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2. Electrical tester pen - Wikipedia

   en.wikipedia.org/?title=Electrical_tester_pen&...

   Retrieved from "https://en.wikipedia.org/w/index.php?title=Electrical_tester_pen&oldid=447664401"

3. Test light - Wikipedia

   en.wikipedia.org/wiki/Test_light

   A voltage tester with three lamps to give an approximate indication of voltage magnitude. The test light is an electric lamp connected with one or two insulated wire leads. [1] Often, it takes the form of a screwdriver with the lamp connected between the tip of the screwdriver and a single lead that projects out the back of the screwdriver. By ...

4. Continuity tester - Wikipedia

   en.wikipedia.org/wiki/Continuity_tester

   Entry-level cable testers are essentially continuity testers. A continuity tester is an item of electrical test equipment used to determine if an electrical path can be established between two points; [1] that is if an electrical circuit can be made. The circuit under test is completely de-energized prior to connecting the apparatus. [1]

5. Multimeter - Wikipedia

   en.wikipedia.org/wiki/Multimeter

   Battery checking for simple 1.5 V and 9 V batteries. This is a current-loaded measurement, which simulates in-use battery loads; normal voltage ranges draw very little current from the battery. Various sensors can be attached to (or included in) multimeters to take measurements such as: Luminance; Sound pressure level; pH; Relative humidity

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7. Electric pen - Wikipedia

   en.wikipedia.org/wiki/Electric_pen

   The need for batteries in the electric pen ultimately caused its steady decline, as mechanical pens that did not require batteries to operate took over the market by 1880. [1] These pens, along with other cheaper and simpler stencil-making technologies quickly became more popular and widely used, until all were eventually overtaken by the ...

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9. Solenoid voltmeter - Wikipedia

   en.wikipedia.org/wiki/Solenoid_voltmeter

   When testing power supply circuits, a high-impedance connection (that is, a nearly open-circuit fault such as a burned switch contact or wire joint) in the power path might still allow enough voltage/current through to register on a high-impedance digital voltmeter, but it probably can't actuate the solenoid voltmeter. For use with high ...