Inside Application Eddy Current: Material Composition, Key Features, and Industrial Benefits

Applications of Eddy Current Testing

Eddy current testing (ECT) is a highly effective non-destructive testing (NDT) method widely used across industries to inspect materials without causing damage. This electromagnetic technique detects flaws, measures material properties, and ensures quality and safety in manufacturing, maintenance, and recycling processes. Because it doesn’t alter or harm the tested components, eddy current testing supports continuous production while maintaining high reliability.

Detecting Flaws in Metal Parts

Eddy current instruments are capable of identifying surface and near-surface defects such as cracks, voids, corrosion, and pitting in critical metal components used in aerospace, automotive, and heavy machinery. By detecting these flaws early, manufacturers and maintenance teams can prevent equipment failure, reduce downtime, and enhance operational safety.

Checking Metal Coatings

Protective coatings like zinc, chrome, or paint are applied to metals to prevent rust and wear. Eddy current testers accurately measure coating thickness without contact, ensuring compliance with quality standards. This non-invasive method allows for high-speed inspection of large batches, significantly improving efficiency over manual measurement techniques.

Assessing Electrical Conductivity

Since eddy currents are influenced by a material’s electrical conductivity, this method is ideal for verifying material composition, heat treatment effectiveness, and alloy consistency. Eddy current tools help manufacturers ensure that conductive components meet required specifications, enhancing product reliability and streamlining production quality control.

Testing Welds

Welds are critical structural joints that must be free of cracks, porosity, and incomplete fusion. Eddy current testing provides a rapid, reliable way to inspect weld integrity in pipelines, pressure vessels, and structural steel. Early detection of weld defects allows for immediate repair, minimizing safety risks and costly failures.

Sorting Scrap Metal

In recycling facilities, eddy current separators use electromagnetic fields to distinguish between non-ferrous metals (like aluminum and copper) and non-metallic waste. These separators repel conductive metals, effectively sorting materials at high speed. This automation improves recycling efficiency, increases material recovery, and reduces contamination.

Checking Heat Exchangers

Heat exchangers in power plants, refineries, and HVAC systems are prone to tube degradation due to thermal stress and corrosion. Eddy current flaw detectors can scan tubes for thinning walls, pitting, and micro-cracks, preventing leaks and catastrophic failures. Regular ECT inspections extend equipment life and enhance plant safety.

Testing Circuit Boards

Modern electronics rely on precise circuitry. Eddy current instruments detect open circuits, short circuits, and trace discontinuities on printed circuit boards (PCBs). This non-contact testing ensures electronic devices function correctly before deployment, reducing field failures and improving product quality.

Detecting Surface Defects

While primarily used for metals, eddy current technology can also identify surface anomalies in conductive-coated plastics or composites. Eddy current test instruments detect micro-cracks, delamination, and inconsistencies that could compromise structural integrity or aesthetics, especially in aerospace and automotive components.

Application	Industry	Key Benefit	Inspection Speed
Detecting Metal Flaws	Aerospace, Automotive	Prevents catastrophic failures	High
Coating Thickness Measurement	Manufacturing, Automotive	Non-contact, precise readings	Very High
Conductivity Testing	Metal Production, QA	Material verification	Medium-High
Weld Inspection	Construction, Oil & Gas	Ensures structural integrity	High
Scrap Metal Sorting	Recycling	Automated, efficient separation	Very High
Heat Exchanger Testing	Power Generation, HVAC	Prevents leaks and downtime	Medium
Circuit Board Testing	Electronics	Ensures functionality	High
Surface Defect Detection	Aerospace, Automotive	Early flaw identification	High

Expert Tip: For optimal results in eddy current testing, ensure proper probe selection and calibration based on material type, geometry, and defect depth. Surface preparation and consistent probe movement also significantly affect detection accuracy.

In summary, eddy current applications enhance safety, efficiency, and quality across a wide range of industries. From detecting microscopic cracks to automating metal recycling, this versatile non-destructive testing method enables rapid, reliable inspections without disrupting production. As technology advances, eddy current systems continue to play a vital role in maintaining the integrity of critical components and infrastructure.

