SECTEURS
GÉOTECHNIQUE
New ! 6G is arriving
New ! 6G is arriving
NOS CLIENTS
GRS42 & 60: Spectral Gamma
The detector assembly comprises of a 25 x 50 mm (GRS42) or 50 x 150 mm (GRS60) cylindrical NaI crystal coupled to a thermally stabilised photomultiplier tube.
According to type the probe is capable of resolving 250 or 500 discrete gamma ray energy levels over the range 60 to 3 060 keV. Count rates from all of which are transmitted to the surface during logging.
Subsequently, discrete windows centred on the characteristic K, U and Th peak levels are used to derive the concentration of these radio-elements.
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GRS42 SPECIFICATIONS
Technical Specifications
✓ Diameter GRS 42 : 42 mm
✓ GRS 60 : 60 mm
✓ Length : 1120 mm
✓ Weight : 7 Kg
✓ T° Max. : 70°C
✓ Pressure Max : 200 bar
Sensors Parameters
✓ Detector GRS 42 : 25 x 50 mm
✓ Detector GRS 60 : 50 x 150 mm
✓ Spectral energy range : 60 to 3060 keV
✓ Spectral resolution : GRS 42 : 250 channels, 12 keV per channel
✓ Spectral resolution : GRS 60 : 500 channels, 6 keV per channel
Borehole Conditions
✓ Dry or fluidfilled
✓ Open-hole or through steel or PVC casing 75mm minimum