Especially suited for testing using the immersion technique a more reliable detection of the smallest flaws plus the ones near the surface, thanks to an extremely high near field resolution a clear definition of flaws which are close together thanks to the excellent far field resolution. Suitable for all types of probes due to it's large frequency range and the possibility to change from narrow band to wide band amplification (probes not supplied) Simplified flaw evaluation by using the new type of 4 point distance amplitude correction it is also especially suited for testing solid materials owing to it's high transmission power separate evaluation of flaws and backwall echoes with the aid of a double monitor and back wall echo attenuation versatile application of the test results on account of the great number of data outputs higher test speed with automatic testing due to the high pulse repetition frequency simple frequency analysis by blanking of the corresponding echo and a direct possibility of connection a frequency analyser.