OWON OWH9811 1 Phase 3–600V / 0–20A RMS power meter
The OWH9811 Digital Power Meter is a professional single-phase 3–600V / 0–20A RMS power measurement instrument designed for accurate analysis of voltage, current, power, efficiency, and harmonics in industrial, laboratory, and R&D environments. With advanced digital processing, harmonic analysis, and full SCPI remote control support, the OWH9811 is ideal for both standalone measurements and automated test systems
Dual-channel power measurement for single-phase equipment
The OWON OWH9811 is a dual-channel benchtop digital power meter for single-phase AC measurements. CH1, on the rear panel, accepts AC voltages from 3 to 600 V RMS and currents up to 20 A RMS, covering the full range of mains-powered single-phase equipment. CH2, on the front panel, adds a second AC/DC channel capable of 0–1000 V peak and 0–20 A — ideal for capturing converter output, DC bus or secondary-side signals simultaneously.
With both channels active, the OWH9811 measures input and output power at the same time, giving direct efficiency readout without a second instrument. Sixteen measurement parameters are displayed simultaneously — including voltage, current, active and apparent power, reactive power, power factor, frequency, crest factors, peak values and total harmonic distortion. Harmonic analysis reaches the 63rd order with a 2.8 kHz bandwidth, and energy integration in Wh and Ah supports consumption and efficiency testing over time. RS232 with SCPI and Modbus connectivity allows full remote control and PC data logging.
Key capabilities
Everything the OWH9800 series brings to the test bench.
Dual-channel design
CH1 (rear) measures AC line power; CH2 (front) adds AC/DC. Both channels active simultaneously for input/output efficiency testing.
16 measurement parameters
V, A, W, VA, var, power factor, frequency, crest factors, peak values and THD — all displayed at once on the 3.95″ TFT.
63rd-order harmonics
Harmonic analysis up to the 63rd order with a 2.8 kHz bandwidth — for THD measurement and compliance pre-screening on non-linear loads.
RS232 · SCPI · Modbus
Standard RS232 interface with SCPI and Modbus protocol support for remote control and PC data logging at baud rates up to 115,200 bps.
Who it’s for & typical applications
- Power-supply and power-electronics engineers testing single-phase switch-mode supplies, adapters and chargers
- Product-compliance labs measuring THD, harmonic distortion and power factor for pre-screening
- R&D teams characterising input vs output efficiency on AC-DC and DC-DC converters
- Switch-mode power supplies and power adapters
- LED drivers and single-phase lighting
- Battery chargers, UPS systems and inverters
- Single-phase motor controllers and AC speed drives
Front & rear panel
CH1 connections are on the rear panel; CH2 is on the front.
OWON OWH9811 — complete specifications
Warm-up >30 min required. CH1 = rear-panel; CH2 = front-panel.
What’s included
The OWH9811 and OWH9813 ship with the essentials to start measuring straight away.
Optional — not included
Your OWON partner in Europe
Genuine OWON instruments, shipped from within the EU with full support and warranty.
EU shipping
Genuine OWON instruments shipped from within the European Union.
Warranty & support
Full manufacturer warranty and technical support from our team.
CE & RoHS
Instruments that meet European safety and compliance standards.
Expert advice
Questions about specs or setup? Our team is here to help.
Questions about the OWON OWH9811?
Ask our team about compatibility, accessories or measurement setup — or browse the full OWH9800 range.
OWON OWH9811 documentation
Official OWON documentation for the OWH9811.