Using the experience installing over 1000 LV monitoring systems using a variety of sensors types, the GridKey team specified a sensor specifically for retrofit installations. The SlimSensor works on the same principle as a Rogowski (providing a dI/dT output) however does not suffer from the accuracy issues (cross feed from adjacent conductors and positional accuracy of conductor within sensor aperture) typical rope Rogowski sensors suffer from. The sensor is flexible and can be installed single-handed if required due to space constraints.