Pulsed Eddy Current (PEC)

Technology is always evolving. In our quest to improve, we have created devices that take arduous tasks and find simpler and most times faster solutions.  Such is the case in NDT as it is applied to Corrosion under Insulation (CUI). In the past, the time-consuming method of removing the insulation, performing UTT, and reinsulating the pipe was the norm.

In recent years, a new method, Pulsed Eddy Current (PEC) has been introduced. This technology can be applied on insulated piping, measuring the remaining wall or thickness of the pipe while the insulation remains in place.  This eliminates the costs of removing and reinsulating the pipe at a substantial saving to the client.


The technology was invented in the early 1990’s but was a cumbersome affair.  The equipment was both fragile and unreliable. It was not until 2015 that a manufacturer (©Eddyfi Technologies, 2021) updated the method with modern software and hardware that it became a viable and attractive alternative to the previous method of removal and replacement of the insulation.

The instrument, called Lyft, is fast, easy to use, and can be used to cover large areas in a single day.



Direct from the manufacturers description: “The Lyft is packed with automation and advanced algorithms that remove operator-specific dependence, thanks to the power of the SmartPULSE™ technology. It automatically optimizes pulser and receiver parameters (gain, duration, time gates, filters, etc.).

SmartPULSE also adjusts Wall Thickness (WT) measurements to ensure optimal performance and repeatability, while limiting the need for advanced knowledge of pulsed eddy current. The user-friendly multi-touch software also includes several innovative features, including real-time C-scan imaging (grid-mapping and dynamic modes), complete wall thickness measurements (ID and OD corrosion), as well as complete inspection management and reporting capabilities.”

PROtect’s technicians are trained in the use of this tool but more importantly, understand the principles of this exciting technology.

While relatively new compared to other NDT methods, the instruction and training received from the manufacturer have enabled our team to become world class experts in the application of Pulsed Eddy Current and as new options and components are added, such as the new Pulsed Eddy Current Array (PECA) tool, we are continually adding to our training regime producing capable and efficient technicians.


Thank you to ©Eddyfi Technologies, 2021 for use of their pictures.

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