Electrical Resistivity and Induced Polarization Instrument (ERI)

Electrical Resistivity and Induced Polarization Instrument (ERI)

Using This Equipment

For more information and to utilize this equipment, please contact Andrew Nyblade.

Equipment full name: Syscal Pro Switch 48 Resistivity


The ERI is an all-in-one multi-node resistivity and induction polarization imaging system. The Pro offers a maximum 1,000V transmitting pulse (2,000V peak to peak), at up to 2.5A, for a total of 250W of transmitting power. The multi-electrode imaging system supports up to 120 electrodes on a single line at 10m spacing.


  • A 10-channel resistivity meter
  • Allows for simultaneously obtaining a set of 10 measurements and performs automatic switching of the electrodes
  • Equipped with software that allows the user to:
  • Create 2D/3D-surface/borehole measurement sequences
  • Create some sequences of measurements, manually or automatically (with an estimated maximum investigation depth specified by the user)
  • A specific mode that allows for continuous logging, specially designed for marine applications

Example Applications

  • Groundwater mapping
  • Fresh/saltwater contact determination
  • Depth to bedrock measurements
  • Thickness of bedrock alterations
  • Aquifer layers- determination of depth and thickness
  • Pollution monitoring (Jeremy, not sure what pollution monitoring means??)
  • Location and imaging of buried structures
  • Detection and characterization of sub-surface cavities
  • Geotechnical applications-detection/location of clayey layers

Rental Cost includes:

  • Written standard operating procedures
  • Training on use, calibration, and maintenance as appropriate (as needed-depends on length of rental period)