What is it's purpose if not to check for voltage?
I always check that it is working either with a known live circuit or simply rubbing it on my sleeve. It will light if it's operational. I have never had it read dead on a live circuit, it will sometimes give a false live reading.
I carry the Fluke non contact tester and a Fluke T5-1000 Multimeter. I am not sure which is more reliable, they both rely on electronics to produce a correct reading.
Bob
