Voltage tester probe Topex 140 mm for 125–250 V SRU (model 39D055)

The Topex voltage tester probe SRU is a compact handheld tool, 140 mm in length, designed to detect the presence of AC voltage in the 125–250 V range. Suitable for quick verification of live conductors, sockets and switches, this probe provides a simple method to check whether a circuit is energized. Its small size and straightforward operation make it a practical instrument for routine electrical maintenance and basic troubleshooting tasks.

Advantages

The Topex probe offers fast, one-handed checking of AC voltage within the specified range, enabling immediate identification of live circuits. Its compact 140 mm body is easy to carry and manoeuvre in confined spaces. The design emphasises straightforward use and portability while providing consistent detection accuracy for common household and light commercial installations.

Suitable for

• Quick checks of household and office sockets
• Verifying switches and simple wiring during maintenance
• Basic troubleshooting of electrical circuits and outlets
• Temporary verification of conductor presence before non-invasive work

Key specifications

• Detection range: AC 125–250 V
• Overall length: 140 mm
• Handheld probe form factor for single-handed use
• Designed for non-contact or simple contact voltage indication (as applicable)
• Suitable for general electrical maintenance and safety checks in residential and light commercial environments

How to use

Hold the probe by the insulated handle and bring the tip into contact with the conductor, socket contact, or accessible point of the circuit to be tested, following standard safety procedures. Observe the indicator (visual or audible, depending on probe variant) to determine presence of AC voltage within the 125–250 V range. Avoid using the probe on circuits outside the specified range and do not rely on it for isolation verification — always de-energise and confirm with an appropriate testing method before performing live work.

Usage recommendations

Use the probe for preliminary voltage checks and routine inspections only. For work requiring full safety verification, use a calibrated multimeter or a dedicated voltage tester with documented accuracy and insulation ratings. Store the probe in a dry environment and inspect the insulation and tip for damage before each use.