Power Master Unit Software | Elster Metering Systems

Note: Elster Metering is now part of . Some legacy software references may still be under the Elster brand. What is the Power Master Unit (PMU)? The Elster Power Master Unit is a hardware device (typically a ruggedized rack-mount or panel-mount computer) used as a Data Concentrator or Gateway in advanced metering infrastructure (AMI) for electricity, gas, and water utilities.