Involvement:General (knows how to use it) - Ownership:more than 1 month
Good construction, can handle being shorted across mains power (it protected me from an unexpectedly shorted wire!) even at 220V! When the probe is close enough, you can easily hear the tone. Although it seems made for telephone and network wires, works just fine on 220V power wiring. Makes it very easy to quickly determine if a given junction is relevant or not.
Not sensitive enough to trace wires through concreate. That is, when the wires are inside pipes inside concrete. Generates a flat tone, instead of a warbling one, so it's sometimes hard to tell if the probe is detecting the signal or just getting interference.
There seems to be an earphone jack, so you can do the testing even in noisy environments, but I haven't used it.
If you're trying to figure out the wiring of your home, or debug a short, this tool helps a lot.
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