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DWARF-Star Miniature NIR Spectrometer


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NIR Spectrometer Features   Onlineshop

  • NIR Measurements in the 900-1700nm range
  • Spectral resolution down to 1nm for certain models
  • Miniature size 5x3x2″ with rugged, compact design
  • Integrated thermo electric cooler set to operate at -15 deg C
  • Complete Software Development and Integrated Chemometrics options
  • For NIR portable and OEM applications

Range 900-1700nm
DWARF-Star in handStellarNet’s most popular 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. The InGaAs detector is a Sensors Unlimited linear photo diode array with 512 pixels (1024 optional) 25μm by 500μm tall to provide maximum sensitivity. The detector has an integrated thermo electric cooler (TEC) maintained at –10 °C, stabilized within +/-0.1 °C. The NIR spectrometers accept a single strand SMA-905 terminated, low OH, fiber optic cable as input. Several models provide a variety of operational ranges and resolutions suitable for both spectroscopy and optical spectrum analysis.

StellarNet also offers light sources, probes, and sampling accessories to facilitate virtually any NIR application. The miniature DWARF-Star NIR spectrometer is ideal for process analytical technology for industries such as food and drug, chemical, oil and gas, and plastics. The DWARF-Star’s miniature size, low cost, and rugged design also make it ideal for the field, enabling on-site product analysis and quality control never before attainable.

Number of Elements Spectrometer   Range (nm) Grating      (g/mm) Grating Range (nm) Dispersion (nm/pixel) Estimated Resolving Resolution
NIR 512 900-1700 250 800nm 1.25 2.50nm
NIRb 512 1000-1700 300 650nm 1.00 2.00nm
NIR2 512 1250-1575 600 325nm 0.50 1.00nm
NIR2b 512 1150-1475 600 325nm 0.50 1.00nm
NIR 1024 1000-1700 600 700nm 0.62 1.25nm


Specifications                       DWARF-Star NIR Spectrometer   $13,125                     OEM Pricing available
Dynamic range:                    4000:1 with 5 decades Dimensions:                            5″x3″x2″
Resolving resolution:            2.5nm with 25μm slit Power consumption:               1.5 Amps @ 5 VDC
InGaAs Detector:                 512 or 1024 pixels Interface:                                USB-2
Detector range:                   900-1700nm Data transfer speed:               40x faster than USB-1
Pixel size:                            25um x 500um Detector Integration:               1 millisecond to 60 secs
Pixel well depth:                 130 x108 electrons Slit size options:                      25μm
Selectable well control:       130 x108  or  5 x106 el. Operating systems:                 Win XP, Vista, 7, 8, & 10
Signal to noise:                   4000:1 with TEC cooling Software included:                  SpectraWiz programs & Apps
Digitizer:                             16-bit Also free programs for:           LabView, Excel+VBA, Delphi
The SpectraWiz software is included to accurately measure wavelength emissions, reflectance, transmission, absorption, concentrations, and absolute intensities.

DWARF-Star Sample Spectra

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

Spectrum from DWARF-Star-512 showing 2nd Derivative spectral reflectance of type-2 plastics

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

softwareThe powerful SpectraWiz® spectrometer software is provided free of charge with every spectrometer instrument. This includes drivers and customizable software for Windows. The SpectraWiz software is considered the “Swiss Army Knife of Spectroscopy” and may be used to accurately measure wavelength emissions, reflectance, transmission, absorption, concentrations, and absolute intensities. In addition to real-time spectroscopy, SpectraWiz® has built-in applications for SpectroRadiometry, SpectroColorimetry, ChemWiz chemistry lab concentration analyzer, and UV level monitors.

Download SpectraWiz Software FREE


Interfaceusb 2.0
The system includes a high speed plug & play interface using USB-2 connection.

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