ACM20 Series Four-Function AC Power Meters

ACM20 Four-Function AC Power Meter - Now Available at Digi-Key

Murata Power Solutions ACM20 Panel MeterMurata Power Solutions' ACM20 AC power meter displays 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. An optional model displays line frequency with 0.1Hz resolution. All ACM20 multi-function power meters include built-in current transformers - no other user-supplied components are required.    ACM20 Series Datasheet
  • Overview
  • Features
  • Diagram
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ACM20 series AC power meters are available in a choice of two input ranges: 0A to 32A (with 0.01A resolution, 9999 watts maximum) and 0A to 100A (0.1A resolution, 26.4kW maximum). An 85Vac to 264Vac (47-63Hz) operating supply range makes these power meters perfect for worldwide power monitoring applications. Unlike conventional average-responding products, ACM20 power meters accurately display the true-rms voltage and current values of triangle waves, square waves, and other irregularly shaped waveforms with an accuracy of ±1% of full scale.

The large (0.36"/9.2mm), bright red LED display makes ACM20 AC power meters easily readable from as far as 15ft (5m). All units are packaged in a one-piece, vibration resistant, polycarbonate housing that can be installed in vertical '0U' and '1U' rack spaces. 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.

  • Displays AC volts, amps, watts, and power factor
  • User-selectable display modes: continuous auto
    cycling, or fixed reading
  • Universal 85Vac to 264Vac (47Hz to 63Hz) operating range
  • Built-in current transformers simplify installation;
    choice of 32A or 100A ranges
  • Ideal for power distribution units (PDUs) and
    power strips

  • True-rms readings of complex voltage and current waveforms
  • Low-power consumption: less than ¼watt from 120Vac
  • One-piece polycarbonate housing fits '0U' & '1U' racks
  • Surface mount design occupies minimal panel space
  • Bright red LED-display with four annunciators
  • Optional frequency reading models (0.1Hz resolution)

Simplified Schematic Diagram

Murata Power Solutions ACM20 Panel Meter Diagram

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RoHS Compliant
Part Number
Murata Power Solutions
Part Number
Display Digits
Display Face Size
Voltage Supply
2.10" L x 1.43" W (53.3mm x 36.3mm)
85VAC ~ 264VAC