The Bathycorrometer® is a consistent way of determining the corrosion of subsea structures.  First developed primarily to allow the diver greater surveying freedom by providing direct readout at the point of application.

The first unit went into rigorous North Sea service in 1971.  Customer satisfaction with the performance of Bathycorrometers has led to specified use, world wide.  The current model retains the features of the Roxby unit but with modern electronics.

Bathycorrometers are used for polarisation, corrosion and interaction surveys, in particular as part of the commissioning check or inspection of:

  • Production & Drilling Platforms
  • Subsea Pipelines
  • Ships Hulls
  • Jetties and other marine works

The Bathycorrometer operates to 350m depth and includes an illuminated digital display.  It has a facility for adding remote monitoring and is simple to use and maintain.  It also includes a robust and inert housing.


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In 2015 James Fisher Defence and Divex merged to form JFD.

Today, JFD serves customers in 81 countries across six continents.

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