Compass BOX

(Permanent Magnet) It consists of a bakelite moulded ring 170 mm dia., with three sets of winding either 2, 50 and 500 turns or 2,5 and 50 turns (depending upon the requirement) respectively, carefully insulted, connected to heavy brass terminals. The number of turns are clearly marked between the terminals. (For deflection magnetometer or tangent galvanometer). Compressing as thick bakelite moulded case of 125 mm dia.