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Radiometry


Colorimetry Chemistry Optical Metrology Chemometry

 

SpectroChemistry

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Chemical Absorbance & more
 
  • UV-VIS & NIR systems for chemical absorbance measurements 190-2300nm

  • Spectrochemistry Systems include a miniature spectrometer, light source, and sampling accessory such as cuvette holders, dip probes, & flow cells

  • SpectraWiz Software has built in features for ChemWiz Concentration Analyzer with multivariate chemometric options

  • Episodic capture for kinetics, time series analysis, & batch monitoring

  • Easily convert to fluorescence or reflectance for multi applications

  • Great for Teaching Labs, Research, Process Control & much more!

  • Also see details about our Fluorescence and Raman Systems


Spectrometers for Chemistry Applications
StellarNet miniature research grade spectrometers allow 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® Software Suite. StellarNet Chemical Absorbance Systems reliably measure absorbance and concentrations and have applications in the food & beverage, petrochemical, pharmaceuticals, raw material industries.


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.
The BLACK-Comet series of concave grating spectrometers cover wavelength ranges 190-1100nm in four different configurations. The BLACK-Comet utilizes aberration corrected optics allowing for enhanced UV sensitivity, reduced stray light, uniform resolution, and superb spectral imaging.
The RED-Wave NIR InGaAs series spectrometers cover the near infrared 900-2300nminfrared 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.

StellarNet UV-VIS-NIR systems covers a 190-2300nm range with fiber optic light sources and accessories. Click on the tabs above for light source and sampling accessory options!


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SpectroFluorometer Overview

StellarNet’s line of research grade fluorescence systems are designed for a wide range of applications requiring eXtreme sensitivity. Choose from our research grade BLACK-Comet with concave grating optics or our high performance SILVER-Nova with Thermo Electric Cooling (TEC). Sample types include powders, liquids, films and surfaces and there are options for cuvette, probe, and/or flow cell accessories. As always, StellarNet instrumentation is built modularized, compact, and rugged for field, process, or lab environments.

The compact spectrometer is the main component of the system and is preconfigured with high throughput optics and a larger entrance slit, low noise circuit design, and an ultra-sensitive detector array for extreme low-light level detection from 200-1100nm.


SpectroFluorometer System consisting of High Sensitivity SILVER-Nova TE Cooled Spectrometer, CUV-F, and the SL1-LED excitation source
BLACK-Comet concave grating spectrometers have ultra low stray light and enhanced sensitivity due to their superior grating technology. As opposed to the industry standard Czerny Turner optical design used in most miniature spectrometers, which employ mirrors and a plane grating, the BLACK-Comet’s concave grating is the sole element in the optical grating design, thus reducing the amount of surfaces in the light path. Scattered light is thus drastically reduced to 0.02% at 435 nm and 0.2% at 200 nm. The BLACK-Comet grating has an f-number of f/2 which provides nearly 4-5 times the system light collecting ability compared to competing models with f-numbers of f/4 and f/5. Additionally, the aberration corrected grating provides broadband uniform resolution and excellent spectral shapes. BLACK-Comet TEC models with advanced cooling options are available since 2016.
StellarNet’s SILVER-Nova wide range spectrometer includes an integrated thermo electric cooler (TEC) added to the detector array to maintain -15 °C from ambient and achieve a +/-0.1 °C temperature stabilization increasing the S/N ratio by 60% at long exposure times, thus dramatically enhancing the instruments dynamic range. Also, the SILVER-Nova contains a large detector lens assembly increasing photon collection ability by 3-4x with 600 and 1000 micron diameter input fibers. These design optimizations make the SILVER-Nova TEC spectrometer one of the premier miniature spectrometers for low light detection.

StellarNet fluorescence systems are rugged and shock-proof with no moving parts and are suitable for field applications, factory and industrial conditions; even perfect for a standard laboratory benchtop!

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SpectroColorimeter Sample Spectra  
   

Spectrum of simulated chemical reaction using SpectraWiz software allows for time series analysis of batch titrations and in process monitor and control.

SpectraWiz software interface displaying raw NIR reflectance spectra of dietary supplement powders with inset multivariate calibration model
   

DWARF-Star NIR Spectrometer
SpectraWiz Software displaying a time series increase of NIR water absorption bands.


2nd Derivative data using SpectraWiz of various plastics, used for identification in recycling plants



SpectroFluorometer Sample Spectra  
   

Powder Lanthanide complex luminescence using BLACK-Comet spectrometer and R600-8-UVVIS-SR fluorescence probe with 7 optical fibers bundled around 1 600µm fiber. For fluorescence measurements the 7 exterior fibers are illuminated by a high output excitation source such as our SL1-LED and the interior fiber collects light emission and returns the signal to the spectrometer. Inline filters can be added to the system to remove excitation wavelength artifacts.

Fluorescence Spectra of Fluorite (blue), Wernerite (yellow), Calcite (pink), & Tremolite (orange) using a StellarNet preconfigured Fluorescence System