Portable Eddy Current Flaw Detectors

Eddy Current Testing Equipment FAQs

How does eddy current measurement work?

Eddy current testing is a nondestructive testing (NDT) method that can be used for various inspection and detection applications. Eddy current inspections work using an electromagnetic field to measure the response from a material. Eddy current testing equipment generates magnetic fields, which induce a current that flows in a test piece (e.g., a conductor such as a coil). This influences the magnetic field, as well as the magnitude and phase of voltage in the coil. Any changes in conductivity, such as defects or thickness differences, can affect the resulting eddy current. This technology can then be used to measure distance or to detect flaws in conducting materials such as corrosion, erosion, wear, pitting, baffle cuts, wall loss, and cracks.

What is eddy current testing equipment used for?

Eddy current testing equipment is used to inspect conductive materials for surface and near-surface defects without damaging the part. Common applications include detecting cracks, corrosion, erosion, pitting, wall loss, thickness changes, and bolt hole defects in industries such as aerospace, automotive, manufacturing, and power generation.

What industries use eddy current equipment?

Eddy current equipment is widely used across industries like aerospace, oil and gas, manufacturing, automotive, and power generation industries. It is commonly used to inspect aircraft fastener holes, heat exchanger tubes, welds, pipelines, rail components, and other metal structures.

What materials can an eddy current tester inspect?

An eddy current tester can inspect electrically conductive materials, including aluminum, stainless steel, titanium, copper, brass, and carbon steel. Because eddy current testing relies on electromagnetic induction, it cannot be used on nonconductive materials such as plastics or ceramics.

Does Evident offer eddy current array equipment?

Yes, we offer a range of eddy current array equipment. Browse our selection of eddy current array flaw detectors to learn more.

Eddy Current Array FAQs

What is eddy current array testing?

Eddy current array testing is an advanced nondestructive testing method that uses multiple coils arranged in a single probe to inspect a material. This approach enables faster scanning, wider coverage, and more consistent results compared to conventional eddy current testing. In addition, ECA technology can generate C-scan images, providing a clear visual representation of inspection data to support defect detection and characterization.

What's the difference between ECA and ECT?

Eddy current array technology is an extension of traditional eddy current testing (ECT). While traditional ECT uses a single element, eddy current array probes employ an array of elements, enabling faster inspections, wider coverage, and more consistent results. Learn more about the difference between eddy current array technology and traditional eddy current testing in the eddy current array tutorial.

What are eddy current array flaw detectors used for?

Eddy current array flaw detectors are used to inspect conductive materials for surface and near-surface defects. They are commonly applied for crack detection, corrosion assessment, weld inspection, and material quality control across industries like aerospace, manufacturing, and energy.

How does eddy current array technology work?

Eddy current array technology works by electronically driving multiple sensors positioned side by side in a probe. These sensors generate and measure eddy currents in the material, allowing the system to detect variations caused by defects, thickness changes, or material inconsistencies.

What are the advantages of eddy current array inspection?

Eddy current array inspection offers faster inspections, broader coverage, and improved probability of detection. It also provides high-resolution data visualization, allowing inspectors to identify and characterize defects more efficiently in a single pass.

What types of defects can eddy current array inspection detect?

Eddy current array inspection can detect surface cracks, near-surface defects, corrosion, pitting, and material loss. It is also effective for identifying variations in conductivity and thickness in conductive materials.