Voltage tester Wiha 45222 up to 400 V AC CAT II with 2x AAA batteries

The Wiha 45222 voltage tester is a handheld tool for detecting alternating current (AC) voltage up to 400 V with a CAT II safety rating. Supplied with two AAA batteries, this compact tester is intended for quick contact and non-contact voltage checks as specified by the manufacturer. Its design targets electricians and maintenance technicians who need a portable instrument for fault finding, verifying live circuits and basic on-site troubleshooting.

Advantages

The tester combines a clear detection range up to 400 V AC with a CAT II safety classification, offering a balance between measurement capability and protection for single-phase installations. Supplied batteries allow immediate use out of the box. The handheld format provides ease of handling for quick checks in confined or elevated locations. The device supports both contact and non-contact testing modes as described by the manufacturer, enabling flexible approaches to voltage verification.

Suitable for

• Quick verification of live single-phase circuits up to 400 V AC
• Basic fault finding and on-site troubleshooting
• Maintenance inspections in residential and light commercial environments
• Portable checks in confined spaces or at height

Key specifications

• Voltage detection range: up to 400 V AC
• Safety category: CAT II
• Power supply: 2 × AAA batteries (included)
• Form factor: handheld tester suitable for contact and non-contact checks (manufacturer specified)

How to use

Install the supplied AAA batteries according to the polarity markings, then power the tester on following the manufacturer’s instructions. For non-contact voltage detection, bring the sensor end close to the conductor or outlet and observe the indication method described by the manufacturer. For contact checks, make contact with the intended test point as instructed by the manufacturer while observing safe working practices. Always ensure that the tester is functioning correctly on a known live source before and after testing.

Usage recommendations

Use appropriate personal protective equipment and follow local safety regulations. Verify the tester’s operation on a known live circuit before use, and do not exceed the specified 400 V AC detection range or apply the device in environments requiring higher safety categories than CAT II.