"ACM20 series AC power meters display the most critical measurements in mains-powered equipment: voltage, amperage, active power (watts), and power factor. A front panel selector-switch provides two modes of operation: a fixed reading of any of the four parameters, or a continuous cycling through all four measurements. Their miniature size is perfect for UPS power sources, power strips, laboratory instrumentation, alternative energy applications, and any other products that require precise monitoring of AC power.Four-Function AC Power Meters. Large 9.2mm bright red LED display. Displays AC Volts, Amps, Watts, and Power Factor or Hertz. Two display modes: continuous auto cycling or fixed. True-RMS readings of complex voltage and current waveforms. Different versions available:. - 10A, Power Factor Reading, stock-no. 823-3595. - 32A, Power Factor Reading, stock-no. 823-3586. - 100A, Power Factor Reading, stock-no. 823-3592. - 10A, Frequency Reading, stock-no. 823-3598. - 32A, Frequency Reading, stock-no. 823-3589. - 100A, Frequency Reading, stock-no. 823-3602. Built-in current transformers for an easy installation. Universal 85-264Vac (47-63Hz) operating range. One-piece polycarbonate housing fits 0U and 1U racks. Surface mount design occupies minimal panel spaceCutout Height = 22.1mmCutout Width = 36.22mmDisplay Type = LEDNumber of Digits = 4Number of Phases = 1Depth = 23.11mmDigit Height = 9.14 mmMeter Accuracy = ±1 %Minimum Temperature = 0°CMaximum Temperature = +60"