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How to Choose an Ultrasonic Flaw Detector

March 31, 2026

Latest company news about How to Choose an Ultrasonic Flaw Detector
1. Choose Between Conventional UT & Phased Array (PAUT)
  • Conventional Ultrasonic Flaw Detector Suitable for welds, forgings, steel plates, pipes, bolts and shafts.

    Affordable, durable, easy to operate, ideal for field use.

  • Phased Array Ultrasonic Flaw Detector (PAUT) Suitable for pressure vessels, pipeline welds, wind power, nuclear power, aerospace and complex workpieces.

    Intuitive imaging, accurate positioning, efficient, supports data recording and formal reports.

2. Select According to Testing Objects
  • Welds Thin plates (<10mm): high-resolution, high-frequency instruments.

    Medium thickness (10–100mm): general-purpose models.

    Thick plates (>100mm): high-power, high-penetration instruments.

  • Forgings, shafts and bars Requires clear bottom echo, high sensitivity and low noise.

    Must support DAC/TCG functions.

  • Castings & coarse-grained materials High noise and high attenuation.

    Choose low-frequency (0.5–2MHz), high-power instruments with strong filtering.

  • Thin plates, aluminum & stainless steel High-resolution, high-frequency (above 5MHz), narrow-pulse instruments.
3. Key Specifications & Functions
  • Frequency range: 0.5–15MHz (common)
  • Testing range: 0–6000mm
  • Essential functions: DAC/AVG curve, TCG (Time Corrected Gain), data storage, report export
  • Field use: IP65 or above, sunlight-readable display, long battery life
4. Probe Matching
  • Welds: angle beam probes (45°, 60°, 70°)
  • Plates & forgings: straight beam probes
  • Small-diameter pipes: dedicated small wedges or phased array probes
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