At PCE Instruments, you will find a power quality analyzer to measure the power in W, kWh or to analyze and measure harmonics. These are multi-function power analyzers that measure precisely direct current, alternating current, AC-voltage, DC-voltage the intensity of DC or AC, phase rotation and idle, apparent and effective power. The reading of AC power is considered the real value and has a maximum range of 6000 Watts. While a reading is being taken, the polarity changes automatically, if negative values are taken then a minus sign will appear on the device display.