The peculiarity of choosing a Rogowski coil current transformer is that it is not a classic current transformer with a ferromagnetic core. Due to the coreless design, such a coil does not saturate, provides a wide measurement range, high linearity and convenient installation even on large conductors. That is why when choosing, you should pay attention to the range of measured currents, accuracy, type of output signal, compatibility with the integrator and operating conditions. That is why I turned to Yuanxing as a reliable supplier of Rogowski coil current transformer https://yuanxing.net/en/products/rogowski-coil/ . The company offers a wide range of Rogowski coils, including flexible and rigid models, as well as solutions with various output signal options for industrial current measurement and monitoring systems.