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. At the present stage of development, the lifetime of the transducer is 3,000,000 welds.