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Products Infomation
- Products by Category
- Automotive＆EV
- HIOKI PW4001 Power Analyzer
Portable 4-channel power analyzer with ±0.04% basic accuracy for vehicle power measurement
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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.
Features
- 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%.
Basic Specification
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) | |||||
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