The screwdriver is the most widespread handheld tool, commonly used by electricians, DIY enthusiasts, or professionals. Among the variations of screwdrivers, there is the electrician's screwdriver, also known as a tester screwdriver. Tester screwdrivers contain a lamp that lights up when the tool is in contact with an electric current ranging from 12 to 220 volts.
Generally equipped with a sheathed blade, the electrician's screwdriver is primarily used to detect the presence of voltage between 10 and 500 volts at a circuit point in any electrical distribution network thanks to a pilot lamp installed in the insulating handle that can withstand up to 1000 volts. This voltage detector effectively allows to check if cables and parts are truly de-energized before any manipulation for installation or repair work. To ensure the user's safety while providing a good grip, the handle of a tester screwdriver is always designed according to international safety standards. Some tester screwdrivers are equipped with a clip, which allows you to attach them to a pocket, for example. Caution is required, however, with this type of screwdriver, as it does not light up on a low voltage or neutral. That's why professionals today use electronic testers, also known as multimeters, devices that detect the presence of the electric field from a short distance.
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