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Eddy Current Inspection


Centurion NDT Flaw Detectors

ED 520me - Portable Eddy Current Flaw Detector

ED 520me - Portable Eddy Current Flaw Detector

The Model ED-520 is a highly sensitive resonance-type eddy current unit that locates surface and near-surface discontinuities in non-magnetic materials as well as surface defects in magnetic materials, where permeability is relatively constant throughout the test area. In addition, the ED-520 sorts classes of materials by such properties as hardness, alloy type, carbon content, heat treat condition, tensile strength, and grain structure (where these relate to changes in the magnetic and electrical characteristics of the test part).

The ED-520 is widely used in military and commercial aircraft testing as well as process control, receiving inspection, research, and maintenance. Its compactness, ease of operation, and consistent precision make the ED-520 valuable for testing in foundries, heat treat shops, and manufacturing plants - wherever accurate data must be obtained quickly to establish fatigue or product reliability. The ED-520 features battery operation for extended field use. It’s easily recharged for the AC line, using the supplied AC charger.


  • Proven, reliable microprocessor-based circuit design
  • Automatic, pushbutton selection of operating frequency and balance
  • Wide selection of interchangeable probes and coils
  • Variable frequency range from 55 KHz to 220 KHz
  • Built-in threshold circuit with indicating lamp and audible alarm
  • Extremely versatile, yet simple operation
  • Rugged, dust-proof and weather-resistant aluminum enclosure
  • Includes test block and pencil probe


Case Dimensions (cover closed): 6" deep x 9" wide x 5" high (15.2cm x 22.9cm x 12.7cm)
Weight: 5.5 lbs. (2.48 kg)
Power: 115 or 230V; rechargeable Ni-Cad battery offers eight hour continuous operation
Enclosure: Durable aluminum cover with accessory packet in cover
Frequency Range: Variable from 55 KHz to 220 KHz
Readout: Rectangular meter, 3.5" wide. Scale from 0-500 in 50 divisions
Operating Environment: 0 to 120 at 85% RH


Product Item No.  
ED-520ME Portable Eddy Current Flaw Detector - Call 1-800-962-1788 for More Info


Model ED-400 Flaw Detector

ED-400 Flaw Detector

Model ED-400 is a portable, solid-state eddy current instrument for detecting cracks and other surface defects as small as 0.005” deep in magnetic and non-magnetic metals. It is compact, lightweight, simple to operate and provides excellent signal-to-noise ratio on virtually all metals.

The ED-400 is widely used in maintenance, receiving inspection, process control, final inspection and research. Compact and easy to use, the ED-400 is ideal for acquiring accurate data to establish product reliability in foundries, heat treat shops, manufacturing plants, steel mills and automotive plants.


  • Excellent sensitivity for crack detection in magnetic materials
  • Extremely high signal/noise ratio; virtually ignores background magnetic permeability variations
  • Excellent lift off compensation eliminates errors due to surface scale and coatings
  • Static or wide range dynamic testing
  • Extremely good stability.
  • Adjustable threshold circuit and audio indicator.
  • Operates on two "AA" Alkaline batteries.
  • Wide selection of interchangeable probes.
  • Includes standard reference block for checking equipment performance.


Case Dimensions:    3.5" x 7.1" x 1/9" high (8.9cm x 18cm x 0.28cm)
Weight: 0.8 lb (0.32 kg) with probe attached
Frequency: 100 kHz (kilocycles/second)
Power Requirements: Two "AA" alkaline cells
Readout: Rectangular meter, 2.5" wide.  Scale 0-500 in 50 divisions
Operating Environment: 0 to 120 at 85% RH


Product Item No.  
Model ED-400 Flaw Detector - Call 1-800-962-1788 for More Info