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Voltage detectors are used to test wiring for live (or hot) current in electrical wiring. Typically in a pen-like design, a voltage tester is a standard electrician tool to detect current in wires, cables, cords, circuit breakers, lighting fixtures, switches, and electrical outlets. Many electrical tester or continuity tester models have an easy-to-read LED light to read detector results. We also have power meters and analyzers, analog multimeters, test leads and probes, and other current probes.