The AM503S Current Probe System is the most versatile current measurement system available. Since the probes incorporate both a transformer and a Hall Effect device, broadband AC/DC current can be measured simultaneously.  Depending on the probe used, current from DC to 50 MHz and up to 700 A can be measured by clipping the split-core probes around the conductor.  The AM503S is truly a system, consisting of an AM503B Current Probe Amplifier, a TM 502A two-wide Power Module, an A6302 Current Probe and a handy plug-in tool box.  Options enable you to add or substitute an A6303 Current Probe.  Any of the three eight meter XL Current Probes can also be added.