The HIOKI PW3337 is a 3-channel bench-type high-precision AC/DC power meter, uniquely supporting 3-phase 4-wire measurement among the PW3336/3337 series, compliant with IEC61000-4-7 harmonic standard with built-in up to 50th-order harmonic analysis.

Frequency coverage spans DC, 0.1 Hz ~ 100 kHz, suitable for low-speed motor carrier frequency and switching power supply ripple measurement. Direct input supports up to 1000 V AC/DC, 2 mA ~ 65 A; external CT sensors extend measurement to max 5000 A AC.

Basic active power accuracy reaches ±0.15% reading, maintains high precision even at extremely low power factor, ideal for transformer no-load loss testing. It supports long-term energy integration up to 10,000 hours, 6-digit readout for power and charge.

Multi-unit synchronous connection: up to 8 PW3337 can be linked for multi-device testing, two units combined realize 6-channel measurement. Standard LAN & RS232C; optional GP-IB, 16-channel D/A analog output for automated test system integration.