Non-Contact Voltage Tester Pen AC 6V–390V | Buzzer & LED

AC 6V–390V Non-Contact Voltage Tester Pen with Buzzer & LED Alarm

Whether you're a DIY homeowner tackling electrical projects or a professional electrician working on complex installations, this compact non-contact voltage tester pen is the go-to tool for fast, safe, and accurate electrical detection. Covering a wide range of AC 6V to 390V, it lets you verify live wires, check continuity, and identify phases — all without touching a bare conductor.

Key Features

• Wide Voltage Detection Range: Accurately detects AC voltages from 6V to 390V — suitable for low-voltage and standard household/commercial circuits alike.
• Non-Contact Testing: Simply hold the tip near a wire, outlet, or switch — no direct contact required for safer electrical checks.
• Audible Buzzer Alarm: Built-in buzzer and LED indicator alert you instantly when live voltage is detected, so you can work with confidence.
• Breakpoint Finding: Quickly locates breaks or faults in wiring, helping you troubleshoot circuits faster and more efficiently.
• Continuity Check: Built-in continuity testing function lets you confirm complete circuits in seconds.
• Phase Identification: Identifies live and neutral wires with ease — ideal for panel work, outlet wiring, and fixture installation.
• Pen-Style Design: Slim, lightweight, and ergonomic form factor fits easily in a pocket or tool bag — always within reach on the job.
• Ready to Use: No complex setup — simply power on and start testing right out of the box.

Who Is It For?

This voltage tester pen is ideal for:

• Electricians and electrical contractors
• DIY homeowners handling home maintenance and renovations
• HVAC technicians and maintenance professionals
• Anyone who needs a fast, reliable way to verify electrical circuits safely

Specifications

• Detection Range: AC 6V – 390V
• Detection Method: Non-contact
• Indicators: LED light + audible buzzer
• Functions: Voltage detection, continuity check, breakpoint finding, phase identification
• Form Factor: Pen / probe style
• Vendor: Qme

Work Smarter & Safer

Electrical safety is paramount on any job site or home project. For guidelines on safe electrical work practices, the U.S. Occupational Safety and Health Administration (OSHA) Electrical Safety page offers comprehensive standards and best practices for working around live circuits.

Frequently Asked Questions

Q: What voltage range does this non-contact voltage tester pen detect?

A: This voltage tester pen detects AC voltages across a wide range — from as low as 6V up to 390V — making it suitable for low-voltage systems, standard household circuits (110V/120V), and higher commercial voltages (220V/240V).

Q: How does the non-contact voltage tester work?

A: Simply bring the tip of the tester pen close to a wire, outlet, switch, or electrical component. The built-in sensor detects the presence of AC voltage without requiring direct contact. When voltage is detected, both the LED indicator lights up and the audible buzzer sounds, providing an immediate dual alert.

Q: Can this tester pen find wire breakpoints?

A: Yes! The breakpoint-finding function allows you to trace along a wire and pinpoint exactly where a break or fault occurs in a circuit. This makes troubleshooting damaged or faulty wiring much faster and more precise compared to traditional methods.

Q: Is this voltage tester suitable for beginners and professionals alike?

A: Absolutely. The pen-style tester is designed for ease of use — no complicated setup or calibration needed. It's ideal for professional electricians who need a reliable on-site tool, as well as DIY homeowners who want a safe and straightforward way to check circuits during home maintenance or renovation projects.