The TRS38G probe provides long-spaced (LSD) and high-resolution (HRD) 4π global density measurements, based on the Compton scattering principle, as well as a natural gamma log.

This probe is intended for use in open and cased-hole conditions where a focussed sidewall density probe can not be deployed, or where calibrated results in g/cm3 are not necessary. It is widely used in the geotechnical sector where boreholes are drilled for reconnaissance, diagnostic or remedial works.

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TRS38G specifications

  • Diameter : 38 mm
  • Length : 2330 mm
  • Weight : 12 Kg (include source holder)
  • Max. Temp : 70°C
  • Max. Pressure : 200 bar

  • Density/nat. gamma detectors : ø25 x 50 mm NaI(Tl) crystal
  • Source – detector spacings : 24 cm (HRD), 48 cm (LSD)
  • Source type : Cs-137 ( energy 660 keV)
  • Recommended source activity : 3.7 GBq (100 mCi)

  • Source holder
  • Source transport container

  • Dry or fluid-filled borehole
  • Open or cased borehole

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