KО 22М UT 001

ОKО-22М-UT ultrasonic flaw detector

Part # NMOKO-22M-UT Categories , ,

The ОКО-22М-UT ultrasonic flaw detector is a standalone electronic unit. It is intended for application in high-performance automated multi-channel NDT Systems, transportable systems (mechanized NDT systems) or for manual testing.

Application of the ОKО-22М-UT ultrasonic flaw detector

It is available in several flaw detector models that differ in the number of channels and in the volume of built-in functions for result processing.

As the flaw detector is designed in a form of a standalone device with the connection to the PC via the Ethernet port, several UT channels can be connected to the PC via the Switch unit. This enables creating UT multi-channel testing systems.


Technical capabilities of the flaw detector allow using it both in online and offline testing systems of stationary type.


Production sector, test object Regulatory Documentation Required number of channels Operating frequency, MHz Testing techniques
Metallurgy, testing the flat rolled steel EN10160, ASTM 578/A578M-96, A435A, ISO 12094 60-100 2-5 Immersion or contact
Metallurgy, testing the rolled round steel bars EN 10308, EN 10228-3, ASTM E – 2375, MS-STD – 2154 3-20 2-10 Immersion or contact, testing velocity is up to 2 m/s
Engineering, testing the pipe welded joints API 5L, API5 CT, EN 10246-17 12 2-5 Immersion or contact, velocity is up to 2 m/s
Engineering, testing the pipe body, thickness gauging API 5L, API5CT, EN 10246, ASTM E1816-96 56 2-5 Immersion or contact, velocity is up to 1 m/s. Resonance-frequency technique for measuring the pipe
wall thickness – from 0.2 to 5.0 mm.

Ultrasonic channel ОКО-22МFigure 1 – UT channel “ОКО-22М”

Structural scheme for connecting the UT channels ОКО-22МFigure 2 – Structural scheme for connecting the UT channels

ОКО-22М-UT application in system for ultrasonic testing of pipe ends,rotary system for testing of tubes, system for immersion testing of cylindrical parts





Pulse mode Spike pulser, Square-Wave pulser
Pulse Voltage (SQ mode) 120-300 V in steps 10 V with tolerance 10%
Pulse falling/rising time 5 ns
Pulse Width (SQ mode) 20 – 500 ns in steps 10 ns with tolerance 10%
PRF (SQ mode) 15 – 2000 Hz in steps 5 Hz, 3 automatic modes: Auto Low, Auto Med, Auto High, Manual
Pulse Voltage (spike mode) Low (100 V), High (400 V)
Pulse energy (spike mode) Low (30 ns), High (100 ns)
PRF (spike mode) 15 – 8000 Hz in steps 5 Hz, 3 automatic adjustment modes: Auto Low, Auto Med, Auto High, Manual
Damping 50, 62, 150, 400


Gain 0 to 110 dB adjustable in steps of 0.2, 0.5, 1, 2 dB
Receiver input impedance 400Ω±5%
Receiver bandwidth 0.2-27 MHz (- 3 dB)
Digital filter setting Eight digital filter sets standard (0.2-10 MHz; 2.0-21.5 MHz; 8.0-26.5 MHz; 0.5-4 MHz;
5-15 MHz; 5-15 MHz; DC-10 MHz )
Rectification Fullwave, positive halfwave, negative halfwave, RF
Amplitude measurement 0-110%
Reject 0-80% FSH
Units Millimeters, inch or microseconds
Range 1 to 6000 mm
Velocity range 1000 to 10000 m/s in steps of 1, 10, 100, 1000 m/s
Thickness measurements range 0.6 to 6000 mm
Probe angle 00 to 900 in steps 0.10, 1.00, 100


ADC 10 – bits with the sampling rate 100 MHz
A-Scan buffer 8 KB


Measurements gates
  • 2 fully independent three-level gates for amplitude and time of flight measurement.
  • Additional gate for acoustic coupling control.
  • Additional gate for immersion control.
  • Special-purpose gate of the Automatic gain control (AGC).
Start Gate Variable over entire range
Width Gate Variable over entire range
Gate height Variable from 2 to 100% FSH


Result display A-scan, B-scan, C-scan, D-scan, TOFD scan
  • Dynamic range is up to 110 dB.
  • Number of points is 32.
  • Building TCG curve by DAC
  • Automatic building of up to 3 curves for different equivalent diameters
  • Calibration at calibration blocks and testing objects
  • Building TCG curve by DGS


Probe connector 2 BNC or 2 Lemo 1S
USB port USB-2.0
Ethernet +
Alarm output +
Encoder 1 Lemo (with the option of two encoders operation)
Login to NOMO

NOMO Deals

Get the best offers in NDT products.