Lightweight, hollow-coil sensor precludes overheating even when sensing large currents Even flexible enough for complicated wiring 10Hz to 20kHz Phase: 45Hz to 66Hz AC 500/5000A rated input AC 500mV f.s. output f 254mm (10.0in) diameter Compatible with the Hioki 3196 Power Quality Analyzer, 3169 Clamp-on Power HiTester, & 8860-50 Memory HiCorder Oscilloscope/Datalogger