Non-contact voltage tester
Fluke 1AC-A1-II VoltAlert
The line-voltage-only VoltAlert pen, with a self-test that runs whenever the tip is near voltage.
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Best for
A simple, rugged live/dead check on 120 V and 240 V branch circuits
Specifications
| Detection range | 90–1000 V AC |
|---|---|
| Indication | Glowing red tip + beep |
| Safety rating | CAT IV 1000 V |
Specifications as published by Fluke. Confirm against the current spec sheet before buying — manufacturers revise models without renaming them.
What's good
- Voltbeat self-test gives you a continuous confidence check on the tester itself
- Very hard to kill — survives the toolbox
- Unambiguous single-purpose readout
What's not
- 90 V threshold means it ignores low-voltage control wiring entirely
- No flashlight
Our verdict
The single-range counterpart to the Klein. Pick this one if all you ever test is 120/240 V branch circuits and you want the most durable, least fiddly pen available. Pick the dual-range Klein if thermostat, doorbell or landscape-lighting wiring is also in your future.
Compare with the alternatives
- Klein Tools NCVT-3P — confirming a circuit is dead before you open a device or box
- Sperry Instruments GFI6302 — checking every outlet in a house quickly for miswiring
- Klein Tools RT250 — diagnosing voltage drop or a flaky circuit, not just wiring order
- Klein Tools ET310 — labeling a panel without two people and a lot of shouting
- Klein Tools MM400 — a first multimeter that will not be outgrown for home work
- Fluke 117 — anyone who will do this more than once a year
- Klein Tools CL800 — finding out what a circuit or appliance is actually drawing
- Fluke 323 — measuring current in a tight, densely packed load center