Hioki 3481-20 Voltage Detector 40V–600V

Hioki 3481-20 Voltage Detector

The 3481-20 is a simple, reliable non-contact AC voltage detector for checking whether a conductor or terminal is live before making contact. The red LED pilot light and buzzer activate immediately when AC voltage between 40V and 600V is detected — no direct contact with the conductor required. It is the first safety check before any wiring or measurement work.

Key Features

• Non-contact AC voltage detection 40V to 600V (50/60Hz)
• Variable maximum sensitivity range: 40V to 80V AC
• Red LED lights up and buzzer sounds when voltage is detected
• CAT IV 600V safety rating — suitable for all industrial and commercial voltages
• LR44 button alkaline battery ×3, approximately 5 hours continuous use
• Compact 20 × 126 × 15mm, just 30g

Applications

Live wire checking before wiring or maintenance work, socket and outlet testing, cable and conduit tracing, panel inspection safety checks. An essential safety tool for electricians, maintenance engineers and facility managers — always check before you touch.

Important Safety Note

The 3481-20 detects the presence of AC voltage — it does not measure voltage level. Always use in conjunction with a calibrated multimeter for voltage measurement. Shielded cables may not be detectable.