This flexible, near-infrared spectrometer accurately measures a wide variety of geologic samples offering better visibility into the ore sorting, processing and extraction processes. The rugged ASD TerraSpec mineral and ore analyzer transitions easily from the production lab to the field, where it can quickly and accurately analyze ore feeds and tailings.

  • Improved optics deliver more precise spectral data in a fraction of the time.
  • High-throughput sample analysis (capable of analyzing more than 1,000 samples a day) means accurate measurements even in high-volume production environments.
  • Upgraded feature recognition helps you analyze darker material and improve management of ore variability.
  • Industry leading performance in the SWIR 1/SWIR 2 regions for unparalleled alteration mineral analysis.

Designed to boost yield and reduce mineral processing costs in mining production environments, the ASD TerraSpec 4 Standard-Res mining analyzer supplies critical mineralogical and ore property information more quickly than other technologies. For example, the ASD TerraSpec spectrometer’s impressive spectral response produces high-quality spectra used to identify clay minerals such as kaolinite, dickite, smectite or montmorillinite in real time with no sample prep required.

The ASD TerraSpec 4 Standard-Res mining analyzer is ideal for a range of mining production measurement applications, including heap leach optimization, ore sorting, agglomeration optimization, and floatation ore feed control.

Pair the ASD TerraSpec 4 Standard-Res mineral analyzer with The Spectral Geologist (TSG) software from Spectral Geoscience ( to analyse the spectra and produce mineralogical output products.

Wavelenth Range350-2500 nm
Resolution3 nm @ 700 nm and 10 nm @ 1400/2100 nm
Scanning time100 milliseconds
Signal-to-noise ratioVNIR:  9,000:1 @ 700 nm
SWIR 1:  9,000:1 @ 1400 nm
SWIR 2:  4,000:1 @ 2100 nm
Photometric noiseVNIR:  48 μAU @ 700 nm
SWIR 1:  48 μAU @ 1400 nm
SWIR 2:  110 μAU @ 2100 nm
Stray lightVNIR:  5000:1 (0.02%)
NIR:  10,000:1 (0.01%)
Wavelength reproducibility 0.1 nm
Wavelength accuracy0.5 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
Certifications and ApprovalsCE certified:   EN61010-1:2001 2nd Edition
EU Directive:   2006/95/EC, 2004/108/EC
NIST traceable calibration
WEEE Compliance
CommunicationsWired:  10/100 Base T Ethernet port with Ethernet cross-over cable
Wireless:  802.11g/n wireless card
Dimensions(H x W x D) 12.7 x 36.8 x 29.2 cm (5 x 14.5 x 11.5 in)
Weight5.44 kg (12 lbs)
Battery weight1.2 kg (2.7 lbs)
Battery run timeApproximately 6 hours (without lamps or accessories)
Operating temperature0 to 40° C (32 to 104° F)
Storage temperature-15 to 45° C (5 to 113° F)
Input PowerAC/DC switching power supply and a sealed lead-acid gel cell battery
AC input90-240 VAC, 50/60 Hz
DC input12 VDC, 60 W
Auxiliary port powerOutput, +12 VDC, 27 Watt (max)
SoftwareIndico® Pro acquisition software, Compatibility with GRAMS, Seamless interface with ENVI®, ASD ViewSpec™ Pro for post processing, optional RS3™
PortabilityRugged instrument transportation case; optional customized backpack with soft-sided travel bag
WarrantyOne year full warranty including expert customer support
ComputerWindows® 7 64-bit laptop (instrument controller)

ASD TerraSpec 4 Standard-Res Mineral Analyzer

Probes and Lighting


The ASD Contact Probe is designed for contact measurements of solid raw materials such as minerals, grains, other granular materials. Its innovative optical design minimizes measurement errors associated with stray light and allows for measurement of samples through clear and transparent plastic bags.

In addition to the standard contact probe, ASD also offer the Hi-Brite contact probe and the Plant Probe.

All contact probes are available with a ruggedized cable feed and cable, designed for applications that involve extra cold or harsh temperatures. (see image below specifications)


Length10" ( 25.4 cm)
Weight1.5 lbs (.7 kg)
Power requirements12-18 VDC, 6.5 W
Lightsource type/Life (approx.)Halogen bulb/1500 hours
Halogen bulb color temperature2900 K
Spot size10 mm

The Fiber Optic Illuminator is a portable, external light source designed for use with ASD instruments and sampling accessories that do not have a built-in light source.

