Products

Borehole Logging Systems

Induction Conductivity

H3I-453
H4I-453
HI-381
HI-453, HI-453E
HI-453F
HII-383
HII-453

Magnetic Susceptibility

HM-453, HM-383, HM-320
HM-453E, HM-383E
HM-100
HMM-453
HMG-453

Combined probes

HMI-453, HMI-453E

Other probes

HC-380
HC-380C
HC-453, HC-453a
HC-454
HRT-381
HF-380
HGSPR-380
HF-500
HN-453
HFN-381
HGG-453
HDG-453
HLG-382

Other products

BHC-200
Geo set HDS-600
Portable Winches
Portable Logging System
Cameras

Accessories

AH-30, AH-150

Logging instruments

Natural Gamma, Self Potential and Single-point Resistance Probe HGSPR-380

It is a combined probe for measuring GR Gamma Ray, SP Self Potential and SPR Single-point Resistance.

After installing the probe into the logging system by connecting the cable head measuring of the SP parameters is activated. SP method is measured first, when winching the probe down. Voltage is measured against a grounding rod on the surface. After reaching the lowest point, increasing the power supply by about 5 V DC for 5 sec will switch the measurement to SPR + GR method, which is activated during pulling the probe upwards. Speed of the movement should be low, due to the GR method.
Used crystal is Nal, diameter 24 mm, length 45 up to 65 mm.

Natural Gamma, Self Potential and Single-point Resistance Probe HGSPR-380

Probe Parameters

Diameter 38 mm
Length 1200 mm
Weight 7.0 kg
Max. Working Temperature/Pressure 75°C/10 MPa
Power Supply 30 up to 45 VDC @ 120 mA

Measuring Ranges

SP Method −2.5 VDC up to +2.5 VDC
SPR Method 1 up to 2000 Ω
GR Method 60 keV up to 3 MeV

Output Signals

Frequency of positive and negative pulses (amplitude and width is adjustable) or Voltage 0 to +5 VDC

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