Dual Array Probes For Corrosion

Advantages and Features

• Advanced pulse-receive (PR) wiring that supports complex focal laws
  • Total focusing method (TFM)
  • Phase coherence imaging (PCI)*
• Pitch-catch technology reducing interface-echo amplitude for optimum surface resolution
• Optimized beam firing capabilities
• On-board focal law files on the OmniScan™ X3 flaw detector
• Maximized capabilities when using OmniScan X3 and OmniScan X3 64 flaw detectors
• Compatibility with instruments featuring pulser/receiver modules
• Compatibility with WeldSight™ advanced inspection and analysis software
• Detect defects as shallow as 1 mm (0.04 in.) below the surface
• Wide beam coverage of up to 30 mm (1.18 in.)
• Typical inspection depth of 1 to 80 mm in carbon steel
• Quick adjustment system adapts to diameters from 4 in. to flat
• Replaceable delay line, built-in irrigation, and durable carbide wear plates

*PCI is only available on the OmniScan X3 64 flaw detector.

Typical Applications

The DLA REX1 PR probe enables you to perform fast and efficient manual, automated, or semiautomated inspections, providing high-quality imaging to obtain accurate measurements of flaws. It’s a preferred tool for corrosion monitoring as well as critical defect assessment of pitting, creep damage, and hydrogen induced cracking (HIC).

Dual Array Pitch-Catch Technique

Like dual-element UT probes, DLA probes incorporate separate transmitting and receiving elements mounted on delay lines that are cut at an angle. This configuration generates beams that focus beneath the surface of the test piece, considerably decreasing the amplitude of surface reflections. This results in increased near-surface resolution, providing higher probability of detection (POD) of critical defects such as pitting, creep damage, and HIC (hydrogen induced cracking).

New Features, New Possibilities

Newer advanced ultrasonic techniques such as the total focusing method (TFM) and phase coherence imaging (PCI) involve complicated firing sequences that are beyond the firing capacity of standard dual linear probes¹. Our REX1 DLA PR model is optimized to support the complex focal law demands of OmniScan™ X3 units with TFM and OmniScan X3 64 flaw detectors with PCI and TFM.

As well as high-quality PA imaging, the REX1 DLA PR probe enables efficient TFM and PCI scanning, as shown in these examples of data acquired of hydrogen induced corrosion (HIC) in steel.

¹ Legacy non-PR REX1 and ULT1 versions of our DLA probes are still available upon request. These legacy DLA probes are wired odd/even (1-2,3-4, etc.) and are most compatible with instruments without a pulser/receiver module or integrated pulser/receiver capability (e.g., the OmniScan MX2). While these probes are currently available in the OmniScan X3 scan plan’s probe library, the non-PR versions cannot be used in an advanced scan plan, for TFM or PCI, etc.

For maximum compatibility, the OmniScan X3 series is preconfigured with the specifications of our DLA probes, making the inspection setup quick and easy. When creating a TFM or PCI scan plan, simply choose your DLA model from the probe list and proceed with focal law configuration directly on the instrument.

Learn more about the capabilities of DLA probes, the OmniScan X3 series, TFM, and PCI.

Specifications

Probe Specifications and Dimensions

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