Natural Gamma Sonde

The Geovista digital Natural Gamma Ray Sonde can be used on its own or in combination with other Geovista sondes for correlation purposes. 
The spectral gamma version can operate in both spectral and 5 windows mode

Specifications:
Gross gamma Sonde Spectral Gamma Sonde
Weight: 3.5kg 6kg
Length / Diam.: 0.7m / 38mm or 28mm 0.8m / 50mm 
Detector (NaI) : 50mm x 25mm (38mm sonde) 150mm x 38 mm 
Max. Press. /Temp. 20MPa / 80ºC 20MPa / 80ºC
No. of Channels 256 
Energy Range 100keV to 2.8MeV
Resolution 10% @ 137Cs
Max. Pressure: 20MPa
Max. Temp.: 80ºC

Caliper Sonde
The GeoVista Two-Arm caliper probe can be used on its own, in combination with other GeoVista sondes, or with a second caliper sonde to provide a low cost Four-Arm caliper for borehole geometry evaluation.

Alternatively a single Four-Arm caliper with independent arms is available for larger boreholes.

Specifications:
2-Arm 4-Arm
Weight: 5.5 kg 18.0kg
Length: 1.15m 1.18m
Diameter: 38mm 80mm
Accuracy: ±5mm ±5mm
Max. Pressure: 20MPa -
Max. Temp.: 80ºC -
Range 45 – 600 mm 85 to 1000mm