Voltage testers are used to determine the presence or absence of voltage in a piece of equipment under test. Voltage testers are generally specific to AC or DC
voltage. Most are suitable for either line-voltage or lower-voltage ranges though some are intended for mains-voltage detection.
Often in pen form, voltage testers are basically just an electric lamp connected with one or two insulated wire leads. They are inserted into a power receptacle
where the presence of voltage at the receptacle will light the lamp (or another indication, depending upon the type of tester). It’s often desirable to test
outlets multiple times to make sure it has been done correctly and that test results are accurate.
In addition to the contact voltage tester, some are designed as non-contact. These rely on detecting capacitive current, the changing current field around energized
objects, and require no direct contact with the circuit. Some non-contact voltage testers are amplified which provides stronger or weaker indication intended to
gauge the relative strength of the detected voltage thus providing clues about the location of an energized object.
If you have any questions regarding voltage testers please don't hesitate to speak with one of our engineers by e-mailing us at firstname.lastname@example.org or calling 1-800-884-4967.