Electre II
from Iris Instruments

Electre II is used to construct 2D linear sequence files which define instrument settings and control the order measurements are recorded. The package permits users to experiment with various electrode geometries to determine the appropriate survey parameters prior to data acquisition.

In many cases the environment dictates the maximum resistivity spread length and it is not always possible to position the electrodes at the necessary interval to achieve the desired prospection depth. Electre II enables users to develop a well-considered survey design prior to data collection and where necessary adapt the electrode geometry or array type to optimise data point spatial density.

After creating a master sequence file subsequent Roll-a-long files can be generated with a click of a button. Roll-a-long files are used to extend the length of profiles without duplicating measurements unnecessarily. When using standard Wenner and Dipole-Dipole array configurations it is possible to continually record measurements whilst rolling the sequence, considerably improving productivity.

Electre II Main Screen showing ERT sequence using s Wenner array and 5m electrode intervals.


  • Configure the spread geometry.
  • Set the minimum and maximum stack limit.
  • Assign a convergence limit for the stack cut off.
  • Upload files to Syscal Switch

Data Sheet