Fluke 381 current clamp with iflex current probe fluke fluke 381 the new fluke 381 true rms ac dc clamp meter lets you remove the display for extra flexibility allowing one technician to do jobs that used to require two clamp the fluke 381 around a conductor remove the display module and walk across the room to operate controls or remove protective equipment all while watching real time readings wireless technology allows the display module to be carried up to 10m away from the point of