<p>A method is proposed for increasing the signal-to-noise ratio SNR of surface eddy current magnetic permeability meters with orthogonal rectangular coils for a moving strip of ferromagnetic rolled metal. As a result of robust parameter design of the probes, their optimal structures are determined using the design of experiments theory. Specific examples demonstrate the effectiveness of the method, which, in addition to increasing the SNR, also simultaneously reduces variations in the output signal caused by interfering factors. To create a Taguchi design of experiments, a magnetodynamic model of the probe over a moving test object was used along with orthogonal arrays. Numerical computer simulations confirm the reliability of the identified optimal structures of eddy current probes. Using variance ANOVA analysis, the ranks of influence of design and operating parameters on the SNR of probes were established. Based on this, technical requirements for the accuracy of manufacturing their structures and conditions for maintaining the stability of the probe’s operating modes have been formulated.</p>