YOKOGAWA WT310/WT332/WT333 Digital Power Meter (WT300 series, discontinued by the manufacturer) | Replacement: WT300E series

YOKOGAWA WT300 Series Digital Power Meter (Discontinued) and Replacement WT300E

Overview

The WT300 series (WT310 single-phase, WT310HC high-current, WT332 two-element, WT333 three-element) are compact YOKOGAWA digital power meters. The manufacturer discontinued them on 2016-03-15; the replacement is the WT300E series. The original WT300 specifications are kept below for existing users; for new purchases please inquire about the WT300E.

Key Specifications

• Status: Discontinued by the manufacturer (2016-03-15)
• WT300 basic accuracy: 0.1% of rdg + 0.1% of rng (50/60 Hz); DC 0.1% of rdg + 0.2% of rng
• WT300 bandwidth and input: DC, 0.5 Hz–100 kHz; up to 600 V, 20 A (WT310HC 40 A); WT310 minimum range 5 mA
• WT300 other: Data update as fast as 100 ms; optional harmonic measurement (/G5, up to 50th order); USB, GP-IB or RS-232, optional Ethernet
• Replacement WT300E: WT310E, WT310EH (40 A direct input), WT332E, WT333E; basic power accuracy ±0.15% (50/60 Hz); DC, 0.1 Hz–100 kHz (WT310EH up to 20 kHz)

Applications

• Standby power (IEC 62301) and energy efficiency testing of home appliances.
• Power measurement of power supplies, motor drives and lighting.

Specifications per the YOKOGAWA WT300 discontinuation notice page and the WT300E catalog Bulletin WT300E-01EN (retrieved 2026-10-22).