Types of Eddy Current Test Equipment

Eddy current testing (ECT) is a vital non-destructive evaluation method used across aerospace, automotive, manufacturing, and energy industries to detect surface and near-surface flaws in conductive materials. By inducing electrical currents in the material and measuring changes in the resulting magnetic fields, ECT equipment can identify cracks, corrosion, pitting, and material thinning—without causing damage. Selecting the right type of eddy current test equipment ensures accurate, efficient, and reliable inspection results tailored to specific applications and component geometries.

Eddy Current Testing Instruments: Types and Applications

Modern eddy current testing instruments are designed for versatility, precision, and ease of use. They operate on the principle of electromagnetic induction, where a coil carrying alternating current generates eddy currents in the test material. Disruptions in these currents—caused by defects or material variations—are detected and displayed in real time. Below is a detailed overview of the most commonly used types of eddy current test equipment and their specialized functions.

Eddy Current Handheld UT Tester

Handheld eddy current testers are portable, user-friendly devices ideal for on-site inspections and rapid surface evaluations. These tools are especially effective for detecting surface-breaking cracks, corrosion, and heat damage in conductive metals such as aluminum, steel, and titanium. Designed for immediate feedback, they often feature audible alarms, LED indicators, or small digital displays that alert the operator when anomalies are detected.

Commonly used in field maintenance, aircraft inspections, and pipeline assessments, handheld units allow technicians to scan complex geometries and hard-to-reach areas with minimal setup. Their portability makes them indispensable for routine checks and emergency diagnostics in industrial environments.

Eddy Current Array UT Detector

Eddy current array (ECA) detectors represent an advanced evolution of traditional ECT technology. Instead of a single coil, these systems utilize multiple coil elements arranged in a specific pattern, enabling wide-area coverage in a single pass. This significantly increases inspection speed and data density, making ECA ideal for large-scale applications such as aircraft fuselage scanning, heat exchanger tube inspection, and weld evaluation.

These detectors produce detailed C-scan images that visually map flaws across the surface, allowing for precise localization and sizing of defects. With improved signal-to-noise ratios and better coverage consistency, ECA systems reduce human error and enhance repeatability—critical factors in safety-critical industries like aviation and power generation.

Eddy Current NDT Equipment

General-purpose eddy current non-destructive testing (NDT) equipment is engineered for comprehensive material evaluation without altering or damaging the component. These systems go beyond simple flaw detection to assess material properties such as conductivity, hardness, coating thickness, and heat treatment condition.

Used in quality control labs and production lines, this equipment integrates with automation systems for high-throughput inspections. Advanced models offer phase analysis, frequency mixing, and impedance plane displays for detailed signal interpretation. Their versatility supports applications from aerospace turbine blade inspection to automotive suspension component verification.

Eddy Current Flaw Searchers

Flaw searchers are specialized eddy current instruments optimized for identifying discontinuities such as cracks, voids, and inclusions in conductive materials. These devices are calibrated for high sensitivity and are often used in preventive maintenance programs to catch defects before they lead to component failure.

Widely employed in the aerospace, rail, and automotive sectors, flaw searchers provide real-time visual and auditory feedback via built-in screens and alarms. They are particularly effective for inspecting fastener holes, landing gear components, and engine parts where fatigue cracking is a concern. Their ability to detect subsurface flaws (up to a few millimeters deep) makes them a key tool in structural integrity assessments.

Equipment Type	Best For	Key Advantages
Handheld ECT Tester	Field inspections, surface crack detection	Portable, real-time feedback, easy to operate
Eddy Current Array (ECA)	Aircraft skins, large metal surfaces	Fast scanning, full-area imaging, high accuracy
NDT Multi-Function Equipment	Material property analysis, production QA	Versatile, supports automation, detailed diagnostics
Flaw Detection Systems	Safety-critical components, fatigue-prone areas	High sensitivity, real-time alerts, deep flaw detection

Choosing the Right Eddy Current Equipment

Application Requirements: Match the equipment to your inspection goals—surface scanning, subsurface flaw detection, or material characterization.

Material Type: Ensure compatibility with the conductivity and permeability of the test material (e.g., aluminum vs. steel).

Portability Needs: Choose handheld units for fieldwork or benchtop systems for lab environments.

Data Output: Decide whether you need simple pass/fail indicators or detailed imaging and reporting capabilities.

Regulatory Compliance: Select equipment that meets industry standards such as ASTM E309, ASME Section V, or ISO 15549 for certification purposes.

