The HIOKI 3129-10 Non-Contact Phase Rotation Meter is designed for safe and efficient phase detection in three-phase electrical systems. This instrument accommodates thick insulated conductors from 7 mm to 40 mm in diameter, making it suitable for industrial environments, power distribution panels, and service drops. It enables users to verify phase sequence and detect live lines without direct metal contact, reducing risk during installation, commissioning, and troubleshooting tasks. The meter operates within a voltage range of 70 to 1000 V AC and a frequency range of 45 Hz to 66 Hz, providing reliable performance for a wide range of electrical applications.

The 3129-10 features intuitive LED indicators and audible alerts for both positive and negative phase detection, ensuring clear feedback during operation. Additional functions include live line checks and battery status monitoring. The device is powered by two AA batteries, offering up to 200 hours of continuous use. It meets CAT IV 600 V and CAT III 1000 V safety standards and comes with a carrying case, strap, spiral tube, and instruction manual. This meter is ideal for professionals who require accurate phase verification and safety in demanding electrical environments.

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.

Key Features:

• Non-contact phase detection for enhanced safety
• Suitable for thick conductors (7 mm to 40 mm diameter)
• Voltage range: 70 to 1000 V AC (continuous sine wave)
• Frequency range: 45 Hz to 66 Hz
• LED and buzzer indicators for phase sequence (positive/negative)
• Live line check and battery check functions
• CAT IV 600 V and CAT III 1000 V safety ratings
• Up to 200 hours of operation with two AA batteries
• Includes carrying case, strap, spiral tube, and instruction manual
• Three-year product warranty and one-year accuracy guarantee