The Terraspec 4 Hi-Res from Malvern Panalytical is a VIS/NIR Portable Spectrometer that operates at a wavelength of 350 nm - 2500 nm. It has a spectral resolution of 3 nm (at 700 nm) and 6 nm (at 1400/2100 nm). This spectrometer has a wavelength accuracy of 0.5 nm, wavelength reproducibility of 0.1 nm and requires a scanning time of 100 milliseconds. It has a photometric noise of 48 µAU in the VNIR (at 700 nm) & SWIR 1 (at 1400 nm) regions and 110 µAU in the SWIR 2 (at 2100 nm) region. This spectrometer has 2151 channels with a 512 element NIR-enhanced silicon array VNIR detector and (1001-1800 nm) & (1801-2500 nm) Graded Index InGaAs Photodiode, two-stage TE Cooled SWIR 1 & 2 detectors. It can be connected either using 10/100 Base T Ethernet port with Ethernet cross-over cable or an 802.11g/n wireless card.

The Terraspec 4 Hi-Res features the de facto technology for measuring the spectral reflectance of minerals. This spectrometer can have additional accessories like Hi-Brite Contact Probe, Hi-Brite Mug Light, rapid analysis probe, small diameter reflectance probe and a specially designed backpack for increased portability. It has RS3 spectral acquisition software, compatibility with The Spectral Geologist and SpecMin, seamless interface with ENVI®, ASD ViewSpec Pro for post processing and Indico® Pro spectral acquisition software. This spectrometer requires a DC supply of 12 V or an AC supply of 90 – 240 V and consumes 60 W of power. It is available in a portable handheld package that measures 12.7 x 36.8 x 29.2 cm and is ideal for mineral exploration, deposit mapping, mineral assemblage identification, drill cuttings analysis, core logging, determining geochemical gradients, clay species delineation and faster vectoring to ore body applications.