Flaw Detector for Ultrasonic Weld Testing

The SONOSCREEN ST10 is ideally suited for all common ultrasonic testing applications. From weld seam inspections and wall thickness measurements to the detection of imperfections such as invisible cracks, inclusions, and blowholes in metals, plastics, ceramics, and composites.”. Even in harsh testing environments, our robust flaw detector works reliably at extreme temperatures from -20 °C to 60 °C.


  • Weld seam testing, e.g. oil and gas industry

  • Inspection of forgings and castings, e.g. railway engineering and engine construction

  • Testing of plastics and composites, e.g. lightweight construction


Industries (Selection)

Oil and Gas Industry

Railway Engineering

Energy Supply


Most Important Functions

Advantages at Glance

  • Powerful rectangular transmitter
  • Robust aluminium housing, protection class IP66
  • High-resolution 8″ display in 16:9 format
  • 2 GB internal memory for up to 60,000 A-scans including device setup
  • Resolution of 5 ns over the entire measuring range

Co-developed by experienced material testers, the SONOSCREEN ST10 Ultrasonic Flaw Detector combines high performance requirements with consistent user orientation. A clear menu structure guides the inspector quickly through all necessary menu points for the preparation of the ultrasonic testing task. A full text menu and an integrated and editable ultrasonic probe database also contribute to efficient testing.

We offer an extensive selection of standard and customized Ultrasonic Transducers for the SONOSCREEN ST10.

General Data

StandardsDIN EN 12668-1, ASTM E1324
Ambient temperature−20 °C ... +60 °C
Display8" color display in 16:9 format; WVGA 800 px x 480 px
Measurement methodsPulse-Echo, Transmit-Receive, Through-Transmission
Size (W x H x D)310 mm x 206 mm x 77 mm
Weight3.000 g
Protection ClassIP66
BatteryInternal Li-Ion battery - operating time: up to 13 hours
Internal Memory2 GB, for screenshots of the A-scan incl. device setup
External MemoryUSB Stick
ReportingScreenshot incl. all parameters (A-scan, measurement context, date and time), save and load setups, material database, probe database, report generator for creating inspection reports (optional)


Pulse ShapeRectangular, unidirectional
Pulse WidthAutomatic, or 20 ns ... 1 000 ns, in steps of 5 ns
Voltage50 V ... 400 V, adjustable in steps of 10 V Pulse Frequency Automatic or manual (low, medium, high, maximum
Pulse FrequencyAutomatic or manual (low, medium, high, maximum)


AmplifierDynamic range: 0 dB to 110 dB Increment: 0; 0.5; 1; 2; 6; 12 dB
RectificationFull-wave; positive/negative half-wave; RF
Noise Reduction0 % ... 80 % of screen height
Amplitude Measurement0 to 125 % of screen height
Filter0.5 1 2 2.25 4 5 10 15 1 ... 5 5 ... 10 10 ... 15 1 ... 20 0.5 ... 20 MHz Adjustment


Measurement Range0.5 mm ... 10 000 mm (steel)
Distance Adjustment/ Probe CalibrationAutomatic 2-point adjustment: calculation of sound velocity and probe delay by use of two adjustment echoes
Resolution0.01 mm in the measuring range up to 10 000 mm (depending on sound velocity)
Sound VelocityAdjustable from 500 m/s ... 15 000 m/s, in steps of 1 m/s or fixed preset values
Measurement Range10 mm to 10 000 mm (up to 20 000 mm with pulse shift)
EvaluationDGS*, DAC* (incl. TCG) or AWS D1.1*
Gate2 independent gates color bars (gate 1: blue, gate 2: green) position and width adjustable over the full measurement range response threshold adjustable from 10 % to 90 % of screen height in steps of 1 %
Connectors2 probe connectors: LEMO 1S Switching output/Analog output*: LEMO 1S Power supply: LEMO 1S 2 USB connectors

Download Flyer

  • Flyer SONOSCREEN ST10 Flaw Detector
    3 MB

Sven Fromm, Managing Director at Clever Marine Services Ltd, about our NDT products

Clever Marine Services Ltd uses SONOWALL 60 from SONOTEC for ultrasonic wall thickness measurements and SONOSCREEN ST10 for weld seam and material testing of ferrous metals. Due to the excellent manufacturing quality, we have chosen SONOTEC ultrasonic testing equipment: the full metal housing of the devices, the measuring accuracy as well as the easy operation of the SONOTEC devices and the very good customer service have convinced us."

Ultrasonic Probes