Technical Specifications

Length   11.43 cm (4.5 inches)
Width   8.255 cm (3.25 inches)
Weight   292 grams (10.3 ounces)

The ASD Muglight is designed for analysis of raw materials requiring reflectance and absorbance measurements. It can measure samples through glass vials, or using the ASD sampling tray adapter. It's unique and innovative design minimizes measurement errors associated with stray light and specular reflected components.

For users requiring higher intensity illumination, ASD also offers the Hi-Brite Muglight.

Muglight specifications:

Size5.5” x 3.7” (14cm x 9.4cm)
Weight2.91 lbs (1.3 kg)
Power requirementsInput power 5.5 W, bulb 4 W
Light source (type/life) approx.Tungsten Quartz Halogen b/1500rs
Bulb color temp2900 K
Spot size12 mm

The Rapid Analysis Probe is specifically designed for speedy spectral collection of powders and other fine-grained materials such as small uniform seeds and grains. Its beveled tip and metal jacket greatly speed up the spectral collection process of fine grained materials to optimize workflow. Simply insert the Rapid Analysis Probe into your fine-grained media, collect the spectrum, use a chemical wipe to swipe the probe clean and move on to the next sample. It’s that easy! The Rapid Analysis Probe comes with a gimbaled white reference for high performance calibration. It can be used for quantitative predictive models.

If using this probe with a spectrometer such as a TerraSpec mineral analyzer or a LabSpec lab analyzer without an integrated light source, a Fiber Optic Illuminator is necessary. The Fiber Optic Illuminator provides the light source needed for sample collection.

Technical Specifications

Length: 21.6 cm (8.5 inches)
Spot size: 4 mm


With an approximate spot size of only 2 mm, the Small Diameter Reflectance Probe was designed to collect spectra from individual small materials such as individual grains or vugs in a hand sample or rock core. It’s perfect for determining specific mineralogy of individual grains.

If using a spectrometer such as a TerraSpec mineral analyzer or a LabSpec lab analyzer without an integrated light source, a Fiber Optic Illuminator is required. The Fiber Optic Illuminator provides the necessary light source for sample collection.

Technical Specifications

Length: 10.2 cm (4 inches)
Field of View: 1 mm


When your application requires analysis of irregularly shaped or non-homogeneous samples, the ASD Turntable is ideal for obtaining a highly accurate average. Especially useful for instrument owners in the grain, agriculture, pulp and paper, food, plastics and mining industries.

The Turntable offers:

  • 53.2 mm sampling spot size
  • Rotates at 22 RPM
  • Fits up to a 150mm sample dish
  • Compact (8"x11"x11" or 20.32 cm x 27.94 cm x 27.94 cm) footprint.

The Turntable comes standard with a 4000 hour halogen light source and one standard 150 mm x 15 mm Petri dish.

Reference Panels


ASD carries a wide array of calibrated and non-calibrated diffuse white and gray reference panels in varying sizes (from 2 x 2 in. to 12 x 12 in. or 5.1 x 5.1 cm to 30.5 cm x 30.5 cm) and reflectance levels, including encapsulated gray scale (NIST/NRC traceable) wavelength and USP standards for USP 1119. Calibrated panels come with certificate and documentation showing standard deviation and reflectance factors.

All reference panels and standards may be purchased separately. To provide our customers with a more cost-effective approach, specific sizes or styles of reference panels are included in accessory bundles designed for maximum compatibility with a particular application.

Your ASD sales representative will be able to advise you on the best option(s) for your needs.

General Accessories

The ASD Ergonomic Pro-Pack Backpack takes field portability to a higher level for FieldSpec®, LabSpec®, and TerraSpec® customers requiring the ultimate in portability.

Constructed of ultra-tough but lightweight material, the Ergonomic Pro-Pack Backpack weighs only 5.5 pounds (2.49 kg). The Pro-Pack Backpack positions the center of mass much closer to the body, and the easily adjustable ‘one size fits all' frame accommodates all body types for superior ergonomics.

Additionally, the Pro-Pack comes standard with:

  • ‘Pull-out' waterproof rain hood built in
  • Snap-on spool holder for protective storage of the fiber optic cable
  • Larger storage pockets to hold the notebook controller and accessories
  • Soft-sided travel case for backpack to aid in easy travel.