Non-Contact Voltage Tester Wiha SB2551301 with LED Indicator, Pen-Style Detector

The Wiha SB2551301 non-contact voltage tester is a pen-style detector designed to quickly indicate the presence of live AC voltage without direct contact. The compact, lightweight design houses a visual LED indicator that lights when voltage is detected on cables, outlets and electrical equipment. This tool is intended to provide a fast visual check during installation, maintenance and troubleshooting to help verify whether a conductor or device is energized.

Advantages

The pen-style form factor and low weight make the tester easy to carry in a pocket or tool pouch and to use single-handed. Non-contact detection allows preliminary checks without touching live conductors, reducing the need to expose wires. The integrated LED indicator gives an immediate visual signal of voltage presence. The simple one-piece design requires no probe tips or separate leads, allowing quick spot checks on cables, receptacles and equipment panels.

Suitable for

• Quick verification of live AC voltage on insulated conductors
• On-site maintenance checks for electricians and technicians
• Preliminary troubleshooting of outlets, cords and equipment
• Portable field inspections where a compact detector is required

Key specifications

• Detection method: non-contact capacitive sensing for AC voltage
• Form factor: pen-style detector for single-handed use
• Indicator type: LED visual voltage indication
• Power: battery operation (user-replaceable cell)
• Weight and size: compact and lightweight for pocket carry

How to use

To use the tester, insert a fresh battery if required, switch the device on according to the manufacturer's switch or contact procedure, and bring the tip of the pen close to the insulated conductor, outlet slot or equipment surface to be tested. Observe the LED indicator: illumination indicates detected AC voltage. For reliable results, test the detector on a known live source before use to confirm operation, and follow any manufacturer safety instructions for distance and orientation when approaching conductors.

Recommendations

Use the tester as a preliminary check only. Always de-energize circuits and verify with appropriate contact instruments when performing work that requires proven absence of voltage. Store the tester in a dry, clean place and replace the battery regularly to maintain reliable indications.