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CXR-FS Fluorescence System
Feb 2007
StellarNet Inc.Request Info
TAMPA, Fla., Feb. 23, 2007 -- StellarNet Inc., a maker of miniature fiber optic spectrometers and accessories for spectroscopic and optical measurements, has announced the CXR-FS, a low-cost system for fluorescence spectroscopy. The components include a miniature fiber-optically coupled, thermoelectrically-cooled (TEC) ultraviolet-visible (UV-VIS) light spectrometer with concave grating, an LED-based excitation source and a dual-read cuvette sample holder.

CXR-FSystem.jpgThe excitation source allows for interchangeable LEDs emitting at a variety of wavelengths, from UV through VIS. For example, UV LEDs at 295 nm and 345 nm are used for analysis of aromatic hydrocarbons. According to the company, this is a low-cost alternative to expensive lasers, bandpass filters and monochrometers.

Liquid samples are placed the CUV-F cuvette holder which accommodates the SL1-LED excitation source. The spectrometer detects fluorescence via dual-port fiber optic Y-cable that doubles the signal and covers the 280-900 nm detection range. The TEC improves signal to noise by 60 percent when exposure times are longer than 3 seconds.

The optical bench contains no moving parts, providing shock-proof durability in a portable environment for lab and field measurements. The included SpectraWiz software suite works for fluorescence applications such as biomedical (DNA stains and dyes), amino acid analysis (tryptophan/tyrosine), environmental (water contaminants) and general chemistry experiments. SpectraWiz includes Windows drivers with customizable programs for LabVIEW, Visual Basic Automation for Excel, Visual C++ and Delphi Pascal.

For more information, visit:; e-mail:

StellarNet Inc.
14390 Carlson Cir.
Tampa, FL 33626
Phone: (813) 855-8687
Fax: (813) 855-2279


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1. The process by which an atom acquires energy sufficient to raise it to a quantum state higher than its ground state. 2. More specifically with respect to lasers, the process by which the material in the laser cavity is stimulated by light or other means, so that atoms are converted to a semistable state, initiating the lasing process.
The emission of light or other electromagnetic radiation of longer wavelengths by a substance as a result of the absorption of some other radiation of shorter wavelengths, provided the emission continues only as long as the stimulus producing it is maintained. In other words, fluorescence is the luminescence that persists for less than about 10-8 s after excitation.
The technology of generating and harnessing light and other forms of radiant energy whose quantum unit is the photon. The science includes light emission, transmission, deflection, amplification and detection by optical components and instruments, lasers and other light sources, fiber optics, electro-optical instrumentation, related hardware and electronics, and sophisticated systems. The range of applications of photonics extends from energy generation to detection to communications and...
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