The GT-40 gamma ray spectrometer that can be used for field surveys and laboratory measurements. It has a high sensitivity and is easy to use. The integrated GPS allows to make quick map of the surveyed area.

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Technical specifications

Detectors: GT-40: NaI(Tl 76 x 76 mm, 345 cm³, with bi-alkali PMT.
GT-40: S BGO or NaI, 51 x 51 mm, 104 cm³,with bi-alkali PMT, Shielded with 25 mm lead.
Memory: Minimum of 2000 survey stations with full 1024 channel spectrum, position and voice recording.
Control: 5 button control
Data Input/Output: USB and Bluetooth.
Power Supply: Rechargeable Li-Ion rechargeable battery For up to 10hours operation.
Operating Temperature: -10 °C to +50 °C
Internal GPS Accuracy: 2.0m
Internal GPS Receiver Satellite Accessibility: SBAS (WAAS, EGNOS, MSAS)


  • Exploration for Uranium, Thorium and other associated REEs.
  • Geophysical Research.
  • Geological Mapping.
  • Baseline surveying.
  • Core logging.
  • Classification of building material.
  • Radon risk assessment.
  • Environmental monitoring.
  • Surface Contamination surveys.
  • Monitoring waste disposal sites