Spot Weld Inspection

Tessonics Real-Time Integrated Weld Analyzer

RIWA – is the ultrasonic device capable of measuring a spot weld quality immediately after the weld is produced.


A high frequency ultrasonic transducer is integrated into the welding electrode. This transducer generates ultrasonic waves that pass through the electrode cap into the welded plates. These waves are reflected back and received by the same transducer.

The special software performs analysis and reports the size of the measured weld and its location with respect to the plate surface. Alternatively, the software can display a red, yellow, and green dots for quick weld quality estimation. A welding engineer can easily determine the current weld quality as well as stability of the process from collected statistics.


The installation of the transducer is simple; and it does not affect the cooling water flow. At the present stage of development, the lifetime of the transducer is 3,000,000 welds.



• PC

• Small electronics box

• Ultrasonic transducer connected by the coaxial cable

• The hardware is connected to the robot controller to get synchronizing signal and weld schedule information. The system is passive and

  does not interfere with the production process.

• The device does not need constant supervision and can analyze weld signatures in the auto mode. The system can be plugged into the

  local network to inform the central manager/operator of any problems.

Field of Operation

• Metals:

  - Mild steel

  - High strength

  - Dual phase

• Metal thickness:

  - In the range of 0.8–3.0 mm

• Coatings:

  - Bare

  - Galvanneal

  - Galvanized

• Data storage:

  - Software stores millions of weld records on the hard drive

  - Stored welds can be retrieved for reporting and analysis







Contact us

Contact Details

Address: Unit 5 The Reserve 2 Capricorn Way, Brackenfell

Cape Town, South Africa.

Tel:  +27 (0)73 485 8823