Pearson survey

Using the method first introduced by Mr. J. M. Pearson, we can provide the skilled personnel and specialist equipment needed to carry out this survey which determines:

  • location and depth of underground metallic pipelines, structures, cables, etc.
  • location of defects in corrosion protective coating (so called holidays)
  • location of electric contact between the injected test signal and nearby pipeline, etc.

Pearson survey were used extensively in the past.

Although we can still offer such services, we recommend instead the use of a computerised Close Interval Potential Survey (CIPS)  to determine the location and extend of defects in protective coatings and to assess any possible effects those may have on the functionality of cathodic protection systems for underground pipelines.