The Fluke 430 Series II Power Quality and Energy Analysers offer the best in power quality analysis and have the functionality to monetarily quantify energy losses.  These products help locate, predict, prevent, and troubleshoot power quality problems in three-phase and single-phase power distribution systems.  Additionally, the Fluke-patented energy loss algorithm, Unified Power Measurement, measures and quantifies energy losses due to harmonics and unbalance issues, allowing the user to pinpoint the origin of energy waste within a system.
Please note that the Fluke 434 is no longer available.