Non-Metallic Contact Voltage Detector with LED Light

Hioki leads the industry in non-metallic contact test and measurement technology that promotes safety on the worksite. The Hioki 3481 is a pen-style, non-metallic contact voltage detector with a bright LED light that promotes safety and work efficiency even in dim worksites. When voltage is detected, the LED lights red along with an audio signal.

Model No. (Order Code)


CAT IV 600 V

Key Features

• Non-contact detection of AC voltage from 40 V to 600 V with bright LED light • Pen-style, compact detector with pocket clip • Both visual and audible voltage detection indication • Meets safety standards for CAT IV 600 V environments • Prevent dead batteries with battery self-check function and auto power-off function

Safe, compact voltage detection with CAT IV (600 V) capability

Thanks to a compact, lightweight design, it’s easy to use this instrument anywhere. The absence of any exposed metal in the sensor enables safe measurement.

Light designed to facilitate use in dim locations

The tip of the instrument incorporates a light, which is convenient when you need to check area being measured or your work area when it’s dark.

Functionality for adjusting sensitivity based on the operating environment

The instrument’s detection sensitivity can be adjusted within the range of 40 V to 80 V AC.

■ Basic specifications

Measurement functionVoltage detection
Operating voltage range40 V to 600 V AC (When brought into contact with a 2 mm^2 insulated cable equivalent to 600 V polyvinyl chloride insulated wire)
Maximum sensitivity variable range 40 V to 80 V AC (80 V at the time of shipment)
Operating frequency50 Hz/ 60 Hz
Pilot lightRed LED lights up and the buzzer sounds when the wire is live
Battery checkWhite LED is dim or out when the batteries are low.
Auto power offThe power will be turned off automatically if the instrument remains idle for 3 minutes after the power is turned on.
Power supplyLR44 button alkaline batteries ×3, Continuous use: 5 hr (Power ON standby state)
Dimensions and mass20 mm (0.79 in)W× 126 mm (4.96 in)H× 15 mm (0.59 in)D (excluding projections), 30 g (1.1 oz) (including LR44 button alkaline batteries)
AccessoriesInstruction manual ×1, LR44 button alkaline batteries ×3 (for trial purposes only)

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Seminar Videos On Demand

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Seminar Schedule

Registration Open

BIXPO 2019 - Gwangju, Korea

Nov 6, 2019 - Nov 8, 2019

Registration Open

ENTECH 2019 - Busan, Korea

Sep 18, 2019 - Sep 20, 2019

Registration Open

FISUEL GAM 2019 - Beirut, Lebanon

Apr 29, 2019 - May 2, 2019

Registration Open

Global Electric Power Tech 2019 - Seoul, Korea

May 29, 2019 - May 31, 2019


Catalog: VOLTAGE DETECTOR 3481 Download PDF  [1MB] English

User Guides

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Instruction Manual English

Outline Drawings

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Technical Notes

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Declaration of Conformity


Drivers, Firmware

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