Geophex Ltd.
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GEM-3 Array

The GEM-3 configuration can be built as a GEM-3 array. The GEM-3 Array is a flat panel with a large transmitter coil along its perimeter and 3 , 5 or 7 equally-spaced receiver coils along its center line. This configuration provides the best of both worlds: a wide swath for fast area coverage, with the resolution of a smaller receive coils.

The GEM-3 array can be mounted to a cart for towing by a small ATV. It can also be mounted on a sled, mounted directly to a vehicle or used in stationary applications.

The system can provide a real time map showing potential targets on the screen. The unit comes with a GPS unit at decimeter accuracy. The system can merge data from other sensors and devices on the same platform using standard serial communication lines.

The array has the following advantages:
Maximum possible transmitter moment for a given array size
Broadband operation, typically 10 frequencies between 30Hz to 93kHz
Multiple receiver channels operating simultaneously;
High-speed survey with high data density
Easy shipping owing to its flat construction


The GEM-3 array is suitable for investigations in:

  • Shallow geology
  • Geotechnical Engineering
  • Soil Science
  • Archaeology
  • Environmental Contaminations
  • Underground facilities
  • Continuous EMI Spectrum
  • Location of unexploded ordnance (UXO)
  • Finding buried utilities,
  • Mapping shallow geology
  • Detecting and characterizing landmines and IEDs in hostile environments
  • Single-pass detection of underground pipes or other linear features

Contact Geophex for more information
For an explanation of the GEM-2, GEM-3 and GEM-5 configurations, see the document Sensor Configurations

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Geophex Ltd.      605 Mercury street, Raleigh NC 27603 U.S.A.       Fax: +1 (919) 230-9900       Telephone: +1 (919) 839-8515