Flaw Detector for Ultrasonic Testing of Welds and Rails – UD3-71

The UD3-71 ultrasonic flaw detector has been designed for the testing of welded rail joints with a set of manual probes and USR-01 scanner (Tandem Rig):

It is used for re-testing of different types of rails laid down in a track and to carry out the before welding testing of end sections of new and used welded joints and rails.

The Flaw Detector Advantages

  • Compact and light weight (0.9 Kg)
  • High brightness color TFT display
  • Special test rig for tandem testing technique
  • Direct digital display of depth and distance of flaws
  • Internal memory (Micro SD card 8 Gb) for saving the testing results and testing setups


Parameters Value
Test Range 1- 6000 mm
Velocity 1000 – 15000 m/s in steps 1, 10,100,1000 m/s
Angle probe 0 – 90 0
Delay 0 – 9999 mm depending on the set PRF value
Gain 0-100 dB in steps 0.1, 0.5, 1, 10
Rejection 0 – 80% FSH
Rectification Full wave, positive half wave, negative half wave, RF
Receiver bandwidth 0.4-20 MHz (- 3 dB)
Digital Frequency 0.4, 1, 1.25, 2, 2.5, 3, 4, 5, 6, 7, 8, 10, 15 MHz
Test Modes Pulse echo and transmit/receive.
Connectors BNC
Measurement Gates • 2 fully independent three-level gates for amplitude and TOFD measurement
• Special gate of Automatic gain control (AGC)
Result display A-scan, B-scan, simultaneous of up to 5 measured parameters selected by the user
DAC/TCG • Number of points is 32
• Building TCG curve by DAC
DGS • Automatic building of curve for different equivalent diameters
• Calibration at calibration blocks and testing objects
• Building DGS curve by DAC
Internal memory Micro SD card 8 Gb is used for saving the testing setups and testing results
Tandem Technique Special Test-Rig for tandem technique is provided for the Rail weld joint examination.
Probe Complete set of probes are provided for the Rail weld examination.
Display dimension (WxH, diagonal) 70 mm x 50 mm
Weight 0.8 kg
Overall dimensions (HxWxL) 200x100x110 mm


Other Equipment by this Supplier