The Fluke I310S AC/DC Current Clamp/BNC, 0.1A-300A AC/DC Switchable is based on Hall-effect technology. This battery-powered clamp measures both AC and DC current. It may be used with ScopeMeters and other suitable recording instruments for accurate, non-intrusive current measurement. This clamp is especially useful for current measurements on inverters, switching power supplies, industrial controllers, automotive diagnostics, and other applications requiring current measurements and/or waveform analysis.