UD3-307EC is the latest and the most modern flaw-detector of “Peleng” series. It is universal instrument, compact and light-weight (1,35 kg), can work in wide temperature range (-25°C … +50°C). It has user-friendly interface, comfortable keyboard, memory for presets and reports, and password protection. Also it can operate as thickness-gauge.



  • "Universal" edition
  • "Oil and Gas" edition
  • "Petrochemistry" edition
  • “Heat power systems” edition
  • “Elevation and Transport” edition
  • "Shipbuilding" edition
  • "Atomics" edition

Flaw-detector mode:

  • frequency range 0,4 … 10 MHz
  • compartible with all transducers;
  • A-scan;
  • B-scan (test piece cross-section display);
  • W-scan (basic beam tracing display for angle beam probe);
  • automatic time-base calibration according to gate length;
  • built-in DGS-graphs allow:
  1. to set necessary sensitivity (by reference side-drilled hole, backwall or concave surface)
  2. to calculate equivalent flaw size
  3. to automatically calibrate the DAC or curved gate
  • custom DGS-graphs programming for special transducers;
  • 3 levels of sensitivity, marked as gates of different colors;
  • flaw positioning and sizing can be automatic or manual;
  • automatic sound velocity set corresponding to chosen material and beam angle;
  • automatic or manual calibration of time-gain (maximum number of time-gain points – 64);
  • test piece curvature correction;
  • sound attenuation evaluation mode;
  • acoustic contact control;
  • 2 independent gates;
  • semiautomatic calibration of distance meter and sensitivity;
  • rectified or radiofrequency signal display;
  • adjustable pulse repetition frequency (20 Hz – 50 kHz)
  • “freeze screen” and “peak” are easy-to-access with one button;
  • DAC-curves;
  • automatic set of probe parameters for “Altek” ‘s probes with built-in memory chip (has no analogs!).



Thickness-gauge mode:

  • indication step: 0,01 mm;
  • minimum measured thickness: 0,8 mm;
  • “zero-backwall” or “backwall-backwall” measurement method;
  • can measure material thickness under coating;
  • A-scan for precise measurement in difficult cases (high attenuation, noise, coatings, etc.).



Eddy-current flaw-detector mode:

  • is used to detect surface and subsurface defects in electroconductive materials (steel, aluminiun titanium, etc.);
  • displayed as “running” scan or complex plane;
  • the scan stops automatically when the probe is away from test piece;
  • dinamic or static mode;
  • reduced influence of the probe inclination on the signal parameters;
  • specal protective caps for easier work on curved surfaces.



Interface features:

  • function keys below the screen, duplicated on the screen;
  • digital keyboard;
  • “one key – one function” principle;
  • automatic recall of last used presets, block of stages and reports;
  • presets can be secured with passwords.


Technical data


 Ultrasonic methods pulse-echo
 Eddy-current methods phase
 Eddy-current modes



 Ultrasonic channels 1
 Eddy-current channels 1
 Main indicator color LCD
 Secondary indicator sound alarm
2 LED's alarm
LED on the eddy-current probe
 Frequency, MHz

0,4; 0,62; 1,25; 1,8; 2,0; 4,0; 2,5; 5,0; 10,0

 Pulser amplitude, V
          high 120
          low 4,5
 Pulse repetition frequency, Hz 20 ... 5000
          Ultrasonic scans А‑scan
          Eddy-current scans “running” scan
complex plane
 Ultrasonic gain range, dB 0 ... 80
 Eddy-current gain range, times 0 ... 80
 Thickness indication step, mm 0,01
 Time-gain range, dB  80
 Eddy-current transducers frequency, kHz
 Eddy-current generator voltage, V 0,8;  1,5;  3,4;  8,3
 Distance meter range (0°, longitudinal wave), mm 1 … 32221
 A-scan time base, ms 1,33 ... 10992
 Measured crack height (eddy-current) 0,1 … 9,9
 Thickness measurement range (steel), mm 3 ... 5000
 Working temperature range, °C -25 … +50
 Weight, kg 1,35
 Dimentions, mm 140x220x42