OreXpress Field Portable Spectrometer

For Mineral Identification and Analysis

SPECTRAL EVOLUTION OreXpress Spectrometers are ideally suited for mining exploration, mineral identification, and mining production. These spectrometers cover the UV/VIS/NIR spectra using three photodiode arrays with no moving parts.

Advantages of OreXpress Field Portable Spectrometer

  • High signal-to-noise ratio for better reflectance values.
  • Fast start-up and use, with no optimization step required to start scanning or between scans.
  • Collect target data with a single click.
  • Mineral identification capabilities are built-in – use our EZ-ID software, compare scans versus existing libraries such as SpecMIN and USGS, or compare against your own custom libraries.
  • Our library builder allows you to quickly build new libraries and add to existing libraries.
  • Rugged handheld GETAC PS336 handheld microcomputer with a sunlight readable display includes an auto-focus digital camera, e-compass, altimeter, GPS and voice notes, as well as the ability to tag scans with pictures, notes GPS, etc.
  • Ergonomic mineral contact probe and rugged metal clad fiber cable.
  • Lightweight lithium-ion battery for power in the field.


Spectral Range350 – 2500 nm
Spectral Resolution3 nm ( 350 - 1000 nm )
8nm @ 1500nm
6nm @2100nm
Spectral Sampling BandwidthData output reported in 1 nm incre- ments; 2151 channel reported
Si Detectors512 element Si array ( 350 – 1000 nm )
InGaAs Detectors256 element extended wavelength array ( 970 – 1910 nm )
256 element extended wavelength array ( 1900 - 2500 nm )
FOV OptionsFiber mount only 1,2,3,4,5,8,10°
Stray light0.10%
Minimum Scan Speed100 milliseconds
Wavelength Reproducibility0.1 nm
Wavelength Accuracy±0.5 bandwidth
Communications InterfaceUSB, Bluetooth
Size8.5” x 12” x 3.5”
Weight7.3 lbs
BatteryExternal Lithium ion; 7.4V
Battery OperationMinimum 2 hour operation

Applications of OreXpress Spectrometer

Geologists and exploration managers can identify minerals associated with gold, silver, iron, copper, diamonds, aluminum, uranium, and more across a range of deposit types, including epithermals, porphyries, kimberlites, carbonate hosted base metals, shear veins, skarns, and disseminated gold systems.