TSC is the developer of ACFM® technology and is the world’s only manufacturer and supplier of ACFM® products. Customers who choose to use our technology not only have some of the most reliable surface-breaking crack detection products available, but also the back-up and technical support from the world’s leading authority in ACFM® technology.

Our design and manufacturing processes are certified to ISO9001, so that quality is assured. We employ highly qualified technicians and engineers, metallurgists and physicists; some of whom were involved in the original development of the technology and are still developing new products to meet customers’ challenging inspection needs.

  • Instruments For Use Above Water>
  • Instruments For Underwater Inspection>
  • Thread Inspection>
  • Probes>
  • StressProbe™>

Instruments For Use Above Water

TSC’s AMIGO instrument offer a range of battery powered equipment for use in general applications. Our range of probes can be used in a variety of situations, from site inspection undertaken by abseilers, to thread inspection in workshops. We know reliability is important, especially when working in remote regions, so these instruments are tough enough to withstand the rigours of the industries we serve. Whether you are working in the deserts of the Middle East, or on pipelines in Alaska, we've got the equipment you need. Although primarily used for above-water inspection projects, with the use of underwater probes, the AMIGO instrument can also be used for shallow-water inspections.

The AMIGO can support a wide variety of single-sensor probes as well as multi-channel array probes. In order to make this technology as accessible as possible these products are available for sale, lease, rent, or supplied as part of our site inspection services.

Instruments For Underwater Inspection

TSC’s U31 range of underwater instruments has been developed to provide reliable inspection in harsh environments. With a range of standard products covering depths to 3,000m, we have the tools you need to conduct surface crack detection underwater. TSC has pioneered the deployment of both diver and diverless underwater ACFM®, so whether you need to deliver inspections using ROVs, mini ROV, crawlers or divers, we have the solution.

To complement the instrumentation, we offer a range of underwater probes to cover a wide range of applications commonly found subsea. This probe range includes simple diver probes to advanced array systems for use with mini ROVs.

Products for diver use are available for sale, lease, rent or supplied as part of our site inspection services. Our products for remote deployment require specialist remote deployment tooling and are only offered as part of our site inspection service.

Thread Inspection

TSC’s ACFM® thread inspection solutions are widely used across the drilling sector for the inspection of threaded components. Our technology requires less cleaning than conventional thread inspection methods and can be used on both magnetic and non-magnetic components. By avoiding the need to clean off all of the dope, this provides significant advantages over conventional thread inspection methods such as MPI and dye penetrants. When you add the ability to store every piece of inspection data for audit and review, this provides a huge advantage both in terms of preparation time and inspection reliability.

For small components that can be rotated during inspection, we offer universal thread probes. In situations where it is undesirable to rotate the component, we offer our Automated Thread Inspection (ATI), which is field-proven and included in the North Sea Drilling Inspection Standard (NS2). The use of ATI provides our customers with reliable and automated defect detection for a variety of environments under any lighting conditions.


TSC offers a wide range of ACFM® probes, from simple single-sensor probes through to advanced multi-sensor arrays. Our standard frequency probes have been developed to optimise performance on carbon steel components and welds. This probe range also includes high frequency versions of many of our standard probes, which are used for inspecting non-magnetic materials.

With a choice of probes and arrays in above and underwater varieties to suit all purposes, sizes, angles and depths plus a customised option, TSC can supply the right equipment needed for your particular inspection project.


Calibration of an underwater probe for use on 114mm mooring chain offshore Brazil.

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.

StressProbe™ used to map strain distribution on a 16” gas pipeline during a dig.

Features & Benefits

  • Efficient: reusable probe
  • Non-Destructive Testing: minimal surface preparation, only requires removal of loose corrosion products
  • Versatile: can be used indoor, outdoor and underwater
  • Ease of use: convenient static placement of the probe
  • Customised solution: configured for individual applications and specific customer requirements


  • 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