It is used to detect the presence and direction of electric current by the deflection of a magnetic needle. It consists of an insulated former wound with 30 turns of copper wire and provided with two terminals and circular scale marked 0-180°-0...
Comprising plastic fomer with terminals and circle marked 0-180-0 divided and figured every 45 degree, with magnet pivot, wound with 30 turns enamelled copper wire and complete with 75mm magnetic needel with brass bearing operates on voltage 4-6...