Eliminate the Risk of Short-Circuits and Electrical
Hioki Clamp On Power Meters are multi-channel power measuring devices
utilizing clamp sensor input to accurately and safely measure power on
single-phase to three-phase lines. The PW3365 power logger takes safety
and convenience one step further by being the world’s first non-metallic
contact power meter that utilizes completely covered voltage clips that
can be attached to any part of a cable or busbar. Customers can now
monitor power demand and other power parameters to aid in energy audits
and validate energy saving measures without risk of short-circuit
accidents, power interruptions, or bodily injury due to electrocutions.

Model No. (Order Code)

PW3365-20English model, main unit only

Note: Clamp On Power Logger PW3365 by itself does not support current
and power measurements. Current and power measurements require
clamp on sensors, sold separately. Use only HIOKI SD cards
guaranteed to work for saving measurement data (options, sold separately).
Select from Value Kits for added savings.

Key Features

• Voltage measurement from the top of the cable, zero risk of short circuit
• Supports single to three-phase, 4-wire circuits
• Measure between 90V to 520V
• Slim, compact design that can be placed anywhere
• Store months of data on SD cards
• The QUICK SET function guides you in making the right connections
• WHM (watt-hour meter) connection checking function installed


• German Design Award Special 2016 (*For Voltage Sensor PW9020)
• 2015 The Nikkan Kogyo Shimbun MACHINE DESIGN AWARD Distinctive Merit Award (* For PW3365)

Product Video

Safely and easily measure power without the need to shut off the circuit breaker first with a clamp-on power logger

Although technicians had to connect instruments to metal terminals in order to measure
voltage when measuring power in the past, Hioki’s newly developed no-metal-contact
voltage sensor makes it possible to measure voltage simply by clamping the sensor
around an insulated wire. This approach completely eliminates the risk of short-circuits
since metal never comes into contact with live components, and it simplifies the sensor
attachment process even when terminals are covered since the sensor can be simply
clipped around the cable without removing the cover.

Harmonic Testing | Analyze from the fundamental wave up to the 13th order with the PW3365 Clamp On Power Logger (from version 2.00)

Use the Hioki PW3365 Clamp On Power Logger to analyze the fundamental waveform up
to the 13th order of harmonic components that are included in the voltage and current
signals of 50/60Hz power lines. Display the total harmonic distortion (THD) and RMS
and harmonic content of each harmonic order as a numerical list or graph. In
particular, you can now safely and easily measure the 5th and 7th harmonic within
the harmonic component which tend to have the greatest impact on power quality.

Graphical, easy-to-understand guidance on how to connect the clamp-on power logger

The PW3365’s Quick Setup feature guides you through the process of setting up the
instrument for measurement, right up to starting measurement, to make even 3-phase
power measurement a breeze. Since any mistaken connections will trigger a FAIL
message, the feature also helps prevent measurement mistakes.


Display clamp-on power logger measurement results as a graph so you can review them at a glance

The PW3365 displays recorded measured values as a graph for convenient use in power
management. In addition to instantaneous measured values, you can review maximum,
minimum, and average values by moving the cursor on the demand and trend graph


Get results from the job site in real-time, GENNECT CROSS SF4000

Capture data on the PC while testing remotely

Learn more

Basic specifications (Accuracy guaranteed for 1 year, Post-adjustment accuracy guaranteed for 1 year)

Measurement line & number of circuits50/60 Hz, Single phase 2 wires (1/2/3 circuits), Single phase 3 wires (1 circuit), Three phases 3 wires (1 circuit), Three phases 4 wires (1 circuit), Current only: 1 to 3 channels
Measurement itemsVoltage RMS, current RMS, voltage fundamental wave value, current fundamental wave value, voltage fundamental wave phase angle, current fundamental wave phase angle, frequency (U1), voltage waveform peak (absolute value), current waveform peak (absolute value), active power, reactive power, apparent power, power factor (with lag/lead display) or displacement power factor (with lag/lead display), active energy (consumption, regeneration), reactive energy (lag, lead), energy cost display, active power demand quantity (consumption, regeneration), reactive power demand quantity (lag, lead), active power demand value (consumption, regeneration), reactive power demand value (lag, lead), power factor demand
Voltage ranges400 V AC (Effective measurement range: 90.0 V to 520.0 V)
HarmonicHarmonic voltage, harmonic current, voltage total harmonic distortion (THD-F or THD-R), current total harmonic distortion (THD-F or TDH-R), up to 13th order
Current ranges500.00 mA to 5.0000 kA AC (depends on current sensor in use),
50.000 mA to 5.0000 A AC (Leak clamp on sensor only)
Power ranges200.00 W to 6.0000 MW (depends on voltage/current combination and measured line type)
Basic accuracyVoltage : ±1.5% rdg. ±0.2% f.s(combined accuracy with PW3365-20 + PW9020)
Current : ±0.3% rdg. ±0.1% f.s. + clamp sensor accuracy
Active power : ±2.0% rdg. ±0.3% f.s. + clamp sensor accuracy (at power factor = 1)
Display update rate0.5 sec (except when accessing SD card or internal memory, or during LAN/USB communication)
Save destinationSD/SDHC Memory card, or internal memory at real time
Data save interval1 sec to 30 sec, 1 minute to 60 minutes, 14 selections
Save itemsMeasurement value save: Average only / Average, Maximum, Minimum value
Screen copy: BMP form (saved every 5 min. at minimum interval time)
Waveform save: Binary waveform data
InterfacesSD/SDHC memory card, LAN 100BASE-TX: HTTP server function, remote settings via communication program, data download, USB 2.0: When connected to a PC, the SD Card and internal memory are recognized as removable storage devices, remote settings via communication program, data download
FunctionsConnection check, Quick Set navigation guide, clock
Power supplyAC adapter Z1008: (100 to 240 V AC, 50/60 Hz), 45 VA (including AC adapter)
Battery pack 9459: (DC 7.2 V, 3 VA, charging time 6 hr 10 m), 5 hours of continuous use (with back light off)
Dimensions and mass180 mm (7.09 in)W × 100 mm (3.94 in)H × 48 mm (1.89 in)D, 540 g (19 oz) without PW9002
180 mm (7.09 in)W × 100 mm (3.94 in)H × 68 mm (2.68 in)D, 820 g (28.9 oz) with PW9002
AccessoriesSafety Voltage Sensor PW9020 ×1 set, AC adapter Z1008 ×1, USB cable ×1, Instruction manual ×1, Measurement guide ×1, Color clip (red, yellow, blue and white each 4), Spiral tubes in black (cord bundling for current sensors and voltage sensors) ×10
Catalog: CLAMP ON POWER LOGGER PW3365Download PDF  [8MB]English
Catalog: GENNECT CROSS SF4000Download PDF  [1MB]English

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