Game-changing technology for structural integrity monitoring. The Ferrx FEMM (Ferrx ElectroMagnetic Method) has been developed and tested for 2 decades, first by SINTEF and since 2005 by Ferrx. The method has provided unique features for the condition monitoring of steel structures. Material deterioration can be directly measured and early warning of risk for fatigue can be established long before any crack is detectable. Furthermore, the same sensors can also measure changes in metal loss, and thus provide for non-intrusive monitoring of internal corrosion and erosion in pipes. During the last years, instrumentation technology has been industrialized and the first commercial systems have been delivered and installed. Different types of instrumentation systems are available both for onshore and offshore/subsea applications. The industrialization, marinization, and production of the instrumentation systems are being done in cooperation with the most specialized suppliers. Ferrx is an independent company located in Trondheim, Norway with the business idea to provide the FEMM technology for different onshore and offshore markets to monitor the actual condition of steel structures and thus prevent loss of assets and pollution of the environment. The FEMM is protected by 2 patents and all rights are vested in Ferrx. The system for riser inspection has been qualified by DNV-GL in accordance with DNV-RP-A203 Technology Qualification.