CR Magnetics CR4211S-50 Split Core Self Powered AC Current Transducer with Single Element, 20 - 100 Hz, &gt;= 1M  Output Load, 2500 VDC, 0-50 AAC Input Range, 0 - 5 VDC Output Range Average RMS measurement for sinusoidal alternating current waveforms 0.5% accuracy Response time of 100 ms (10-90% step change) DIN rail or panel mounting options CE certified for quality assurance