Stationary unit of contact and coil type in the medium range Output of 2500 Amp in 6 steps for longitudinal magnetisation. Suitable for detection of surface and near surface crecks in ferro-magnetic components upto 1000 mm long. 80 mm dia and 50 k weight. Facility for combined magnetisation by simultaneous application of circular and longitudinal fields provided. Dark room an integral part of the unit. Demagnetisation by separate demagnetiser. HWDC facility for detection of sub-surface cracks and inclusions provided optionally.