Published on March 13, 2017
When I was an apprentice my first set of “test lamps” was a very basic Steinel tester with two LEDs that simply indicated the presence of voltage at a reasonable test current between the range of 6 to 415V and also indicated the polarity if it was DC.
I noticed that they sell similar devices quite cheaply on eBay, so I bought a few from different sources to compare.
I’d say that I would not fully trust them for use on an industrial supply, but for home wiring they are infinitely better than the very dubious neon screwdrivers and a much more reliable indicator than the simple and sometimes vague non-contact detectors.
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