Systems and methods for measuring currents in bundled conductors. A frame holding a number of sensors is used. The geometric and electrical parameters of the sensors in the frame are known or previously determined. The frame is then deployed to substantially encircle at least part of the bundled conductors. The magnetic fields produced by the current in the bundled conductors are then sensed by the sensors. The sensed magnetic fields are then turned into relevant data. The relevant data, in conjunction with the geometric and electrical properties of the sensors are then used to calculate and estimate the current in each of the bundled conductors. The parameters of the sensors may be determined during the assembly or manufacture of the frame and the sensors.