Important: Always calibrate eddy current equipment before use and perform regular system checks using reference standards. Using improper settings or uncalibrated instruments can lead to false negatives, risking undetected failures. Training and certification in NDT methods are strongly recommended for reliable and compliant inspections.

Product Specifications and Features of Eddy Current Test Equipment

Eddy current testing (ECT) equipment is a vital non-destructive testing (NDT) solution used across aerospace, automotive, manufacturing, and energy sectors to detect surface and subsurface flaws in conductive materials. These advanced tools offer precision, speed, and reliability, making them essential for quality assurance and preventive maintenance. Below is a detailed breakdown of key features, installation procedures, and maintenance practices to maximize performance and equipment longevity.

Key Features

Modern eddy current test devices are engineered for high sensitivity and real-time feedback, ensuring accurate defect detection and material characterization. The following features highlight the capabilities of both compact and industrial-grade models:

Measuring Distance: The compact eDdy model offers an impressive range of up to 3,900 feet (1,189 meters), ideal for field inspections. The larger industrial unit maintains reliable signal integrity over distances exceeding 1,300 feet (396 meters), suitable for pipeline and structural evaluations.
Working Hours: Powered by a rechargeable battery, the device operates for approximately 8 hours on a single charge. When used with the optional lanyard power accessory, runtime extends to 15 hours, enabling uninterrupted operation during extended fieldwork or shift-based inspections.
Live Display: Equipped with a high-refresh display that updates at 3 times per second (3 Hz), the system provides near-instantaneous visualization of impedance changes. Real-time data can be logged internally for post-inspection analysis, compliance reporting, or trend monitoring.
Mobile App Integration: Seamless Bluetooth connectivity allows pairing with a dedicated smartphone or tablet application. The app enables instant data capture, cloud synchronization, PDF report generation, and sharing via email or messaging platforms—streamlining documentation and team collaboration.

Technical Advantage: Real-time feedback and wireless data export reduce inspection turnaround time and enhance reporting accuracy.

Performance Specifications

To support diverse industrial applications, eddy current testers are calibrated for sensitivity, frequency range, and environmental resilience. The table below summarizes key technical parameters:

Parameter	Compact Model	Industrial Model
Frequency Range	100 Hz – 10 MHz	50 Hz – 15 MHz
Display Refresh Rate	3 Hz	3 Hz
Battery Life (Standard)	8 hours	8 hours
Extended Runtime (with Lanyard)	15 hours	15 hours
Connectivity	Bluetooth 5.0	Bluetooth 5.0 + USB-C
Operating Temperature	-10°C to 50°C	-20°C to 60°C

Note: Higher frequency ranges improve resolution for detecting fine cracks and corrosion in thin materials.

How to Install Eddy Current Testing Equipment

Proper installation and setup of eddy current NDT tools are critical to achieving accurate and repeatable results. Whether used in laboratory settings or on-site, following a structured procedure ensures optimal performance and safety. The process applies to both handheld and benchtop systems.

Selecting the Work Surface: Choose a clean, flat, and vibration-free surface to prevent signal interference. Avoid areas with electromagnetic noise (e.g., near motors or transformers) for consistent readings.
Attaching Probes: Connect the appropriate eddy current probe (absolute, differential, or array) to the main unit using the provided shielded cable. Ensure connectors are fully seated and locked to prevent signal loss.
Setting Parameters: Input the material type (e.g., aluminum, steel, titanium) into the device. Adjust test frequency, gain, phase rotation, and lift-off compensation based on the application and defect type being targeted.
Calibration: Use a certified calibration standard (reference block with known flaws) to calibrate the system. Perform nulling and balancing to eliminate baseline noise and ensure sensitivity to small defects.
Test Run: Conduct a preliminary scan on the calibration block. Verify that flaw signals appear at expected locations and amplitudes. Adjust filters or thresholds if necessary.
Start Testing: Begin inspection by smoothly moving the probe over the test surface. Monitor live impedance plane or strip chart display for anomalies. Mark any suspect areas for further evaluation.

Expert Tip: Always perform a system check at the beginning and end of each inspection session to ensure equipment stability and data integrity.

Maintenance and Repair Guidelines

Regular maintenance of eddy current test equipment preserves accuracy, extends service life, and reduces downtime. Even compact models like the eDdy require consistent care to perform reliably under demanding conditions.

