SPEAG has pioneered the research and development of EM probes. All probes have been optimized using full wave 3D simulations to achieve maximum spherical isotropy by avoiding or compensating any field distortion from mounting materials. Special techniques have been developed to minimize secondary modes of reception. Only the best low-loss materials are used, making the probes very rigid and compatible almost any media. SPEAG has also pioneered the calibration techniques enabling the most precise measurement of electric, magnetic, dosimetric and temperature quantities.