DC, 0.5 Hz To 1 MHz, 6-Channel 3-Phase 4-Wire Power Meter with Direct and Clamp Sensor Input Hioki benchtop power meters and power analyzers are best in class power measuring instruments for measuring single to three-phase lines with a high degree of precision and accuracy. The 3193-10 is a 6-channel power meter for testing any type of circuit ranging from single-phase lines to three-phase four-wire lines. Based on the voltage, current, and active power measurements, the power meter calculates and displays reactive power, apparent power, power factor, phase angle, and efficiency. It also provides a wide range of measurement functions including frequency measurement function, peak measurement function, current integration, active power integration, analog outputs, monitor outputs, and optional harmonic analysis/flicker functionality. Note: Main unit 3193-10 cannot operate alone - please purchase an input unit Model 9600 to 9605 for factory installation prior to shipment. All subsequent input unit replacements or expansions must be conducted at HIOKI for an additional service charge.