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TesTex uses a variety of state-of-the-art electromagnetic techniques to scan for defects in both ferrous and nonferrous materials and structures.

LFET Products

Low Frequency Electromagnetic Technique (LFET) products are used to inspect storage tanks, other convex or concave ferrous surfaces, as well as nonferrous metal tubing/piping surfaces.

RFET Products

Remote Field Electromagnetic Technique (RFET) products are used to quickly and accurately inspect ferrous tubing found in heat exchangers and drum-to-drum boiler generating banks.

BFET Products

Balance Field Electromagnetic Technique (BFET) products are used to detect surface and sub-surface cracking in welds and base metals.

ECT Products

Eddy Current Technique (ECT) is used to quickly and accurately inspect non-ferrous metal tubing from the tube internal dimension (ID).


TesTex has enhanced ultrasonic (UT) inspection for many different applications, including tank shells, UT prove-ups, finned tubes and waterwalls.


TesTex produces standard and custom probes (and calibration tubes) for all of its ID (internal dimension) inspection equipment.


This is a great place to check out Technical papers, Case Studies, and any other relevant news related to our specialized non-destructive testing products and services.

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Crack Detection Services

NDT Weld Crack Detection with BFET

The Hawkeye 2000 and its variants use the principles of Balance Field Electromagnetic Technique (BFET) to detect surface and sub-surface cracking in welds and base metal. With maximum scanning speeds of one foot per second, the Hawkeye 2000 is much faster than conventional NDT techniques such as dye penetration and magnetic particle testing. The Hawkeye 2000 can virtually be used anywhere that cracking is an issue, including the scanning of both ferrous and nonferrous metals. It can be used on pressure vessels, general vessels, windmill towers, storage tank floors and shells, and bridges.

The Hawkeye 2000 offers real-time data processing, and data can be displayed in horizontal, vertical, and impedance planes. Noise and liftoff can be rotated away from the flaw signal. It offers up to eight (8) channels and a frequency range of 5Hz – 30KHz.

Crack Detection Waveform
Waveform represents a crack detected in a coil weld.

The Hawkeye 2000 has many weld applications, including tube-to-header weld and dissimilar metal weld inspections. It also works on a variety of different types of welds, including butt-welds, lap-welds, and T-welds. For butt welds, no couplant is needed, the Hawkeye offers four inches (101mm) of coverage per pass and inspects both sides of the weld with one pass.

For vessel inspection, the Hawkeye 2000 requires minimal surface preparation and detects cracks, undercuts, porosity, slag, etc.

On surfaces, the Hawkeye 2000 requires minimal preparation and detects surface and sub-surface cracking without coatings.

The Hawkeye detects cracks to a depth of 0.125 or one-eighth-inch (3mm) from the surface in carbon steel, and it covers a swath of up to eight (8) inches (203mm) on a single pass.

Crack Detection Diagram
Diagram shows welds tested and a crack found with BFET.

Hawkeye 2000 variants include:

Single / Multi Channel Hawkeye Scanner

  • Up to 16 channels
  • Detects surface and subsurface cracking to 1/8″ (3mm)
  • Lightweight economical design
  • Scans circumferentially around object

Deep Penetrating Pencil Probe

  • Detects flaws with up to 3/8″ (10mm) liftoff from the surface in carbon steel
  • Scans 1/2″ (12mm) path
  • Compact design
  • Easy to use

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