A direct assessment
of strain, even through coatings,
without bonding
to the surface


StressProbe™ is an electromagnetic method for measuring strain in ferromagnetic metals. When such metals come under load conditions, there is a small change in permeability in the direction of the strain, compared with that orthogonal to it. StressProbe™ was developed by TSC to detect and measure these subtle changes to provide a direct value of strain.

Unlike conventional strain gauges, StressProbe™ does not require bonding to the surface and can be used through non-metallic coatings up to a thickness of 5mm.

The main application for StressProbe™ is the measurement of dynamic strains although strain distributions can be determined in certain circumstances.



  • Buried pipeline assessment deployed by in-line inspection tools
  • Dynamic load measurement: Mooring chains, offshore structures, bridges and masts
  • Mapping of strain distribution in civil engineering applications such as bridges and I-beam constructions
  • Structural monitoring of subsea structures