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Circuit Tester, Neon

By Bob Formisano, About.com

Neon Circuit Tester

© Home-Cost.com 2006
Definition:
An inexpensive, extremely handy, versatile and simple to use electrical circuit tester. This pocket sized testing tool has two probes and works with voltage in the home up to 500 volts. It has no power by itself but uses a neon indicator that only glows when power is present. The test light glows brighter as voltage increases.

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