Test light
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A test light, test lamp, voltage tester, or mains tester is a piece of electronic test equipment used to determine the presence of electricity in a piece of equipment under test. A test light is simpl
Neon test lamp for line voltages
Non-Contact AC Voltage Detector
A voltage tester with three lamps to give an approximate indication of voltage magnitude
UK GS38-compliant test lamp, with separately-fused test prods and current-limiting resistor, suitable for use up to 1000 V
Continuity tester
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A continuity tester is an item of electrical test equipment used to determine if an electrical path can be established between two points; that is if an electrical circuit can be made. The circuit und
Test light
…can be used to test for contact closure or wire continuity. Care must be taken to ensure that all circuits are completely de-energized before use of a continuity tester lamp, or the lamp will be destroyed. Sometimes a flashlight (torch) is field-modified or factory-manufactured with test leads, to allow the flashlight…
Entry-level cable testers are essentially continuity testers.