Sonel S.A. engages in the production and sale of electronic measuring instruments in Poland. The company offers electrical safety measurements, including multifunctional installation, insulation resistance, earth ground, loop impedance, RCD, PV installation, and EV charging station testers; and power quality analysis, safety of electrical equipment, low resistance measurements, and thermal imagers and pyrometers products, as well as instruments for detecting cables, conductors, and pipes in various environments.