These instruments are miniature fiber optic spectrometers used to measure fluorescence.  They connect to a sampling area using a 1000um fiber optic cable. The units have offer a wide spectral range based upon the application requirements. The detector is a highly sensitive Charge Coupled Device (CCD) which provides 7 decades of dynamic range.  Flourescence measurements are most suited for StellarNet's concave grating spectrometers.  The EPP2000C-TEC spectroflourimeter has an integrated Thermo Electric Cooler (TEC) maintained at –10 °C and stabilized within +/-0.1°C.  The spectrograph has a permanently installed slit to set the spectrofluorometer optical resolution. 

Operationally, the spectrofluorometer is connected to a fiber optic cuvette sample holder or directly to a fiber optic chemical sensor. In either case, the sample is excited with a specific range of light wavelengths and then monitored for fluorescent emissions at higher wavelengths. Additional optical channels can be attached to configure for traditional dual-beam and other multi-beam process monitor configurations.

Excitation Sources  
With the emergence of low cost narrow band LEDs, StellarNet is now offering a multitude of different LED wavelengths to suite your specific excitation application.  StellarNets' SL1-LED excitation source is ideal for Fluorescence measurements.  The light source includes the SL1-Blue plus an LED kit consisting of 6 Visible range LED’s and a White LED.  LED’s can be swapped without any wiring changes - just pull one out and push the next one in!


     

SL1-Blue plus LED kit emission spectrum LED Emission Spectra can be used for Fluorescence Excitation
 

          
UV-VIS & Fluorescence Measurements
- low stray light concave gratings optics allow Deep UV measurements
- Concave gratings provide uniform resolution over 190-1100nm
- LED excitation source for low cost alternative to laser or bandpass filters


Power and InterFace
The instruments are constructed in a small metal enclosure of 6x3.5x1.5 inches, with a fiber optic SMA connection on the front panel. Portable spectrometers have an easy to use plug and play interface with USB-2 connection and +5VDC power adapter for 120VAC-60HZ. These power adapters are small wall mount transformers with U.S. style 2 prong plugs. For usage outside the U.S.A., we offer an upgrade to universal power adapters. If you don't have a USB-2 port, connecting the spectrometer to a second EPP printer port on your computer is most convenient and recommended. For portable notebook computers that don't have a USB-2 port or an EPP capable printer port, we offer the PCMCIA card style EPP interface.














SpectraWiz Software-
CIELAB Color Measurement Application and Data Log work with live spectra can give you color measurements of your emitting species!!!

 
CUV-F
Fluorescence fixture includes a large base to accommodate the SL1-LED excitation source. Includes 600 micron Y-fiber for dual pick-up for x2 signal gain in fluorescence detection.                            




Experimental Flourescence Setup using EPP2000C-TEC Concave Grating Spectrometer, F1000 Fiber Optic Cable, CUZ-1 cuvette holder, and SL1 excitation source See more StellarNet Measurement and Setup Diagrams!!!

Detectors
The units have an integrated data digitizer with a 4096 count magnitude for any detector integration period.  The detector can be selected to integrate from 4 milliseconds to 60 seconds, extending the detection limits for small signals.  A decade of dynamic range includes the selected integration period  2.

StellarNet Accessories- LED kit emission spectrum using EPP2000 spectrometer.  LEDs are available for many excitation wavelengths