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RED-Wave-NIRX-SR EXtended Range NIR Spectrometer

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eXtended Range NIR Spectrometer
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  • Measurements from 900-2300nm (0.90-2.30 um)
  • For NIR measurements and applications requiring wide spectral range
  • 512 or 1024 pixel extended range InGaAs Photo Diode Array
  • Integrated 2-stage thermo electric cooler set to operate at -30 °C
  • Increased air flow and specialized heat sink for added stability
  • Applications include absorption, transmission, and laser measurement.

Sample Spectra SpectraWiz Software Spectragryph Software Popular Accessories

StellarNet’s high performance RED-Wave-NIRX-SR Spectrometers cover the NIR wavelength range from 900-2200µm in one unit. The spectrometers are exceptionally robust with no moving parts and are packaged in small rugged metal enclosure (2.75” x 4” x 6”) for portable, processes, and lab applications. The InGaAs detector is a Sensors Unlimited linear photo diode array with 512 pixels (1024 optional), 25µm by 250µm tall to provide best signal performance. The detector has an integrated two-stage thermo electric cooler (TEC) maintained at –20 °C, stabilized within +/-0.1°C. The RED-Wave-NIRX-SR-InGaAs spectrometers use single strand SMA 905 fiber optic input.

Ruggedized – The detachable spectrograph assembly and control electronics are protected inside a rugged metal enclosure, suitable for portable, process, lab, and field applications.

Onboard Memory with pre-set calibrations, spectrometer settings, and snap shot memory to provide an instantaneous spectral image from the InGaAs array.

High Speed Electronic Interface can be attached directly to a computers USB port for high speed data transfer. Options for Wifi/ethernet communication available as well as other interfaces.

NIR Applications include chemical absorption, moisture analysis, transmission of filter and optical components, and high power radiometric measurements such as laser characterization.


Number of Elements
Wavelength Range (nm)
Spectral Range
spectral resolution
900 - 2300
1400 nm
<13 nm
900 - 2300
1400 nm
<7 nm


Zero defect 512 detector RED-Wave-NIRX-SR Spectrometer $18,995 / €15995
Dynamic range: 4000:1 with 5 decades Dimensions: 150 x 100 x 68.8 mm
Optical resolution: 13 nm with 25µm slit Power consumption: 2 A @ 5 VDC
Detector type: cooled InGaAs PDA, 512 or 1024 pixels Interface: USB-2 and Parallel
Detector range: 0.9 - 2.3 µm (900-2300nm) Detector Integration: 1ms to 250ms
Pixel size: 25 x 500 µm Slit size options: 25 µm for optimum performance
Pixel Well Depth: 130 x 108 electrons Operating systems: Win XP, Vista, 7, 8, & 10
Selectable Well control: 130 x 108 or 5 x 106 electrons Software included: SpectraWiz program & apps
Signal to Noise: 12000:1 with 2X TEC cooling Also free programs for: LabView, Excel+VBA, Delphi
Digitizer: 16-bit    
RED-Wave-NIRX-SR Sample Spectra  

RED-Wave-NIRX-SR InGaAs 512 pixels spectrum showing spectral characteristics of Tylenol, Excedrin PM, and Ibuprofen tablets. Often NIR spectroscopy is used as a non-contact method to distinguish between coatings.

RED-Wave-NIRX-SR spectrometer with SL1-CUV tungsten halogen lamp with integrated cuvette holder, and a F1000-VIS-NIR 1000um diameter fiber optic cable measuring the NIR absorption of methanol in water.

RED-Wave-NIRX-SR spectrometer with SL1 tungsten halogen lamp, TXF-4 transmission fixture, and two F600-VIS-NIR 600um diameter fiber optic cables measuring the transmission through PTFE and Lexan plastics. Above SpectraWiz spectroscopy software displays 2nd derivative spectra in real time.

RED-Wave-NIRX-SR spectrometer with SL1-CUV tungsten halogen lamp with integrated cuvette holder, and a F600-VIS-NIR 600um diameter fiber optic cable measuring the NIR absorption of oil and alcohol solutions.


RED-Wave-NIRX-SR spectrometer with RFX1 reflectance fixture plotting NIR 2nd derivative spectra of soy products with varying fat content.

Lens, filters, films, coatings, and plastics sometimes will have interesting characteristic fringe patterns in the far NIR. Be sure to test your samples!

Fats and oils constitute the main source of energy and essential fatty acids in the human diet. Additionally, fats and oils function as lubricants in equipment and carriers of fat-soluble vitamins and pigments. Exploring the NIR past 1700nm allows us to identify some of the more important spectral feastures of fats and oils. Above is a spectrum of the StellarNet low dark Noise NIRX (900-2300nm) showing important spectral features past 1700nm such as Fatty Acids absorbance bands at 1750nm and oil saturation absorbance at 2100nm.

Coffee in addition to many other agricultural products shows very important spectral characteristics past 1700nm. Commercial coffee is mainly made up of two main blends, Arabica and Robusta. Main distinguishing absorptions can be found from water content (1466nm and 1962nm) and lipids. NIR spectroscopy can be used for classification as well as blending. Also, caffeine and dry matter content can be determined. For food quality control and identification of adulterants it is very important to test all parts of the NIR region.

RED-Wave-NIRX-SR Options

Dual System Configurations
All NIRX-SR units can be coupled with StellarNet’s BLACK-Comet or UVN-SR units to cover the entire 200-2300nm range. Coupling the units can provide you with quick analysis of color in the visible spectrum and additionally compound analysis though compound fingerprint identification in the near infrared spectrum.

JACK 1-IN Trigger
Add an external TTL trigger input to enable spectrometer scan

Multi-Spectrometer Configurations
Units may be daisy chained via USB-2 hub allowing simple configurations for dual and multi-beam process applications. 8 spectrometers can be operated at once!

RED-Wave-NIRX-SR Interfaces

The system includes a high speed plug & play interface using USB-2 connection.

Systems / Applications

NIR Applications include chemical absorption, moisture analysis, transmission of filter and optical components, and high power radiometric measurements such as laser characterization.

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