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The ASD TerraSpec line of mineral analyzers provide portable, rapid and non-destructive analysis of minerals in the lab or the field. Exploration geologists appreciate the ASD TerraSpec mineral analyzer’s portability and ability to rapidly identify key minerals. When used as an ore analyzer, results are presented in seconds to speed ore processing decisions.

Technical Spcifications

Model Halo Mineral Identifier 4 Hi-Res Mineral Spectrometer
Spectral range (Wavelength range) 350-2500 nm 350-2500 nm
Spectral resolution 3 nm @ 700 nm, 9.8 nm @ 1400 nm, 8.1 nm @ 2100 nm 3 nm @ 700 nm, 6 nm @ 1400/2100 nm
Dimensions (H x W x D) 31 x 10 x 30 cm (12.3 x 4.0 x 11.7 in) 12.7 x 36.8 x 29.2 cm (5 x 14.5 x 11.5 in)
Weight With battery: 2.5 kg/5.5 lbs
Without battery: 2.0 kg/4.3 lbs
5.44 kg (12 lbs)
Wavelength 350nm - 2500nm 350nm - 2500nm

Available models

Portable full-range handheld spectrometer that is fast, accurate, and easy to use for the exploration geology market

For exploration and mine geologists, the ASD TerraSpec Halo mineral identifier is the next generation all-in-one mineral identifier / analysis system that allows you to immediately identify alteration minerals with a simple pull of a trigger for faster delineation of alteration, speedier core logging and quick confirmation of ore mineralogy.

The ASD TerraSpec Halo mineral identifier is a full-range VIS-NIR-SWIR spectrometer measuring the visible, near-infrared and short-wave infrared regions (350-2500 nm) that produces immediate on-instrument results using a non-destructive contact measurement. The instrument includes internal references to allow for easy operation and data management and also features proprietary, state-of-the-art mineral identification software for fast data capture in the field, and easy data management back in the lab or core shack. 

Scanning time
100 milliseconds
Signal-to-noise ratio
VNIR: 9,000:1 @ 700 nm | SWIR 1: 9,000:1 @ 1400 nm | SWIR 2: 4,000:1 @ 2100 nm
VNIR detector
(350-1000 nm) 512 element silicon array
SWIR 1 & 2 detectors
(1001-1800 nm) & (1801-2500 nm) Graded Index InGaAs Photodiode, TE Cooled
Operating temperature
0 to 40° C (32 to 104° F)
Storage temperature
-15 to 45° C (5 to 113° F)
Input power
AC/DC switching power supply and a sealed lead-acid gel cell battery
AC input
90-240 VAC, 50/60 Hz
DC input
12 VDC, 60 W

Fast, precise mineral exploration

Recognized as the de facto technology for mineralogical analysis, the rugged portable ASD TerraSpec mineral spectrometers are trusted by top geologists for performing fast, precise pathfinder mineral identification for identification of exploration targets. The ASD TerraSpec 4 Hi-Res mineral analyzer brings new levels of efficacy to mineral exploration technology. This state-of-the-art mineral spectrometer offers enhanced performance in the SWIR 1 and 2 regions and a 6 nm resolution to help you determine the viability of mineral exploration targets faster and more precisely than ever before. These enhancements provide you with the ability to capture accurate spectral data more quickly, especially for samples with darker mineral features.

Key Features

  • Handheld: Lightweight design and ruggedness allow for unprecedented portability. The fully integrated, full-range spectrometer with on-board mineral identification software eliminates the need for cumbersome cables or third-party devices. 
  • Fast and accurate: Powerful on-board software allows for mineral results in seconds, including confidence rating and spectral scalars that give you even more information about your deposit. 
  • No cables: Don’t get tangled up in fragile cables from your spectrometer to your contact probe. And don’t worry about putting down your third-party PDA and losing it. The TerraSpec Halo is an all-in-one device – one hand, one click. 
  • Simple mineral data capture and handling: Data can be automatically saved on the instrument and later exported to any Windows computer. Use the intuitive Halo manager software for easy file naming, clear graphical spectrum and results review, and unprecedented spectrum management and export tools. 
  • No more lost notes or locations: GPS and voice memo features allow you to geotag and record audio notes with every measurement. 
  • Immediate multi-mineral results and scalars: TerraSpec Halo doesn’t give you just one mineral prediction. It gives you multi-mineral predictions, confidence levels and spectral scalars that allow you to monitor crystallinity changes, subtle shifts in alteration patterns and compositional changes associated within geochemical gradients. 
  • Extensive spectral library: Comprehensive multi-continent, ever-expanding mineral spectral library; utilize the USGS library or customize your own! 
  • User-friendly features: Highly portable, the TerraSpec Halo is designed with audio and visual tools for easy operation, fast data collection and superb workflow. With a few clicks, optimize performance for both light or dark rocks. 
  • No third-party hardware: Everything you need for the field is on the device. Download your spectral data from the TerraSpec Halo to your own laptop where you can export the data to The Spectral Geologist (TSG®), Leapfrog or other third-party software tools of your choice. 
  • Spectrum management: Review spectra on the device or on your laptop. Laptop software allows for easy spectrum management with user-friendly file naming, spectrum review and tagging, and easy import/export capability. 
  • Enhanced optical configuration provides more precise spectral results for superior spectrum clarity and definition.
  • Industry leading performance in the SWIR 1/SWIR 2 regions for unparalleled alteration mineral identification.
  • Standard ruggedized steel covered fiber optic cable ensures consistent spectral quality.
  • No need for sample prep, which means fast field scans.

Unpacking the TerraSpec

  • Agriculture
  • Education & Academics
  • Environmental
  • Food & Beverage
  • Mining & Minerals
  • Oil & Gas
  • Pharmaceutical
ASDASD Inc., a Malvern PANalytical company, is the global leader in high-performance analytical instrumentation solutions, solving some of the most challenging real-world materials measurement problems. ASD spectrometers — unparalleled in providing laboratory-grade results in the field or on-site — are the instruments of choice for remote sensing, environmental sciences, agricultural, mining, pharmaceutical and pulp and paper industry applications, where results drive paradigm-changing insights, efficiency and profit.
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