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StellarNet miniature research grade spectrometers
allows for low cost measurements in the UV-VIS-NIR
wavelength ranges. These instruments
can measure species absorption,
emission, fluorescence, transmission, concentration, and
color, using the free
SpectraWiz® operating
software for any version of Microsoft
Windows right on your desktop or portable notebook
computer. The
BLACK-Comet series
concave grating spectrometers cover wavelength ranges 190-1100nm
in four different configurations. The superior concave
grating and silicon based CCD allow for accurate and reliable
measurements at an unmatched cost. The
RED-Wave NIR InGaAs series spectrometers cover the near
infrared wavelength regions from 900-2300nm with either 512 or
1024 element cooled photodiode arrays. StellarNet's spectrometers are
ruggedized, durable, and the perfect instrument for any lab or
field application.
Spectrum of simulated chemical reaction using
SpectraWiz software allows
for time series analysis of batch titrations and in process
monitor and control.
 
StellarNet
Accessories- Dip probes and flow cells are available to measure absorbance, color, and
analyze concentrations
of liquids for in process and kinetics studies. Cuvette holders and
integrate light source cuvettes holders are also available.
- Dip Probe – fast, easy sampling
of liquids.
- ATR probes available for dark,
viscous liquids
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Cuvette – 1cm
standard pathlengths
- Adjustable fixtures available
for longer cells
- Integrated cuvette/light sources
- Compact, cost-effective
alternative
Spectroscopy Software
The SpectraWiz Spectroscopy Software is included for real-time
spectral analysis, episodic spectral capture, ChemWiz concentration
analysis, and has applications for Colorimetry, Radiometry and OES
spectroscopy. Look for StellarNet concave grating based fluorescence
systems for your next fluorimetry application!
ChemWiz Concentration Analyzer
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Application panel works with live spectra to allow
concentration
calibration using single wavelength PLS.
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Load previously developed PLS chemical calibrations for concentration
display of unknown samples.
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Episodic capture for kinetics and time series analysis
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Performs single wavelength linear PLS calibrations.
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Ideal for in-line batch and on-line process monitoring
Fluorescence Measurements
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low stray
light concave gratings optics allow Deep
UV measurements
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Concave gratings provide uniform
resolution over 190-1100nm
- LED excitation source for
low cost alternative to laser or bandpass filters
2nd Derivative data using
SpectraWiz of various plastics,
used for identification in recycling plants
DWARF-Star NIR Spectrometer-
SpectraWiz Software displaying a
time series increase of NIR water absoprtion bands.
Power and
Interface
The instruments are
constructed in a small rugged enclosure, 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. |
StellarNet SpectroChemistry Systems-
StellarNet UV-VIS-NIR systems covers a 190-2300nm range with fiber optic light sources and
accessories. Pictured above is a
StellarNet low cost UV-VIS system
Low Cost UV-VIS Absorbance System
StellarNet’s Low Cost UV-VIS Spectrometer system is
composed of the BLACK-Comet research grade concave
grating spectrometer, a SL5 high stability light source with
integrated cuvette holder, and an optical coupling fiber.
Various Spectrometer configurations allow for extended
wavelength ranges from 200-1100nm and resolutions to
0.75nm. The BLACK-Comet utilizes aberration corrected
optics allowing for enhanced UV sensitivity, reduced stray
light, uniform resolution, and superb spectral imaging. The
SL5 lamp combines deuterium and tungsten halogen light
to form a single optical path with individual bulb power
control and front and rear panel shutter control. Spectral
acquisition and analysis is made easy with SpectraWiz®,
StellarNet’s powerful spectroscopy software package that
gives the user complete control of their UV-VIS
absorption measurements.
Quick
Facts-BLACK-Comet
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Concave grating provides high sensitivity
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Consistent resolution
throughout wavelength range (due to flat field
created by special concave grating)
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No mirrors for lowest possible stray light
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Extremely rugged with no moving parts
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Shock-proof durability and permanent alignment
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Miniature size, low cost, portable
instrumentation
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Battery pack options for field measurements
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Simple USB2 interface to notebook & desktop PCs
See more about
StellarNet's Concave Grating Spectrometers!!!
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Low Cost NIR
Spectroscopy Systems
StellarNet’s newest NIR spectrometer, the DWARF-Star, is
small, robust, and equipped with high performance InGaAs detector array
for the 900-1700nm wavelength range and achieves resolving resolutions
to 1.25nm.
The DWARF-Star features no moving parts
and is packaged in a small rugged metal enclosure (5”x3”x2”) for
portable, process, and OEM applications. Advancements in electronic and
optical design have allowed for size reduction never before achieved in
a NIR spectrometer.
SpectraWiz software interface displaying raw NIR
reflectance spectra of dietary supplement powders
with inset multivariate calibration model
Software and Development
Each
DWARF-Star
includes free SpectraWiz®
Software and a developer’s toolbox of source codes, customizable demo
programs, and full spectroscopy applications in LabVIEW, Visual Basic,
Delphi Pascal, and MS Visual C. High speed spectral data acquisition
with advanced features, such as time series analysis and episodic data
capture with rapid
sample logging are standard features. Post processing techniques such
as baseline correction, data smoothing, and
spectral derivatives are included. Additionally, add-on chemometrics
packages are available for complete multivariate calibration, analysis,
and run-time with the
DWARF-Star.
Introduction into Near-Infrared Spectroscopy
The near-infrared (NIR) region of
the spectrum extends from the upper wavelength end of the visible region
at about 770nm to about 2500nm (13,000 to 4,000cm-1.
StellarNet RED-Wave-NIR and NIRX-SR model spectrometers extend to 2300nm
capturing some of the most valuable absorption bands in the near
infrared. These bands are overtones or combinations of fundamental
stretching vibrational bands. The bonds involved are usually C-H,
N-H, and O-H. Because the bands are overtones or combinations
their molar absorptivities are low. Quantitative determination of
species, such as water, proteins, low molecular weight hydrocarbons, and
fats in product s of the agriculture, food, petroleum and chemical
industries. Both diffuse reflection and transmission measurements are
used, although diffuse reflection is by far the most widely used.
StellarNet offers TXF transmission fixtures and RFX reflection fixtures
to facilitate these measurements. To learn more about Near-Infrared
Absorption and Reflectance spectroscopy visit our
Applications page!!!
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