GDD Instrumentation

The highly sensitive GDD IP Receiver models GRx8-32 is a compact unit designed for high productivity resistivity and time-domain induced polarization (IP) surveys in mineral exploration, groundwater exploration, geotechnical investigations and other related fields.

It features high capabilities allowing it to work in any field conditions. It can be configured for multi-pole or multi-dipole reception. The receiver uses a PDA handheld PC to process data acquisition and the software can easily be updated via internet.


  • Number of Channels: 8, 16, 24 or 32
  • Survey Capabilities: Resistivity and Time Domain IP
  • Twenty Chargeability Windows: Arithmetic, Logarithmic, Semi-logarithmic, Cole-cole, IPR-12 and user defined
  • Synchronization: Automatic and re-synchronization process on primary voltage signals
  • Noise Reduction: Automatic stacking number
  • Computation: Apparent resistivity, chargeability, standard deviation, and % of symmetrical VP
  • Serial Ports: RS-232 port and Bluetooth to communicate with a PDA
  • Operating Temperature: -45˚C to +60˚C (-49˚F to +140˚F)
  • Humidity Range: Waterproof
  • Allegro CX Mobile PDA: Standard Juniper Mobile PDA computer provided with the GDD receiver with all accessories
  • Operating System: Windows CE comes with Bluetooth and RS-232
  • Processor: Intel X scale 400 Mhz
  • Memory: 64 Mb or 128 Mb flash, 64 Mb RAM
  • Display: 7.2” (183 mm) VGA STN transflective color LCD with backlighting
  • PDA Temperature Range: -20˚C to +50˚C (-4˚F to +122˚F), Bluetooth the PDA operator and reading modules system
  • System: GDD 3600W or 5000W IP TxII-5000W the power and voltage
  • Output Voltage Range: 150V to 2400V / 14 Steps
  • Power Source: Standard 220V/240V, 50-60Hz