KО 22М UT 001

ОKО-22М-UT ultrasonic flaw detector

Part # NMOKO-22M-UT Categories , ,

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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.

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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 objectRegulatory DocumentationRequired number of channelsOperating frequency, MHzTesting techniques
Metallurgy, testing the flat rolled steelEN10160, ASTM 578/A578M-96, A435A, ISO 1209460-1002-5Immersion or contact
Metallurgy, testing the rolled round steel barsEN 10308, EN 10228-3, ASTM E – 2375, MS-STD – 21543-202-10Immersion or contact, testing velocity is up to 2 m/s
Engineering, testing the pipe welded jointsAPI 5L, API5 CT, EN 10246-17122-5Immersion or contact, velocity is up to 2 m/s
Engineering, testing the pipe body, thickness gaugingAPI 5L, API5CT, EN 10246, ASTM E1816-96562-5Immersion 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 modeSpike pulser, Square-Wave pulser
Pulse Voltage (SQ mode)120-300 V in steps 10 V with tolerance 10%
Pulse falling/rising time5 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
Damping50, 62, 150, 400


Gain0 to 110 dB adjustable in steps of 0.2, 0.5, 1, 2 dB
Receiver input impedance400Ω±5%
Receiver bandwidth0.2-27 MHz (- 3 dB)
Digital filter settingEight 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 )
RectificationFullwave, positive halfwave, negative halfwave, RF
Amplitude measurement0-110%
Reject0-80% FSH
UnitsMillimeters, inch or microseconds
Range1 to 6000 mm
Velocity range1000 to 10000 m/s in steps of 1, 10, 100, 1000 m/s
Thickness measurements range0.6 to 6000 mm
Probe angle00 to 900 in steps 0.10, 1.00, 100


ADC10 – bits with the sampling rate 100 MHz
A-Scan buffer8 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 GateVariable over entire range
Width GateVariable over entire range
Gate heightVariable from 2 to 100% FSH


Result displayA-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 connector2 BNC or 2 Lemo 1S
USB portUSB-2.0
Alarm output+
Encoder1 Lemo (with the option of two encoders operation)
This product has no accessories.
This product does not have software options.
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