Testboy 105 Non-Contact Voltage Tester CAT IV 1000 V AC with LED, Acoustic and Vibration Indication

Electricians, maintenance technicians, and DIY enthusiasts working on live AC circuits need a fast, safe way to confirm voltage presence without direct contact. The Testboy 105 non-contact voltage tester detects AC voltage from 12 to 1000 V with CAT IV 1000 V safety rating, providing clear optical, acoustic, and vibration alerts. Its capacitive sensing principle and built-in flashlight make it ideal for troubleshooting outlets, switches, and wiring in residential, commercial, and industrial environments.

Key specifications

• Voltage measurement type: AC
• Voltage range: 12 – 1000 V AC
• Frequency range: 50 – 400 Hz
• Overvoltage category: CAT IV 1000 V
• Indication methods: Optical (LED), acoustic (buzzer), vibration
• Integrated flashlight: Yes (white LED)
• Automatic shutdown: Yes
• Operating temperature: -10 °C to +50 °C
• Storage temperature: -20 °C to +60 °C
• Protection class: IP40
• Safety standard: IEC/EN 61010-1, IEC/EN 61010-031
• Housing material: Impact-resistant ABS plastic
• Measurement principle: Capacitive
• Pollution degree: 2
• Altitude: Up to 2000 m
• Power supply: 2 × 1.5 V AAA batteries

Why choose it

The Testboy 105 combines three alert modes—LED, buzzer, and vibration—so you never miss a voltage indication, even in noisy or brightly lit environments. Its CAT IV 1000 V rating ensures safe use on the highest energy circuits, and the impact-resistant ABS housing withstands daily job-site abuse. The automatic shutdown preserves battery life, while the integrated flashlight helps you work in dark junction boxes or behind panels.

Ideal use cases

• Verifying presence of AC voltage before working on electrical installations
• Troubleshooting outlets, switches, and light fixtures
• Locating cable breaks and identifying live wires in walls
• Testing industrial control panels and distribution boards
• Quick safety checks by electricians during routine maintenance

Good to know

The tester operates on two AAA batteries (not included) and is designed for indoor use with an IP40 protection rating. It meets stringent IEC/EN 61010 safety standards and can be used at altitudes up to 2000 m. For best results, test on a known live circuit before and after use to confirm proper operation.