The ULNRC series is a new generation of flexible Rogowski coil (Rogowski® coil) current sensors, which are especially suitable for measuring in combination with portable devices. ULNRC coils have different sizes to cope with different conductors. The new generation of ULNRC coil strengthens the shielding layer and greatly reduces the influence of external magnetic fields; it can be directly connected to our rail-mounted and panel-type meters without the need for external integrators. ULNRC series coils have IP68 protection grade and UL certificate, which is extremely suitable for indoor use.