Continuity tester Wiha 45222, handheld tester for continuity and voltage up to 400 V AC, safety CAT II

The Wiha 45222 handheld continuity tester is a compact tool for checking electrical continuity and detecting AC voltage up to 400 V. Designed for basic troubleshooting, it assists technicians and electricians in quickly identifying open circuits, short circuits, and presence of live voltage in cables, connectors and small installations. The tester is intended for use under CAT II conditions and is suitable for workshop or on-site applications where a portable, easy-to-operate instrument is required.

Advantages

The tester combines continuity checking and AC voltage detection in a single handheld device, reducing the need to switch tools during routine inspections. Its compact form factor and simple controls make it easy to carry and operate with one hand. The clear indication of continuity and live voltage supports faster diagnostics and safer verification of circuits. The design follows safety considerations for CAT II measurement environments.

Suitable for

• Basic electrical troubleshooting and fault finding
• Checking continuity of cables, connectors and wire harnesses
• Verifying presence of AC voltage up to 400 V during inspections
• Workshop testing and on-site maintenance tasks under CAT II conditions

Key specifications

• Functionality: continuity testing and AC voltage detection up to 400 V
• Measurement category: CAT II rating for intended environments
• Form factor: handheld, portable tester suitable for one-handed use
• Indication: visible and/or audible signals to indicate continuity and live voltage
• Typical applications: cable, connector and small installation checks

How to use

Before use, visually inspect the tester and probes for damage. Connect the test leads or probes to the circuit or conductor under test according to standard safety procedures. For continuity checks, place the probes across the conductor or connection; observe the tester indication for continuity or open circuit. For voltage detection, measure across the circuit or between conductor and earth, observing the indication if AC voltage up to 400 V is present. Always follow safe working distances and de-energise circuits where required by procedure before making direct contact.

Usage recommendations

Use appropriate personal protective equipment and confirm that the tester is functioning on a known live source before and after critical measurements. Do not use the tester on installations or environments that exceed its CAT II rating or the specified 400 V limit. Store the device in a dry, protected place and replace batteries as recommended by the manufacturer to ensure reliable operation.