Which tool is used to test for the presence of voltage?

A voltage tester is specifically designed to determine the presence of voltage in a circuit or device. This tool is essential for ensuring safety before commencing any electrical work, as it allows a technician to verify whether a circuit is energized or not. The simplicity and direct nature of a voltage tester make it effective for this purpose, as it typically provides a clear indication, often through lights or sounds, when voltage is detected.

While a multimeter can also be used to measure voltage, it serves a broader purpose by allowing technicians to measure current, resistance, and other electrical parameters. Although a clamp meter can measure current without disconnecting the circuit, it may not directly indicate voltage. An insulation resistance tester primarily assesses the quality of insulation in electrical systems but is not a conventional tool for checking the presence of voltage in the same straightforward manner as a voltage tester. Hence, the voltage tester is the most appropriate choice for the task of testing for the presence of voltage.