ELG48 / ELG48G

This probe represents the latest generation of fully digital, high precision electric logging probes. As standard, the ELG48 probe provides long (64») and short (16») normal resistivity, single-point resistance (SPR) and self-potential (SP) data. As an option, the probe can be supplied with a natural gamma detector to provide additional lithological information or for horizon correlation purposes. Widely employed in the domain of groundwater resources exploration and evaluation, the probe is suitable for use in formations having resistivities comprised between 10 and 25 000 Ω·m.

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ELG48 specifications

  • Diameter : 48 mm
  • Power supply : 70 to 100 VDC
  • Max. Temp / Pressure : 70°C / 200 bar

  • Resistivity injection signal : 200 Hz sine wave with ALC
  • Resistivity measuring range : 0 to 25 kΩ·m (16-bit)
  • Resistivity resolution : 0.4 Ω·m
  • SP measuring range : ± 1 500 mV
  • SP resolution : 0.05 mV

  • Gamma ray sensor: ø25 x 50 mm NaI(Tl) crystal
  • Calibration box

  • Fluid-filled
  • open borehole

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