BK Precision 5331A
Power Clamp Meter, Discontinued

Automatic detection of AC, DC, and AC+DC signals
Accurate power and power factor measurement for distorted waveforms
True RMS
SmartHold™ and Record modes for data analysis
Integrated 3 phase power capability for balanced loads
Peak voltage and current value measurement
Total harmonic distortion, distortion factor, crest factor, and ripple measurement
Optional digital interface and Windows™ software for data logging and Digital waveform output for harmonics analysis