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Accurate enough for lab use, and rugged and portable enough to take anywhere
  • Best-performing industrial heat sources (accuracy, stability, uniformity) in the world
  • Immersion depth to 203 mm (8 in)
  • Optional ITS-90 reference input reads PRTs to ±0.006 °C
  • Temperature range from –45 °C to 700 °C


Analyze power quality issues, calculate the costs of wasted energy and prevent downtime with the Fluke 434-II Energy Analyzer and Fluke 435-II Power Quality and Energy Analyzer.
  • Advanced power quality health—At-a-glance power quality health data in real time so you can make better maintenance decisions
  • Energy loss calculator—Discover the costs of energy loss specifically caused by poor power quality
  • Highest safety rating in industry—CAT III 1000 V / CAT IV 600 V


  • EASY SETUP
    • Quickly create asset list and work order on your PC, setup machine profiles using Fluke Connect App on your smart device, push routes to your 805 FC for your technicians in the field.
  • CONSISTENT DATA QUALITY
    • Take accurate, reliable measurements at both low and high frequency ranges
  • MOBILE DATA ACCESS
    • Store results in the cloud and share data with your team remotely
  • INNOVATIVE SENSOR DESIGN
    • Minimize measurement variations caused by device angle or contact pressure


  • Voltage detection from 90 to 1000 V AC, suitable for a wide range of residential, commercial and industrial needs
  • Always on, using special low power circuitry to sustain battery life and ensure your 2AC is always ready
  • Innovative 'Battery Check' button function ensures battery is in good condition*
  • CAT IV 1000 V overvoltage rated product for best in class user protection
  • Expanded range: 90 V AC to 1000 V AC
  • Integrated clip design, optimized for pocket storage
  • Powered by 2x AAA batteries (included)
  • Fluke ruggedness and reliability
  • Two-year warranty
* Use of Battery Check function is optional and for convenience only, it is not intended as a substitute for checking the unit on a known live source before and after use.


  • True-RMS digital multimeter with the features professional technicians prefer
  • Increases productivity with manual and automatic ranging, Display Hold, Auto Hold, and Min/Max-average recording
  • Measures AC and DC voltage to 1000 V
  • Delivers accurate True-RMS AC current and voltage plus frequency, capacitance, resistance, continuity and diode measurements
  • Safety rated CAT III 1000 V, CAT IV 600 V