scientific exploration.
  • Robust Build: Crafted with quality in mind, our spectrophotometer is built to withstand rigorous laboratory use, ensuring consistent performance over time.
  • Easy Integration: Seamlessly integrate our Fluorescence Spectrophotometer into your existing laboratory setup for a seamless workflow and enhanced productivity.


Fluorescence Spectrophotometer Model No – LI-4000 

Fluorescence Spectrophotometers provide valuable insights into the structural and functional properties of fluorescent compounds and enable researchers to perform sensitive and selective analyses.

Fluorescence Spectrophotometer is a scientific instrument used to measure the fluorescence properties of a substance. It operates based on the principle that certain compounds, when exposed to light of a specific wavelength, absorb that light energy and then emit light of a longer wavelength, a phenomenon known as fluorescence.

  • Light Source: Fluorescence spectrophotometers typically use a high-energy light source, such as a xenon lamp or a mercury arc lamp, to provide the excitation light. This light source emits light across a range of wavelengths.
  • Monochromators: These are optical filters that select specific wavelengths of light from the light source. In a fluorescence spectrophotometer, there are typically two monochromators: one for selecting the excitation wavelength and the other for selecting the emission wavelength. This allows researchers to control the specific wavelengths of light used for excitation and detection.
  • Sample Compartment: This is where the sample to be analyzed is placed. The sample is typically contained in a quartz cuvette, which is transparent to the wavelengths of light used in fluorescence spectroscopy.
  • Detector: After the sample is excited by the light source, it emits fluorescence at longer wavelengths. The detector in the spectrophotometer measures the intensity of this emitted fluorescence. Photomultiplier tubes (PMTs) are commonly used as detectors due to their high sensitivity to low levels of light.
  • Data Processing and Display: The signals from the detector are processed by the instrument’s electronics and then displayed on a screen or recorded for further analysis. This data can provide valuable information about the properties of the sample, such as its concentration or chemical composition.

Technical Specification

Excitation Light Source High Brightness LED
Excitation LED 250nm ~ 600nm(LED)
EX Wavelength Standard set: 365nm,376nm,392nm,405nm
Emission Monochromator C-T configuration diffraction grating monochromator Emission
Wavelength range (EM): 200nm~650nm, Bandwidth: 10nm
(Extend the Monochromator to Em200-900 is Optional)
Emission Wavelength Accuracy: ± 1nm
Emission Wavelength Reproducibility:≤0.5nm
S/N Ratio S/N≥90 (Using 1cm Quartz Sample Cell, Measure the
Signal Noise Ratio of Raman Spectrum of Water )
Detection Limit 1×10-10g / ml Quinine Sulfate Solution
Linearity (γ) ≥0.995
Repetitive Peak Intensity ≤1.5%
Zero Drift ≤0.3(within 10min
Power Type 220V±22V; 110V±22V
Dimensions 442 x 392 x 250 (mm)
Weight Net Weight 10kg
Gross Weight 12k