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ОKО-22М-UT Ultrasonic Multi-Channel Flaw Detector

Ultrasonic flaw detector ОKО-22М-UT Ultrasonic flaw detector ОKО-22М-UT

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

Technical capabilities of the flaw detector allow to use it both in stationary-type in-line and off-line testing systems.


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.


Figure 1 – UT channel "ОКО-22М"

Figure 2 - Structural scheme for connecting the UT channels


Parameter OKO-22M-UT Standart OKO-22M-UT StandartMX OKO-22M-UT PRO
Pulse mode Spike pulser 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 – 100000 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 0°to 90°in steps 0.1°, 1.0°, 10°
Digital cpecification
ADC 10 – bits with the sampling rate 100 MHz
A-Scan buffer Raw data 8 KB
Measurements gates
  • 2 fully independent three-level gates for amplitude and TOFmeasurement.
  • 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
Measurement specification
Result display A-scan, B-scan, C-scan, D-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
Number channels 1 up to 8 1
Probe connector 2 BNC or 2 Lemo 1S BNC 2 BNC or 2 Lemo 1S
USB port   USB-2.0
Ethernet +
WI-FI   antenna plug in

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