Fluke's 430 series II power quality and energy analyzers offer the best in power quality analysis and introduce, for the first time ever, the ability to monetarily quantify energy losses. The Fluke 434, 435, and 437 series II models 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 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.

• 434-II:
• Energy loss calculator: calculate money lost to energy waste
• Advanced power quality health: at-a-glance power quality health data in real-time
• Power inverter efficiency
• Autotrend: quickly see the trend
• 435-II:
• Troubleshoot real-time using the cursors and zoom tools
• Automatic trending: every measurement is always automatically recorded without any set-up
• Logger function: configure for any test condition with memory for up to 600 parameters at user defined intervals
• Measure all three phases and neutral with included four flexible current probes and enhanced thin flex design
• Powerwave data capture: capture fast RMS data, show half-cycle and waveforms to characterize electrical system dynamics
• Power inverter efficiency: simultaneously measure AC output power and DC input power using optional DC clamp
• Energy loss calculator: classic active and reactive power measurements to pinpoint the energy loss costs
• Highest safety rating in the industry: 600 V CAT IV/1000 V CAT III rated 
• System monitor: ten power quality parameters on one screen according to EN50160 power quality standard
• View graphs and generate reports with included analysis software