Fluke 438 Series 2 Power Quality & Motor Analyser

Product Summary

The Fluke 438‑II is a combined power quality and motor performance analyser designed for technicians who need to diagnose electrical issues and assess motor mechanical health without using mechanical sensors. It measures voltage, current, harmonics, unbalance, power, and energy while simultaneously calculating motor torque, efficiency, speed, and mechanical power. Ideal for industrial plants, mining, utilities, and facilities where both electrical and mechanical motor performance matter.

Core Specifications

• Voltage: 1‑phase & 3‑phase, up to 1000 V
• Current: Up to 6000 A (with compatible clamps)
• Power: kW, kVA, kVAR, PF, energy
• Harmonics: Up to 50th order
• Motor Measurements:
  • Mechanical power (HP/kW)
  • Torque
  • Efficiency
  • Speed (RPM)
• Unbalance: Voltage & current unbalance analysis
• Inrush Current: Yes
• Logging: Long‑term power quality and motor performance trends
• Safety Rating: CAT IV 600 V / CAT III 1000 V
• Special Features:
  • Motor analysis without mechanical sensors
  • Full Class A power quality measurement
  • Colour display with waveform & phasor diagrams
  • USB data export

Recommended Pairings

• Fluke i430‑Flex Current Probes — essential for 3‑phase and high‑current motor systems.
• Fluke 1738 Power Logger — for long‑term energy and PQ studies alongside motor analysis.
• Fluke 87V Industrial Multimeter — for fast electrical troubleshooting before deeper PQ testing.
• Fluke 805 Vibration Meter — complements motor electrical analysis with mechanical vibration checks.

Hiring with Measurements101
Booking is simple: select your dates, choose your equipment, and check out. Once your order is placed, we’ll be in touch within the hour to organise delivery.
Not sure if this is the right tester for your job? Give us a call anytime — we’re always happy to help you get the right tool.

*Specifications are indicative only and may vary in practice. Please confirm suitability for your application.*