Phase Rotation Meter with Easy-to-Read Arrow and Non-Metallic Contact Clips for 70V to 1000V Lines
Hioki’s non-contact voltage detection and measurement technology places
efficiency and safety as priority considerations with the goal of
protecting customers that need to conduct on-site electrical work
as part of renovations and expansions of manufacturing plants and
buildings. Model PD3129-10 is a non-contact phase rotation meter
that detects the phase of electrical current flow within insulated
wires without using metallic contact voltage clips. The green arrow
indicates normal phase, which can be useful for visual reports that
document the proper completion of electrical work.

Model No. (Order Code)

PD3129-10Large clips


A comment of Good Design Award 2016
“I was impressed by Hioki’s commercialization of no-metal-contact
voltage measurement technology, which not only eliminates the
risk of electric shock while performing electrical work in the
field, but also contributes greatly to reducing workload, both
psychologically and in terms of man-hours required to complete
a task. In addition, the product’s size and interface are well
considered in light of a basic design that differs from past
products due to the use of no-contact technology.”

CAT IV 600 V, CAT III 1000 V

Key Features

• Simply clip clamps onto wire insulation
• Green LED arrow clearly shows phase direction, perfect for visual reports
• CAT III 1000V
• Rotating LED indicator shows the phase sequence for a 3-phase power supply at a glance
• Intermittent beeps signal positive phase; continuous tone signals reverse phase
• Magnetic base allows the instrument to be secured on a distribution panel

Easy-to-understand detection of normal phase with lit arrow

The arrow in the center of the instrument turns green to indicate normal phase. In this way, normal phase can be recognized at a glance. In addition, the arrow shows up clearly in photographs, making the PD3129 ideal for documenting proper installation in end-of-project reports.

Safe, no-metal-contact design

The PD3129 uses no-metal-contact clips that need only be clipped to the outside of each insulated wire, allowing phase to be detected safely.

Magnetic back for maximum work efficiency

Four magnets on the back of the instrument allow it to be secured in place on distribution panels. By leaving your hands free for other tasks, this feature dramatically boosts work efficiency.

Basic specifications

FunctionsPhase detection (positive and negative)
Voltage detection methodStatic induction
Voltage range70 to 1000 V AC (50/60 Hz) (sine wave, continuous input)
Frequency range45 Hz to 66 Hz
Object to be connected7 mm (0.28 in) to 40 mm (1.57 in) of insulated wiring
DisplayPhase detection : Positive ; 4 LEDs lit in clockwise order and the buzzer sounds intermittently, green arrow lights up
Negative ; 4 LEDs lit in counterclockwise order and the buzzer sounds continuously
Battery check functionPower ON lamp: lights up (Power ON), blinks (Battery LOW)
Auto power offAuto shut off if no activity is detected after power is turned ON for 15 minutes
Power supplyR6P (AA) manganese battery ×2, Continuous use: 70 hr
Dimensions and mass70 mm (2.76 in)W × 75 mm (2.95 in)H × 30 mm (1.18 in)D, 240 g (8.5 oz), Cord length : 0.7 m (2.30 ft)
AccessoriesCarrying case ×1, Strap ×1, Spiral tube ×1, Instruction manual ×1, R6P (AA) manganese battery ×2
Catalog: PHASE DETECTOR PD3129Download PDF  [1MB]English

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