Fluke 1AC II VoltAlert Non-Contact Voltage Tester 90–1000V AC — Pocket-Sized, CAT IV, Audible Beep

The Fluke 1AC II VoltAlert is a pocket-sized, non-contact voltage tester that instantly indicates the presence of AC voltage from 90–1000 V with a glowing tip and audible beep.

This compact tester from Fluke delivers a fast, no-contact check for energized circuits, outlets, cords and terminal strips. Built for quick spot-checks on the shop floor, jobsite or at home, the 1AC II combines visible tip illumination, an optional audible tone and continuous self-test diagnostics (Fluke Voltbeat) so you know the tool is ready. Its CAT IV rating and rugged housing make it suitable for common commercial and industrial electrical environments.

How does the 1AC II show there is voltage?

When the probe tip is placed near a live conductor the tester provides two clear indicators: the tip lights red and the unit emits an audible beeper (audible can be toggled off). These simultaneous signals give immediate confirmation of an energized line without direct contact, helping you avoid unnecessary exposure to live parts.

• Visible red LED tip for quick visual confirmation
• Built-in beeper for audible confirmation; has silent mode
• Non-contact design avoids direct electrical contact with conductors
• Works on wires, outlets, cords, terminal strips and junctions

What voltage range and safety rating does it support?

The Fluke 1AC II detects AC voltage across a broad range suitable for most residential, commercial and many industrial tasks, from low-line circuits up to high-voltage distribution levels. It carries a CAT IV safety rating at the upper limits specified for non-contact testers, helping protect users in higher-energy environments when used properly.

• Detection range: 90–1000 V AC (typical models)
• CAT IV-rated construction for robust safety margins
• Designed for common electrical systems: outlets, panels, feeders
• Rugged housing resists jobsite wear and handling

How reliable is the tester over time?

Fluke built the 1AC II with continuous self-checks so the device monitors its battery and circuit integrity and gives a periodic double-flash visual signal (Voltbeat) to reassure you it’s functioning. The unit also carries a two-year limited warranty, providing added confidence for routine use.

• Continuous self-test (Voltbeat) flashes to show operational status
• Two-year warranty backed by Fluke support
• Simple battery replacement keeps the tester serviceable
• Minimal maintenance—no calibration required for basic checks

How do electricians and maintenance teams use it day-to-day?

Technicians typically carry the pocket-sized tester for quick verification of live circuits before working on panels, troubleshooting equipment, or confirming de-energized wiring. Its non-contact method speeds checks while reducing the need to remove covers or use more involved test setups.

• Quickly check outlets and extension cords for live voltage
• Verify presence or absence of line voltage at terminal strips
• Use silent mode in noise-sensitive environments or when stealth checks are needed
• Fits in a pocket or tool pouch for everyday accessibility

Who is this for: The Fluke 1AC II VoltAlert is ideal for electricians, maintenance crews, service technicians, safety personnel and DIYers who need a fast, reliable non-contact check for AC voltage. If you want a pocketable device with visible and audible indicators, continuous self-test diagnostics and a robust safety rating for routine on-site checks, this tester fits those needs without the complexity of larger instruments.