TRT measurements Off-/Near-/Inshore Holland – cooperation with MSH

This autumn, FIELAX has gathered data for two cable route projects with Marine Sampling Holland ( We have measured a total of more than 100 profiles of temperature and TRT (thermal resistivity) data offshore Holland as well as in the Ijsselmeer. As the requirement was high resulotion profiling to a sub-bottom-depth of >6m, special coiled sensor tubes with a total length of 8m were manufactured. Read more

World Premiere: HeatFlow measurements at great depths (10.000m)

10.000m equates to 1000bar - that's quite a lot.

The mean depth of the world ocean is 'only' about 3.700m but the great deep sea plains are below that and the tectonic trenches often reach water depths well in the 7-8-thousand meter range. However, so far only 12 locations are known where the ocean depth exceeds 10.000m from which the deepest is the so-called Vityaz Deep (a part of the Challenger Deep, cf.

We proudly announce that we have managed to modify our well-established measuring system to resist 1000bar of outer pressure and herewith present the new model HeatFlowProbe UD (UD for Ultra Deep).
You are invited to find out about heat flow in the greatest depths of
the ocean (as long as your wire is long enough...).

Review article about sediment temperatures and 2K-criterion available online

A team of scientists from FIELAX has submitted a manuscript about the variability of sediment temperatures and the so-called 2K-criterion to the Elsevier journal 'Applied Thermal Engineering'. The manuscript: /Temperatures in shallow marine sediments: Influence of thermal properties, seasonal forcing, and man-made heat sources/ was accepted today and is available under the following link:

Highlights of this article are:

  • Sediment thermal properties are highly variable.
  • Seasonal forcing causes large spatial and temporal sediment temperature variations.
  • Power cable temperatures strongly depend on thermal properties of a given site.
  • The 2K-criterion is not suitable to detect man-made heat injection.