Daily Checks: Inspect the device housing, screen, and controls for damage. Clean the surface with a soft, dry cloth to remove dust, oil, or debris that could interfere with operation.
Battery Care: Recharge the battery after each use. For long-term storage, maintain a charge level of 40–60% and store in a cool, dry place (ideally 15–25°C) to prolong battery health.
Probe Maintenance: Examine probe tips and cables for wear, kinks, or cracks after intensive use. Replace damaged probes promptly to avoid false readings. Store probes in protective cases when not in use.
Software Updates: Regularly check for firmware and mobile app updates from the manufacturer. These often include performance enhancements, bug fixes, and new analysis features that keep your device operating like new.
Periodic Calibration: Schedule professional recalibration every 6–12 months, or after any impact or extreme environmental exposure, to maintain measurement accuracy.

Preventive Strategy: Keep a maintenance log to track inspections, calibrations, and repairs—this supports compliance with ISO 9001, AS9100, and other quality management standards.

Additional Best Practices

Environmental Protection: Use protective covers in wet or dusty environments to prevent moisture and particulate ingress.
Data Security: Enable password protection and automatic backup features in the mobile app to safeguard sensitive inspection data.
Training: Ensure operators are trained in both equipment use and interpretation of eddy current signals for reliable defect identification.
Probe Selection: Match probe type and frequency to the material thickness and defect orientation (e.g., surface cracks vs. subsurface voids).
Warranty & Support: Register your device with the manufacturer to access technical support, extended warranties, and repair services.

Quality and Safety Considerations for Eddy Current Test Equipment

Eddy current testing (ECT) is a non-destructive evaluation method widely used in aerospace, manufacturing, and energy sectors to detect surface and near-surface flaws in conductive materials. While highly effective, the accuracy and safety of ECT depend heavily on proper equipment handling, environmental awareness, and adherence to operational protocols. This guide outlines essential quality control and safety practices to ensure reliable results and protect both personnel and equipment during testing operations.

Safety Warning: Always inspect eddy current equipment before each use. Never operate testing devices in wet conditions or near high-voltage sources without proper protective measures. Discontinue use immediately if damage is detected or during adverse weather conditions such as lightning storms.

Device Protection

Eddy current test equipment is sensitive to environmental factors that can compromise performance and longevity. Exposure to rain, extreme heat, or chemical spills can damage internal circuitry and reduce signal accuracy. Using protective covers or carrying cases when transporting or storing the device shields it from moisture, dust, and temperature extremes. For field operations, consider using weather-resistant enclosures or temporary shelters to maintain optimal operating conditions.

Expert Tip: Store equipment in climate-controlled environments when possible. Avoid leaving devices in vehicles overnight, where temperatures can fluctuate dramatically and cause condensation inside sensitive components.

Checking for Damage

Probes are the most vulnerable part of an eddy current system, often coming into contact with rough, sharp, or heated surfaces during inspections. Before every use, conduct a thorough visual and tactile inspection of probes for cracks, bent tips, frayed cables, or insulation wear. Damaged sensors can produce false readings or fail entirely, compromising inspection integrity. If any damage is found, remove the probe from service and replace or repair it according to manufacturer guidelines.

Battery Management and Power Safety

Many portable eddy current testers rely on long-life internal or removable batteries to maintain consistent power during extended fieldwork. Always replace batteries with models specified by the manufacturer—using incompatible or off-brand batteries can lead to poor performance, overheating, or even device failure. Never force a battery into a compartment; improper fit may indicate incorrect voltage or polarity, posing a fire hazard. Regularly check battery contacts for corrosion and clean them gently with isopropyl alcohol if needed.

Work Area Setup and Trip Hazard Prevention

A cluttered or poorly organized workspace increases the risk of tripping, cable damage, or accidental disconnection during testing. Secure all cables along walls or use cable ramps to prevent tripping hazards. Keep low-hanging tools, extension cords, and test leads organized and out of walkways. When working in confined or industrial spaces, clearly mark the testing zone and use warning tape if necessary to alert others to ongoing inspection activities.

