HIOKI PW4001 Power Analyzer

Type: Power Analyzer

Supplier / Manufacturer: HIOKI

Model: PW4001

Industries & Applications:

Automotive EV & Battery R&D Production Testing Quality Control Field Measurement

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Portable 4-channel power analyzer with ±0.04% basic accuracy for vehicle power measurement

U.S.-based sales, and delivery available. The Hioki PW4001 is a portable, high-precision 4-channel power analyzer that achieves the company’s highest-ever DC accuracy of ±0.04%. With a wide frequency bandwidth from DC to 600 kHz, it delivers reliable, high-speed measurement for motors, inverters, and EV systems. Despite its compact, field-ready design, it provides laboratory-grade precision, auto phase-shift correction for Hioki current sensors, and CAN/CAN FD input/output, making it ideal for R&D, production testing, and vehicle power analysis.

Lab-grade precision, Field-ready

From xEV fuel and energy consumption testing to DC-DC converter and inverter efficiency evaluation, as well as motor efficiency analysis, the PW4001 provides exceptional reliability and versatility, making it a new-generation portable power analyzer designed for a wide range of measurement scenarios.

Engineered for the tasks you face, wherever you work

- Capture transient power changes with high precision Evaluate motor and inverter efficiency with 1 ms data updates and 600 kHz bandwidth. Even transient power losses are measured accurately. ・Capture motor power fluctuations with millisecond precision ・Evaluate efficiency for high-frequency inverters ・Automatically detect charge and regeneration to calculate efficiency

Reduce setup time in drive range testing

Ensure accurate measurements even at -7°C. With direct CAN voltage input and flexible, vehicle-side installation, test setup is faster and safer. ・Accuracy maintained at -7°C. Install directly in cold chambers ・Use a compact setup near the vehicle and expand channels with synced units ・Acquire battery voltage via CAN, safe and simple

Use it on the road Designed for real-world driving tests

Measure power without vehicle modification. OBD-II input and 10.5 V to 28 V DC power supply make in-vehicle use easy. ・Operates from −20°C to +50°C, ready for harsh environments ・Run on DC power for easy in-vehicle installation ・Use OBD-II CAN bus for safe, real-time vehicle data acquisition

Ensure production quality with waveforms and numbers

Combining waveforms and numerical values ensures reliable, quantifiable quality in mass production. ・Verify efficiency with ±0.04% accuracy at DC and 50 Hz/60 Hz ・Direct voltage input up to 1500 V DC ・2.5 MHz sampling enables waveform evaluation of switching events

Half the Size, Maximum Precision

The slim design clamp current sensor ensures easy installation even in tight spaces. Complex tasks in the engine room become simple and efficient, dramatically reducing preparation time for fuel efficiency and performance testing. Not only does it reduce setup time, but it also minimizes the risk of sensor damage from forced clamping between narrow spaces. Fully compliant with the WLTP and SAE J1634 standards, it provides precise AC/DC current measurements up to 200 A with an impressive DC accuracy of 0.07%.

Accuracy guaranteed for 6 months, multiply the 6-month accuracy by 1.5 to obtain the 1-year accuracy.

Measurement lines	Single-phase 2-wire, single-phase 3-wire, three-phase 3-wire, three-phase 4-wire
Number of channels	4 (4 voltage, 4 current, isolated between each channel)
Measurement frequency bandwidth	DC, 0.1 Hz to 600 kHz
Sampling	16 bit, 2.5 MHz
Data update rate	1 ms, 10 ms, 50 ms, 200 ms
Accuracy for power	DC, 50/60 Hz: ±0.03 % reading ± 0.01 % range / 50 kHz: ±0.40 % reading ± 0.10 % range
Voltage measurement range	6 V, 15 V, 30 V, 60 V, 150 V, 300 V, 600 V, 1500 V
Current measurement range	40 mA to 2000 A (depends on current sensor)
Measurement parameters	Voltage (U), current (I), active power (P), apparent power (S), reactive power (Q), power factor (λ), phase angle (φ), voltage frequency (fU), current frequency (fI), efficiency (η), loss (Loss), voltage ripple factor (Urf), current ripple factor (Irf), current integration (Ih), power integration (WP), voltage peak (Upk), current peak (Ipk)
Harmonic measurement	Wideband mode: max. analysis order of 500th
Waveform recording	Recording capacity: up to 5 mega-words for any waveform (current, voltage, motor)
Motor analysis (option)	Voltage, torque, RPM, frequency, slip, motor-power power spectrum analysis
Calculation function	Efficiency-loss calculations, user-defined formula, delta conversion, current sensor automatic phase shift compensation
External interface	USB flash drive, LAN, USB (function), external control, BNC sync., CAN or CAN FD
Power supplies	100 V to 240 V AC, 10.5 V to 28 V DC
Dimensions and weight	361 (W) × 176 (H) × 135 (D) mm (14.21 × 6.93 × 5.31 in), 4.6 kg (162.3 oz.)
Included accessories	Startup guide ×1, power cord ×1, USB cable ×1, D-sub connector ×1 (PW4001-02, PW4001-05), DC power supply connector (PW4001-04, -05)