Edinburgh 900 series Fluorimeter System

Precision Luminescence: The Edinburgh Instruments Fluorimeter System

In the specialized field of photochemistry, the ability to detect and resolve low-level light signals is the gold standard for research. The Edinburgh Instruments Fluorimeter System (specifically the FLS920/900 series pictured) is a premier modular platform designed for both steady-state and time-resolved fluorescence spectroscopy.

For our website, here is an analysis of the specific value this system brings to our laboratory's capabilities.

1. Unmatched Sensitivity via Single Photon Counting

Unlike standard fluorimeters that use analog detection, this system utilizes Single Photon Counting (SPC). This is the most sensitive technique available for measuring low-level optical radiation.

• Weak Emitters: Enables the study of samples with extremely low quantum yields that would be lost in the "noise" of lesser instruments.

• High Signal-to-Noise Ratio: Provides a water Raman S/N ratio often exceeding $6000:1$, ensuring that even the subtlest spectral features are clearly defined.

2. High-Performance Excitation: The Xe900 Source

The large vertical unit shown in our lab is the Xe900 450W Xenon Arc Lamp power supply.

• Broadband Coverage: Provides a continuous, high-intensity output from the UV to the Near-IR ($230\text{–}2600\text{ nm}$).

• Ozone-Free Safety: Designed for stable, long-term operation without the need for complex external venting for ozone gas, maintaining a cleaner lab environment.

3. Modular Versatility and Spectral Resolution

The system’s modular "L-shape" or "T-shape" configuration allows us to customize the optical path for diverse research needs.

Czerny-Turner Monochromators

Exceptional stray-light rejection, critical for highly scattering samples or thin films.

Triple Grating Turret

Allows us to switch between UV, Visible, and NIR gratings via software without manual hardware changes.

Time-Resolved Capabilities

Can be upgraded with pulsed lasers or flashlamps to measure fluorescence lifetimes from picoseconds to seconds.

4. Advanced Data Control with F900 Software

The integrated software suite transforms complex hardware into a streamlined research tool.

• Automated Scans: Fully computer-controlled slits and wavelength tuning for repeatable, high-accuracy measurements.

• Correction Factors: Automatically applies lamp and detector response corrections, ensuring that the spectra we publish represent the true photophysical properties of the material.

• Quantum Yield Wizard: Simplifies the calculation of absolute and relative quantum yields, a staple requirement for photochemical publications.

5. Stability for Demanding Materials

As seen in our lab setup, the system is mounted on a TMC CleanTop Optical Table. This isolation, combined with the instrument’s robust internal optics, allows us to perform high-resolution scans ($<0.1\text{ nm}$ steps) without interference from building vibrations or thermal drift.