Density Gamma Probe HDG-453
The probe provides relative measurement of the bulk density of formations surrounding the barehole with very good bed boundary resolution.
The probe contains a gamma source and a high sensitivity gamma scintillation detector that is shilded against direct radiatio from source. Therefore only the radiation backscattered from the formation reaches the detector.
The relative count-rates provide a measure of formation bulk density.

Probe Parameters
Diameter | 45 mm |
Lenght | 130 cm |
Weight | 7.7 kg |
Detector type | NaI(Tl) |
Detector size | Ø16 × 10 mm |
Measuring range | 1 – 4 g/ccm |
Max. Working Temperature/Presure | 70°C/15 MPa |
Min. No. of Cable Conductors | 2 |
Supply Voltage Range | 30 – 45 VDC |
Max./Nominal Curent Consumption | 100/70 mADC |
Supply Voltage Polarity | + on central cond. |
− on probe casing | |
Either Co 60 or Cs 137 can be used as source. |
Special orders
Probe of 38 mm diameter can also be manufactured uponspecial request. Its measuring parameters are similar to those stated above.