Lippmann Geophysical Instruments (LGM)

- Model 10W - 4 Point Light Earth Resistivity Meter

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Our high resolution earth resistivity meter 4point light 10W provides quantitative information about induced polarity (IP) of the soil. It measures the phase shift between the current injected into the ground and the voltage seen at the potential electrodes. It has adequate power to drive Schlumberger soundings up to L/2 = 1000 m.

  • Size :  25 x 12 x 5 cm
  • Weight : 750 g (including batteries)**
  • Frequency : 0.26 Hz ... 30 Hz
  • Output current : 1 μA ... 100 mA
  • Output voltage : 380 V p-p
  • Resolution receiver : 100 nV
  • Phase resolution : up to 0.05 mRad
  • AD-converter : 24 Bit
  • Display : 4 x 20 digit LCD
  • In-Phase/Out-of-Phase-Display
  • Accuracy : 0.2 %
  • Velocity : 1 sec / measured value

**Comparable competing products weigh between 4 and 7 kg!!

  • Stacking of measurement values for improved signal-to-noise ratio
  • Determination of the statistical measurement errors
  • Direct calculation of rho-s for Wenner, Schlumberger, Schlumberger/2, Pole-Pole, Dipole-Dipole
  • Fast mapping function for archeological measurements (like GeoScan RM4/RM15)
  • Memory for more than 300.000 measured values
  • Full remote control
  • Galvanically isolated interface
  • Power supply by rechargeable standard NiMH batteries
  • Quick charge of internal batteries (3 h)
  • Various automatic functions for mapping and sounding
  • Automatic trigger for mapping
  • Determination of frequency dependence of resistivity
  • Spectral IP
  • Complete calibration possible at an internal reference resistor
  • Interface for active electrodes
  • Autonomous tomography mode
  • Measurements at regular intervals in monitoring mode
  • Connection for a mobile radio modem (GPRS)

  • Groundwater prospecting
  • Mining
  • Environment
  • Induced polarization
  • Near surface geophysics
  • Lab measurements
  • Examination of building materials
  • Archeology

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