Noise Dampening and Signal Interference Control

Eddy current systems are susceptible to electromagnetic interference (EMI) from nearby machinery, radios, or even conversations near the device. External noise can distort readings and reduce detection sensitivity. To minimize interference:

Conduct tests in quiet, controlled environments whenever possible
Turn off unnecessary electronic devices in the vicinity
Use shielded cables and grounded equipment setups
Consider wearing noise-canceling headphones if ambient sound affects concentration during data analysis

Internal Component Maintenance and Scheduled Inspections

Over time, internal components such as oscillators, amplifiers, and connectors can degrade due to vibration, thermal cycling, or electrical stress. Schedule routine internal diagnostics using factory-recommended calibration tools or send the unit to an authorized service center for periodic maintenance. Regular internal checks help identify early signs of wear, prevent unexpected failures, and ensure measurement consistency across inspections.

Safe Handling and Use Guidelines

Eddy current probes often feature fine tips and sensitive coils designed for precision scanning. Handle them with care to avoid bending or crushing. Always follow the manufacturer’s operating instructions for probe placement, scanning speed, and lift-off distance. When not in use, store probes in protective cases. Never carry active probes near other metal objects, as unintended contact can cause false signals or physical damage to the probe tip.

Preventing Liquid Exposure and Contamination

Since eddy current testing relies on electromagnetic fields interacting with conductive materials, the presence of liquids—especially water or conductive fluids—can severely distort readings. Keep all equipment dry and away from spill-prone areas. If a spill occurs, power down the device immediately, disconnect probes, and wipe all surfaces with a dry, lint-free cloth. Allow the unit to air-dry completely before re-powering. In humid environments, use desiccant packs in storage containers to prevent moisture buildup.

Health and Environmental Precautions

Some testing environments contain weak structural components, energized systems, or hazardous energy sources. Exercise caution when deploying equipment in such areas. Suspend all testing operations during thunderstorms or lightning activity, as electrical surges can damage sensitive electronics and pose a risk to operators. Additionally, ensure that personnel are trained in emergency shutdown procedures and that all equipment is properly grounded when used near high-voltage installations.

Safety Area	Best Practices	Risks of Neglect	Recommended Tools/Supplies
Device Protection	Use protective cases, avoid extreme temperatures	Circuit damage, reduced lifespan	Weatherproof cases, climate-controlled storage
Probe Inspection	Visual and functional check before each use	Inaccurate readings, equipment failure	Magnifying glass, continuity tester
Battery Safety	Use OEM-approved replacements only	Overheating, fire hazard	Manufacturer-specified batteries, cleaning swabs
Worksite Organization	Secure cables, clear walkways	Trips, cable damage, data loss	Cable ties, floor protectors, warning tape
Signal Integrity	Minimize EMI, use shielded setups	Noisy data, missed defects	EMI meters, grounded test benches
Liquid Exposure	Keep dry, immediate cleanup after spills	Short circuits, false readings	Water-resistant covers, desiccants, dry cloths

Maintenance Reminder: Implement a preventive maintenance log for your eddy current equipment. Record inspection dates, battery changes, probe usage hours, and calibration results to track performance trends and support compliance with quality assurance standards.

Final Recommendations

Train all operators on proper handling, inspection, and emergency procedures
Follow manufacturer guidelines for calibration and servicing intervals
Document all equipment issues and repairs for audit and safety tracking
Use personal protective equipment (PPE) when working in industrial environments
Retire damaged or outdated probes and accessories promptly

By adhering to these quality and safety considerations, organizations can maximize the reliability of their eddy current testing programs while protecting valuable equipment and ensuring the well-being of inspection personnel. Regular training, proactive maintenance, and a culture of safety are key to achieving consistent, accurate, and safe non-destructive testing outcomes.

Frequently Asked Questions About Eddy Current Testing

Q1: What is the purpose of eddy current equipment?

Eddy current instruments are non-destructive testing (NDT) tools designed to detect surface and near-surface flaws in conductive materials. They work by inducing electrical currents—called eddy currents—into metal components and measuring disruptions caused by cracks, corrosion, material thinning, or inconsistencies in conductivity.

High Sensitivity: Capable of identifying very small cracks—even those invisible to the naked eye—making them ideal for aerospace and precision engineering.
Contactless Inspection: The probe does not need to touch the surface directly, reducing wear and enabling fast scanning over large areas.
Real-Time Results: Immediate feedback allows technicians to assess component integrity on-site without delays.
Common Uses: Inspecting aircraft skins, heat exchangers, tubing, welds, and automotive suspension systems.

These advantages make eddy current testing a preferred method in industries where safety, reliability, and efficiency are critical.

Q2: When is an eddy current test required?

