The Fluke i400s is compatible with any instrument capable of AC millivolt measurements. It can accept a standard BNC connector, and has an input impedance of greater than or equal to 1 M? in parallel with a maximum of 47pF.The Current Clamp can also be used with digital multimeters using a BNC-to-banana jack adapter.Fluke i400s features:Companion to your scope or power quality meter to measure up to 400 A AC.Only current clamp available with a CAT IV 600 V / CAT III 1000 V safety rating.Specially designed to offer maximum utility in a compact shape.Take accurate current readings without breaking the circuit.Soft non-slippery overmold handle.Optional PM9081/001 BNC/Banana adapter for DMM's.Two ranges: 40 A & 400 A, 10 & 1 mV/Amp output.Max. conductor ? 32 mm.