In addition to precise location, there is also a need for reliable sizing of flaws which are just within acceptable limits. In order to evaluate them, the highest echo received by the probe is used. This echo is not only dependent on the structure of the flaw but also quite decisively on certain technical data of the applied probe: Frequency, bandwidth, effective element diameter and impedance must be kept within narrow tolerances so that the signals generated by two probes of the same type from the same reflector are identical.

In order to be quite certain that the Krautkramer probes meet the high requirements of ultrasonic testing, all relevant data for each individual probe is precisely specified with tight tolerances, determined in costly measurements systems and automatically evaluated. The results are stored and available as a basis for the production of data sheets and probe certificates. The certificates include all important data for each individual probe which can also be obtained at any later time under each special probe number. Every probe produced by Krautkramer is subject to the stated measurement and evaluation procedure. Only probes whose measured data are within the pre-specified narrow tolerances, laid down in the acceptance specifications, pass the test and are released for sale. The extensive measurements and the automatic evaluations produce a further advantage. They show the data trend over a large number of production batches. If the control data of the components are included then the tolerances can be continually narrowed. The result: Krautkramer probes are precision tools!