Eddy current testing is typically required during routine maintenance, quality control, or safety inspections of critical metal components that must remain structurally sound and free from hidden defects. It's especially important in high-risk environments where failure could lead to serious consequences.

Aerospace Industry: Regular inspection of aircraft fuselages, wings, and engine parts for fatigue cracks after extended use.
Automotive Sector: Checking brake rotors, suspension components, and transmission parts for wear and structural integrity.
Energy & Power Plants: Monitoring steam generator tubes, heat exchangers, and pipelines for corrosion or erosion.
Manufacturing: Ensuring material consistency and detecting flaws in raw metals or finished products before deployment.
Safety Compliance: Required by regulatory standards such as FAA, ASME, or ISO for periodic NDT checks on critical infrastructure.

Testing is also performed after repairs, modifications, or exposure to extreme conditions like overheating or impact stress.

Q3: What is the difference between ultrasonic and eddy current testing?

While both are non-destructive testing methods, ultrasonic and eddy current testing differ significantly in their principles, applications, and capabilities. Understanding these differences helps determine the best method for a given inspection task.

Feature	Ultrasonic Testing (UT)	Eddy Current Testing (ET)
Principle	Uses high-frequency sound waves to detect internal flaws through material thickness.	Uses electromagnetic induction to identify surface and near-surface defects in conductive materials.
Penetration Depth	Deep—can inspect entire thickness of materials (e.g., thick welds, castings).	Shallow—limited to surface and subsurface layers (typically up to a few millimeters).
Material Compatibility	Works on metals, plastics, composites, and ceramics (as long as sound can propagate).	Only effective on electrically conductive materials (e.g., aluminum, steel, copper).
Surface Preparation	Requires coupling medium (gel or liquid) and smooth surfaces for proper sound transmission.	Minimal preparation needed; works through thin coatings or paint layers.
Portability & Speed	Slower due to coupling requirements and point-by-point scanning.	Faster scanning with no couplant; ideal for rapid inspections of large surfaces.
Common Applications	Inspecting thick sections, internal voids, delamination, and bond integrity.	Detecting surface cracks, corrosion, material thinning, and conductivity variations.

In summary, ultrasonic testing excels at deep internal flaw detection, while eddy current testing is superior for fast, precise surface inspections—especially in conductive materials.

Q4: What are examples of eddy current applications?

Eddy current testing has a wide range of practical and industrial applications due to its speed, accuracy, and non-invasive nature. Some key examples include:

Aircraft Maintenance: Inspecting aluminum fuselage panels, wing structures, and landing gear for micro-cracks caused by stress and fatigue.
Automotive Safety Checks: Testing brake discs, suspension components, and drive shafts for wear, cracks, or heat damage.
Railway Track Inspection: Detecting surface cracks in rails and wheels, especially in high-traffic or aging infrastructure.
Recycling & Material Sorting: Identifying and separating different types of non-ferrous metals (e.g., aluminum vs. copper) based on their electrical conductivity.
Heat Exchanger & Boiler Tube Testing: Checking for corrosion, pitting, and wall thinning in metal tubes without disassembly.
Manufacturing Quality Control: Verifying material composition, hardness, and coating thickness in production lines.
Research & Development: Studying material properties, fatigue behavior, and defect formation in laboratory settings.

Its versatility and safety make eddy current technology invaluable across engineering, transportation, energy, and recycling sectors.

Q5: What happens during eddy current testing?

During an eddy current test, a technician uses a handheld probe containing a coil through which alternating current flows. This generates a changing magnetic field that induces swirling electrical currents—known as eddy currents—within the conductive material being tested.

Current Induction: As the probe moves over the surface, eddy currents form just below the surface of the metal.
Flaw Detection: If there is a crack, corrosion, or change in material thickness, it disrupts the flow of eddy currents, altering the magnetic field.
Data Collection: The instrument detects these changes in real time and displays them on a screen as impedance variations (often shown as signal amplitude or phase shifts).
Analysis: A trained inspector interprets the signals to determine the size, depth, and location of any defects.
No Surface Damage: The process is completely non-invasive and leaves no residue or damage to the component.

Because it doesn’t require direct contact or surface preparation, eddy current testing is fast, clean, and highly effective for inspecting large or complex surfaces—making it a go-to method for preventive maintenance and safety assurance in critical systems.