ESPtronics 1-Piece Line Tester Electrical Screwdriver Tool - Original for Electronics & Electrical Work, Testing Electronic Components - Perfect for Electricians, DIY Home Repairs & Circuit Testing

A line tester is an electrical tool used to test the presence of current and to identify phase / live wire in electrical installations. When the metal tip of the tester comes in contact with a live circuit, a small light encased inside the handle of the tool starts glowing.

An Electrical Line Tester, also known as a voltage tester, is an indispensable tool used to determine the presence or absence of an electric current in a circuit or electrical device.

It essentially acts as a diagnostic tool, allowing electricians and users to assess the status of an electrical line quickly and safely.

A fundamental tool known as a voltage or current detector, a phase, electric mains, or line tester is used to test and identify the phase, live, hot, or positive (+) wire or conductor in an electrical installation, it is also known as voltage or current detector.

An electric instrument which is used to check the flow of electric current is called tester. It is attached to the terminals of the electric circuit.

An electric instrument which is used to check the flow of electric current is called tester. It is attached to the terminals of the electric circuit.